The time from the onset of a stimulus until a response is observed.
The coordination of a sensory or ideational (cognitive) process and a motor activity.
Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.
Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.
The act of making a selection among two or more alternatives, usually after a period of deliberation.
Tests designed to assess neurological function associated with certain behaviors. They are used in diagnosing brain dysfunction or damage and central nervous system disorders or injury.
The interference with or prevention of a behavioral or verbal response even though the stimulus for that response is present; in psychoanalysis the unconscious restraining of an instinctual process.
Learning to make a series of responses in exact order.
The detailed examination of observable activity or behavior associated with the execution or completion of a required function or unit of work.
The selecting and organizing of visual stimuli based on the individual's past experience.
Intellectual or mental process whereby an organism obtains knowledge.
Signals for an action; that specific portion of a perceptual field or pattern of stimuli to which a subject has learned to respond.
An abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading.
The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.
Conceptual functions or thinking in all its forms.
Mental process to visually perceive a critical number of facts (the pattern), such as characters, shapes, displays, or designs.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
An act performed without delay, reflection, voluntary direction or obvious control in response to a stimulus.
Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.
A negative shift of the cortical electrical potentials that increases over time. It is associated with an anticipated response to an expected stimulus and is an electrical event indicative of a state of readiness or expectancy.
Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.
A nonspecific term used to describe transient alterations or loss of consciousness following closed head injuries. The duration of UNCONSCIOUSNESS generally lasts a few seconds, but may persist for several hours. Concussions may be classified as mild, intermediate, and severe. Prolonged periods of unconsciousness (often defined as greater than 6 hours in duration) may be referred to as post-traumatic coma (COMA, POST-HEAD INJURY). (From Rowland, Merritt's Textbook of Neurology, 9th ed, p418)
That portion of the electromagnetic spectrum from the UHF (ultrahigh frequency) radio waves and extending into the INFRARED RAYS frequencies.
Remembrance of information for a few seconds to hours.
The positioning and accommodation of eyes that allows the image to be brought into place on the FOVEA CENTRALIS of each eye.
A late-appearing component of the event-related potential. P300 stands for a positive deflection in the event-related voltage potential at 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed)
The point or frequency at which all flicker of an intermittent light stimulus disappears.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
Differential response to different stimuli.
Cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system.
Psychophysical technique that permits the estimation of the bias of the observer as well as detectability of the signal (i.e., stimulus) in any sensory modality. (From APA, Thesaurus of Psychological Index Terms, 8th ed.)
Electrical responses recorded from nerve, muscle, SENSORY RECEPTOR, or area of the CENTRAL NERVOUS SYSTEM following stimulation. They range from less than a microvolt to several microvolts. The evoked potential can be auditory (EVOKED POTENTIALS, AUDITORY), somatosensory (EVOKED POTENTIALS, SOMATOSENSORY), visual (EVOKED POTENTIALS, VISUAL), or motor (EVOKED POTENTIALS, MOTOR), or other modalities that have been reported.
A behavior disorder originating in childhood in which the essential features are signs of developmentally inappropriate inattention, impulsivity, and hyperactivity. Although most individuals have symptoms of both inattention and hyperactivity-impulsivity, one or the other pattern may be predominant. The disorder is more frequent in males than females. Onset is in childhood. Symptoms often attenuate during late adolescence although a minority experience the full complement of symptoms into mid-adulthood. (From DSM-V)
Timed test in which the subject must read a list of words or identify colors presented with varying instructions and different degrees of distraction. (Campbell's Psychiatric Dictionary. 8th ed.)
A set of cognitive functions that controls complex, goal-directed thought and behavior. Executive function involves multiple domains, such as CONCEPT FORMATION, goal management, cognitive flexibility, INHIBITION control, and WORKING MEMORY. Impaired executive function is seen in a range of disorders, e.g., SCHIZOPHRENIA; and ADHD.
Disturbances in mental processes related to learning, thinking, reasoning, and judgment.
The effect of environmental or physiological factors on the driver and driving ability. Included are driving fatigue, and the effect of drugs, disease, and physical disabilities on driving.
The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.
Simulation of symptoms of illness or injury with intent to deceive in order to obtain a goal, e.g., a claim of physical illness to avoid jury duty.
Performance of complex motor acts.
Use of sound to elicit a response in the nervous system.
Awareness of oneself in relation to time, place and person.
The awareness of the spatial properties of objects; includes physical space.
Recording of the changes in electric potential of muscle by means of surface or needle electrodes.
A technique that involves the use of electrical coils on the head to generate a brief magnetic field which reaches the CEREBRAL CORTEX. It is coupled with ELECTROMYOGRAPHY response detection to assess cortical excitability by the threshold required to induce MOTOR EVOKED POTENTIALS. This method is also used for BRAIN MAPPING, to study NEUROPHYSIOLOGY, and as a substitute for ELECTROCONVULSIVE THERAPY for treating DEPRESSION. Induction of SEIZURES limits its clinical usage.
Upper central part of the cerebral hemisphere. It is located posterior to central sulcus, anterior to the OCCIPITAL LOBE, and superior to the TEMPORAL LOBES.
Elements of limited time intervals, contributing to particular results or situations.
Readiness to think or respond in a predetermined way when confronted with a problem or stimulus situation.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
Voluntary activity without external compulsion.
Area of the FRONTAL LOBE concerned with primary motor control located in the dorsal PRECENTRAL GYRUS immediately anterior to the central sulcus. It is comprised of three areas: the primary motor cortex located on the anterior paracentral lobule on the medial surface of the brain; the premotor cortex located anterior to the primary motor cortex; and the supplementary motor area located on the midline surface of the hemisphere anterior to the primary motor cortex.
Those psychological characteristics which differentiate individuals from one another.
Complex mental function having four distinct phases: (1) memorizing or learning, (2) retention, (3) recall, and (4) recognition. Clinically, it is usually subdivided into immediate, recent, and remote memory.
The minimum amount of stimulus energy necessary to elicit a sensory response.
A benzodiazepine derivative used as an anticonvulsant and hypnotic.
The rostral part of the frontal lobe, bounded by the inferior precentral fissure in humans, which receives projection fibers from the MEDIODORSAL NUCLEUS OF THE THALAMUS. The prefrontal cortex receives afferent fibers from numerous structures of the DIENCEPHALON; MESENCEPHALON; and LIMBIC SYSTEM as well as cortical afferents of visual, auditory, and somatic origin.
The part of the cerebral hemisphere anterior to the central sulcus, and anterior and superior to the lateral sulcus.
The state of being deprived of sleep under experimental conditions, due to life events, or from a wide variety of pathophysiologic causes such as medication effect, chronic illness, psychiatric illness, or sleep disorder.
The ability to respond to segments of the perceptual experience rather than to the whole.
The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.
The real or apparent movement of objects through the visual field.
A concept that stands for or suggests something else by reason of its relationship, association, convention, or resemblance. The symbolism may be mental or a visible sign or representation. (From Webster, 3d ed)
The process whereby auditory stimuli are selected, organized, and interpreted by the organism.
Relatively permanent change in behavior that is the result of past experience or practice. The concept includes the acquisition of knowledge.
The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate visual acuity and to detect eye disease.
The process of making a selective intellectual judgment when presented with several complex alternatives consisting of several variables, and usually defining a course of action or an idea.
The feeling-tone accompaniment of an idea or mental representation. It is the most direct psychic derivative of instinct and the psychic representative of the various bodily changes by means of which instincts manifest themselves.
Performance of an act one or more times, with a view to its fixation or improvement; any performance of an act or behavior that leads to learning.
Recording of the average amplitude of the resting potential arising between the cornea and the retina in light and dark adaptation as the eyes turn a standard distance to the right and the left. The increase in potential with light adaptation is used to evaluate the condition of the retinal pigment epithelium.
Learning that is manifested in the ability to respond differentially to various stimuli.
The total area or space visible in a person's peripheral vision with the eye looking straightforward.
The observable response of a man or animal to a situation.
The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli, the anterior, medius, and posterior scalenes, digastric(us), stylohyoid(eus), mylohyoid(eus), geniohyoid(eus), sternohyoid(eus), omohyoid(eus), sternothyroid(eus), and thyrohyoid(eus).
The distal part of the arm beyond the wrist in humans and primates, that includes the palm, fingers, and thumb.
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
A progressive, degenerative neurologic disease characterized by a TREMOR that is maximal at rest, retropulsion (i.e. a tendency to fall backwards), rigidity, stooped posture, slowness of voluntary movements, and a masklike facial expression. Pathologic features include loss of melanin containing neurons in the substantia nigra and other pigmented nuclei of the brainstem. LEWY BODIES are present in the substantia nigra and locus coeruleus but may also be found in a related condition (LEWY BODY DISEASE, DIFFUSE) characterized by dementia in combination with varying degrees of parkinsonism. (Adams et al., Principles of Neurology, 6th ed, p1059, pp1067-75)
The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.
Theoretical representations that simulate psychological processes and/or social processes. These include the use of mathematical equations, computers, and other electronic equipment.
The ability to estimate periods of time lapsed or duration of time.
A species of the genus MACACA inhabiting India, China, and other parts of Asia. The species is used extensively in biomedical research and adapts very well to living with humans.
The knowledge or perception that someone or something present has been previously encountered.
Voluntary or reflex-controlled movements of the eye.
A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment.
Pollution prevention through the design of effective chemical products that have low or no toxicity and use of chemical processes that reduce or eliminate the use and generation of hazardous substances.
Those forces and content of the mind which are not ordinarily available to conscious awareness or to immediate recall.
The observable response an animal makes to any situation.
Those affective states which can be experienced and have arousing and motivational properties.
The internal individual struggle resulting from incompatible or opposing needs, drives, or external and internal demands. In group interactions, competitive or opposing action of incompatibles: antagonistic state or action (as of divergent ideas, interests, or persons). (from Merriam-Webster's Collegiate Dictionary, 10th ed)
An object or a situation that can serve to reinforce a response, to satisfy a motive, or to afford pleasure.
A POSTURE in which an ideal body mass distribution is achieved. Postural balance provides the body carriage stability and conditions for normal functions in stationary position or in movement, such as sitting, standing, or walking.
Conditions characterized by a significant discrepancy between an individual's perceived level of intellect and their ability to acquire new language and other cognitive skills. These disorders may result from organic or psychological conditions. Relatively common subtypes include DYSLEXIA, DYSCALCULIA, and DYSGRAPHIA.
Force exerted when using the index finger and the thumb. It is a test for determining maximum voluntary contraction force.
Learning situations in which the sequence responses of the subject are instrumental in producing reinforcement. When the correct response occurs, which involves the selection from among a repertoire of responses, the subject is immediately reinforced.
Use of a thrombelastograph, which provides a continuous graphic record of the physical shape of a clot during fibrin formation and subsequent lysis.
The relationships between symbols and their meanings.
A hypnotic and sedative. Its use has been largely superseded by other drugs.
The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.
Observable changes of expression in the face in response to emotional stimuli.
Studies comparing two or more treatments or interventions in which the subjects or patients, upon completion of the course of one treatment, are switched to another. In the case of two treatments, A and B, half the subjects are randomly allocated to receive these in the order A, B and half to receive them in the order B, A. A criticism of this design is that effects of the first treatment may carry over into the period when the second is given. (Last, A Dictionary of Epidemiology, 2d ed)
The illumination of an environment and the arrangement of lights to achieve an effect or optimal visibility. Its application is in domestic or in public settings and in medical and non-medical environments.
Theoretical representations that simulate the behavior or activity of the neurological system, processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
The process by which the nature and meaning of tactile stimuli are recognized and interpreted by the brain, such as realizing the characteristics or name of an object being touched.
The physical activity of a human or an animal as a behavioral phenomenon.
A condition of low alertness or cognitive impairment, usually associated with prolonged mental activities or stress.
Large subcortical nuclear masses derived from the telencephalon and located in the basal regions of the cerebral hemispheres.
The process of discovering or asserting an objective or intrinsic relation between two objects or concepts; a faculty or power that enables a person to make judgments; the process of bringing to light and asserting the implicit meaning of a concept; a critical evaluation of a person or situation.
A mechanism of information stimulus and response that may control subsequent behavior, cognition, perception, or performance. (From APA Thesaurus of Psychological Index Terms, 8th ed.)
The superior part of the upper extremity between the SHOULDER and the ELBOW.
The position or attitude of the body.
The ability to foresee what is likely to happen on the basis of past experience. It is largely a frontal lobe function.
A benzodiazepine that acts as a GAMMA-AMINOBUTYRIC ACID modulator and anti-anxiety agent.
One of the convolutions on the medial surface of the CEREBRAL HEMISPHERES. It surrounds the rostral part of the brain and CORPUS CALLOSUM and forms part of the LIMBIC SYSTEM.
The sensory discrimination of a pattern shape or outline.
A benzodiazepine used as an anti-anxiety agent with few side effects. It also has hypnotic, anticonvulsant, and considerable sedative properties and has been proposed as a preanesthetic agent.
A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior.
Applies to movements of the forearm in turning the palm backward or downward. When referring to the foot, a combination of eversion and abduction movements in the tarsal and metatarsal joints (turning the foot up and in toward the midline of the body).
Cognitive disorders characterized by an impaired ability to perceive the nature of objects or concepts through use of the sense organs. These include spatial neglect syndromes, where an individual does not attend to visual, auditory, or sensory stimuli presented from one side of the body.
Dominance of one cerebral hemisphere over the other in cerebral functions.
The smallest difference which can be discriminated between two stimuli or one which is barely above the threshold.
Standardized tests designed to measure abilities, as in intelligence, aptitude, and achievement tests, or to evaluate personality traits.
A state in which attention is largely directed outward from the self.
A complex involuntary response to an unexpected strong stimulus usually auditory in nature.
Those factors which cause an organism to behave or act in either a goal-seeking or satisfying manner. They may be influenced by physiological drives or by external stimuli.
Slow or diminished movement of body musculature. It may be associated with BASAL GANGLIA DISEASES; MENTAL DISORDERS; prolonged inactivity due to illness; and other conditions.
Study of mental processes and behavior of schizophrenics.
Salts that melt below 100 C. Their low VOLATILIZATION can be an advantage over volatile organic solvents.
The science and art of collecting, summarizing, and analyzing data that are subject to random variation. The term is also applied to the data themselves and to the summarization of the data.
A centrally acting antihypertensive agent with specificity towards ADRENERGIC ALPHA-2 RECEPTORS.
The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulchi. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.
The act of "taking account" of an object or state of affairs. It does not imply assessment of, nor attention to the qualities or nature of the object.
A discipline concerned with relations between messages and the characteristics of individuals who select and interpret them; it deals directly with the processes of encoding (phonetics) and decoding (psychoacoustics) as they relate states of messages to states of communicators.
Assessment of psychological variables by the application of mathematical procedures.
Applies to movements of the forearm in turning the palm forward or upward. When referring to the foot, a combination of adduction and inversion movements of the foot.
The sum or the stock of words used by a language, a group, or an individual. (From Webster, 3d ed)
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Drugs used to induce drowsiness or sleep or to reduce psychological excitement or anxiety.
Application of statistical procedures to analyze specific observed or assumed facts from a particular study.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
Learning to respond verbally to a verbal stimulus cue.
Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.
A benzodiazepine used in the treatment of anxiety, alcohol withdrawal, and insomnia.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Four or five slender jointed digits in humans and primates, attached to each HAND.
Abnormalities of motor function that are associated with organic and non-organic cognitive disorders.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
The process in which specialized SENSORY RECEPTOR CELLS transduce peripheral stimuli (physical or chemical) into NERVE IMPULSES which are then transmitted to the various sensory centers in the CENTRAL NERVOUS SYSTEM.
Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS).
The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness.
A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.
Automatic, mechanical, and apparently undirected behavior which is outside of conscious control.
The measurement of magnetic fields over the head generated by electric currents in the brain. As in any electrical conductor, electric fields in the brain are accompanied by orthogonal magnetic fields. The measurement of these fields provides information about the localization of brain activity which is complementary to that provided by ELECTROENCEPHALOGRAPHY. Magnetoencephalography may be used alone or together with electroencephalography, for measurement of spontaneous or evoked activity, and for research or clinical purposes.
Loss of a limb or other bodily appendage by accidental injury.
A learning situation involving more than one alternative from which a selection is made in order to attain a specific goal.
A disturbance in the normal fluency and time patterning of speech that is inappropriate for the individual's age. This disturbance is characterized by frequent repetitions or prolongations of sounds or syllables. Various other types of speech dysfluencies may also be involved including interjections, broken words, audible or silent blocking, circumlocutions, words produced with an excess of physical tension, and monosyllabic whole word repetitions. Stuttering may occur as a developmental condition in childhood or as an acquired disorder which may be associated with BRAIN INFARCTIONS and other BRAIN DISEASES. (From DSM-IV, 1994)
The sensory interpretation of the dimensions of objects.
A histamine H1 antagonist used in allergic reactions, hay fever, rhinitis, urticaria, and asthma. It has also been used in veterinary applications. One of the most widely used of the classical antihistaminics, it generally causes less drowsiness and sedation than PROMETHAZINE.
Lists of words to which individuals are asked to respond ascertaining the conceptual meaning held by the individual.
Application of computer programs designed to assist the physician in solving a diagnostic problem.
Syndromes which feature DYSKINESIAS as a cardinal manifestation of the disease process. Included in this category are degenerative, hereditary, post-infectious, medication-induced, post-inflammatory, and post-traumatic conditions.
A benzodiazepine derivative used mainly as a hypnotic.
The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
Agents that alleviate ANXIETY, tension, and ANXIETY DISORDERS, promote sedation, and have a calming effect without affecting clarity of consciousness or neurologic conditions. ADRENERGIC BETA-ANTAGONISTS are commonly used in the symptomatic treatment of anxiety but are not included here.
Inorganic compounds that contain chlorine as an integral part of the molecule.
The ability to learn and to deal with new situations and to deal effectively with tasks involving abstractions.
An inhibitor of glutamate decarboxylase and an antagonist of GAMMA-AMINOBUTYRIC ACID. It is used to induce convulsions in experimental animals.
Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits.
Brain waves characterized by a frequency of 4-7 Hz, usually observed in the temporal lobes when the individual is awake, but relaxed and sleepy.
A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.
A plant genus of the family LAMIACEAE that is the source of peppermint oil.
Methods and procedures for recording EYE MOVEMENTS.
Any situation where an animal or human is trained to respond differentially to two stimuli (e.g., approach and avoidance) under reward and punishment conditions and subsequently trained under reversed reward values (i.e., the approach which was previously rewarded is punished and vice versa).
Nicotine is highly toxic alkaloid. It is the prototypical agonist at nicotinic cholinergic receptors where it dramatically stimulates neurons and ultimately blocks synaptic transmission. Nicotine is also important medically because of its presence in tobacco smoke.
The relationship between the dose of an administered drug and the response of the organism to the drug.
Falls due to slipping or tripping which may result in injury.
The process whereby a representation of past experience is elicited.
A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.
A verbal or nonverbal means of communicating ideas or feelings.
The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The principle that items experienced together enter into a connection, so that one tends to reinstate the other.
Elongated gray mass of the neostriatum located adjacent to the lateral ventricle of the brain.
Act of eliciting a response from a person or organism through physical contact.
A change in electrical resistance of the skin, occurring in emotion and in certain other conditions.
Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
An outbred strain of rats developed in 1915 by crossing several Wistar Institute white females with a wild gray male. Inbred strains have been derived from this original outbred strain, including Long-Evans cinnamon rats (RATS, INBRED LEC) and Otsuka-Long-Evans-Tokushima Fatty rats (RATS, INBRED OLETF), which are models for Wilson's disease and non-insulin dependent diabetes mellitus, respectively.
A loosely defined group of drugs that tend to increase behavioral alertness, agitation, or excitation. They work by a variety of mechanisms, but usually not by direct excitation of neurons. The many drugs that have such actions as side effects to their main therapeutic use are not included here.
The analysis of a critical number of sensory stimuli or facts (the pattern) by physiological processes such as vision (PATTERN RECOGNITION, VISUAL), touch, or hearing.
Wave-like oscillations of electric potential between parts of the brain recorded by EEG.
The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.
A form of SILICON DIOXIDE composed of skeletons of prehistoric aquatic plants which is used for its ABSORPTION quality, taking up 1.5-4 times its weight in water. The microscopic sharp edges are useful for insect control but can also be an inhalation hazard. It has been used in baked goods and animal feed. Kieselguhr is German for flint + earthy sediment.
A genus of the subfamily CERCOPITHECINAE, family CERCOPITHECIDAE, consisting of 16 species inhabiting forests of Africa, Asia, and the islands of Borneo, Philippines, and Celebes.
Injuries incurred during participation in competitive or non-competitive sports.
The anterior pair of the quadrigeminal bodies which coordinate the general behavioral orienting responses to visual stimuli, such as whole-body turning, and reaching.
The state or process hypothesized to account for poorer learning rate for elements later in a series as compared to the learning rate for elements coming earlier in a series.
Brain waves with frequency between 15-30 Hz seen on EEG during wakefulness and mental activity.
Sensation of making physical contact with objects, animate or inanimate. Tactile stimuli are detected by MECHANORECEPTORS in the skin and mucous membranes.
Disorders in which the symptoms are distressing to the individual and recognized by him or her as being unacceptable. Social relationships may be greatly affected but usually remain within acceptable limits. The disturbance is relatively enduring or recurrent without treatment.
A cognitive disorder characterized by an impaired ability to comprehend written and printed words or phrases despite intact vision. This condition may be developmental or acquired. Developmental dyslexia is marked by reading achievement that falls substantially below that expected given the individual's chronological age, measured intelligence, and age-appropriate education. The disturbance in reading significantly interferes with academic achievement or with activities of daily living that require reading skills. (From DSM-IV)
The d-form of AMPHETAMINE. It is a central nervous system stimulant and a sympathomimetic. It has also been used in the treatment of narcolepsy and of attention deficit disorders and hyperactivity in children. Dextroamphetamine has multiple mechanisms of action including blocking uptake of adrenergics and dopamine, stimulating release of monamines, and inhibiting monoamine oxidase. It is also a drug of abuse and a psychotomimetic.
Striped GRAY MATTER and WHITE MATTER consisting of the NEOSTRIATUM and paleostriatum (GLOBUS PALLIDUS). It is located in front of and lateral to the THALAMUS in each cerebral hemisphere. The gray substance is made up of the CAUDATE NUCLEUS and the lentiform nucleus (the latter consisting of the GLOBUS PALLIDUS and PUTAMEN). The WHITE MATTER is the INTERNAL CAPSULE.

Competitive mechanisms subserve attention in macaque areas V2 and V4. (1/13264)

It is well established that attention modulates visual processing in extrastriate cortex. However, the underlying neural mechanisms are unknown. A consistent observation is that attention has its greatest impact on neuronal responses when multiple stimuli appear together within a cell's receptive field. One way to explain this is to assume that multiple stimuli activate competing populations of neurons and that attention biases this competition in favor of the attended stimulus. In the absence of competing stimuli, there is no competition to be resolved. Accordingly, attention has a more limited effect on the neuronal response to a single stimulus. To test this interpretation, we measured the responses of neurons in macaque areas V2 and V4 using a behavioral paradigm that allowed us to isolate automatic sensory processing mechanisms from attentional effects. First, we measured each cell's response to a single stimulus presented alone inside the receptive field or paired with a second receptive field stimulus, while the monkey attended to a location outside the receptive field. Adding the second stimulus typically caused the neuron's response to move toward the response that was elicited by the second stimulus alone. Then, we directed the monkey's attention to one element of the pair. This drove the neuron's response toward the response elicited when the attended stimulus appeared alone. These findings are consistent with the idea that attention biases competitive interactions among neurons, causing them to respond primarily to the attended stimulus. A quantitative neural model of attention is proposed to account for these results.  (+info)

Cerebellar Purkinje cell simple spike discharge encodes movement velocity in primates during visuomotor arm tracking. (2/13264)

Pathophysiological, lesion, and electrophysiological studies suggest that the cerebellar cortex is important for controlling the direction and speed of movement. The relationship of cerebellar Purkinje cell discharge to the control of arm movement parameters, however, remains unclear. The goal of this study was to examine how movement direction and speed and their interaction-velocity-modulate Purkinje cell simple spike discharge in an arm movement task in which direction and speed were independently controlled. The simple spike discharge of 154 Purkinje cells was recorded in two monkeys during the performance of two visuomotor tasks that required the animals to track targets that moved in one of eight directions and at one of four speeds. Single-parameter regression analyses revealed that a large proportion of cells had discharge modulation related to movement direction and speed. Most cells with significant directional tuning, however, were modulated at one speed, and most cells with speed-related discharge were modulated along one direction; this suggested that the patterns of simple spike discharge were not adequately described by single-parameter models. Therefore, a regression surface was fitted to the data, which showed that the discharge could be tuned to specific direction-speed combinations (preferred velocities). The overall variability in simple spike discharge was well described by the surface model, and the velocities corresponding to maximal and minimal discharge rates were distributed uniformly throughout the workspace. Simple spike discharge therefore appears to integrate information about both the direction and speed of arm movements, thereby encoding movement velocity.  (+info)

Spinal cord-evoked potentials and muscle responses evoked by transcranial magnetic stimulation in 10 awake human subjects. (3/13264)

Transcranial magnetic stimulation (TCMS) causes leg muscle contractions, but the neural structures in the brain that are activated by TCMS and their relationship to these leg muscle responses are not clearly understood. To elucidate this, we concomitantly recorded leg muscle responses and thoracic spinal cord-evoked potentials (SCEPs) after TCMS for the first time in 10 awake, neurologically intact human subjects. In this report we provide evidence of direct and indirect activation of corticospinal neurons after TCMS. In three subjects, SCEP threshold (T) stimulus intensities recruited both the D wave (direct activation of corticospinal neurons) and the first I wave (I1, indirect activation of corticospinal neurons). In one subject, the D, I1, and I2 waves were recruited simultaneously, and in another subject, the I1 and I2 waves were recruited simultaneously. In the remaining five subjects, only the I1 wave was recruited first. More waves were recruited as the stimulus intensity increased. The presence of D and I waves in all subjects at low stimulus intensities verified that TCMS directly and indirectly activated corticospinal neurons supplying the lower extremities. Leg muscle responses were usually contingent on the SCEP containing at least four waves (D, I1, I2, and I3).  (+info)

Augmentation is a potentiation of the exocytotic process. (4/13264)

Short-term synaptic enhancement is caused by an increase in the probability with which synaptic terminals release transmitter in response to presynaptic action potentials. Since exocytosed vesicles are drawn from a readily releasable pool of packaged transmitter, enhancement must result either from an increase in the size of the pool or an elevation in the fraction of releasable vesicles that undergoes exocytosis with each action potential. We show here that at least one major component of enhancement, augmentation, is not caused by an increase in the size of the readily releasable pool but is instead associated with an increase in the efficiency with which action potentials induce the exocytosis of readily releasable vesicles.  (+info)

Multiple point electrical stimulation of ulnar and median nerves. (5/13264)

A computer-assisted method of isolating single motor units (MUs) by multiple point stimulation (MPS) of peripheral nerves is described. MPS was used to isolate 10-30 single MUs from thenar and hypothenar muscles of normal subjects and patients with entrapment neuropathies, with the original purpose of obtaining a more representative mean motor unit potential for estimating the number of MUs in a muscle. The two important results that evolved from MPS however, were: (1) in the absence of 'alternation' MUs were recruited in an orderly pattern from small to large, and from longer to shorter latencies by graded electrical stimulation in both normal and pathological cases, (2) a comparison of the sizes of MUs recruited by stimulation proximal and distal to the elbow suggested that axonal branching can occur in the forearm 200 mm or more proximal to the motor point in intrinsic hand muscles.  (+info)

Electrophysiological evidence for tetrodotoxin-resistant sodium channels in slowly conducting dural sensory fibers. (6/13264)

A tetrodotoxin (TTX)-resistant sodium channel was recently identified that is expressed only in small diameter neurons of peripheral sensory ganglia. The peripheral axons of sensory neurons appear to lack this channel, but its presence has not been investigated in peripheral nerve endings, the site of sensory transduction in vivo. We investigated the effect of TTX on mechanoresponsiveness in nerve endings of sensory neurons that innervate the intracranial dura. Because the degree of TTX resistance of axonal branches could potentially be affected by factors other than channel subtype, the neurons were also tested for sensitivity to lidocaine, which blocks both TTX-sensitive and TTX-resistant sodium channels. Single-unit activity was recorded from dural afferent neurons in the trigeminal ganglion of urethan-anesthetized rats. Response thresholds to mechanical stimulation of the dura were determined with von Frey monofilaments while exposing the dura to progressively increasing concentrations of TTX or lidocaine. Neurons with slowly conducting axons were relatively resistant to TTX. Application of 1 microM TTX produced complete suppression of mechanoresponsiveness in all (11/11) fast A-delta units [conduction velocity (c.v.) 5-18 m/s] but only 50% (5/10) of slow A-delta units (1.5 +info)

Source of inappropriate receptive fields in cortical somatotopic maps from rats that sustained neonatal forelimb removal. (7/13264)

Previously this laboratory demonstrated that forelimb removal at birth in rats results in the invasion of the cuneate nucleus by sciatic nerve axons and the development of cuneothalamic cells with receptive fields that include both the forelimb-stump and the hindlimb. However, unit-cluster recordings from primary somatosensory cortex (SI) of these animals revealed few sites in the forelimb-stump representation where responses to hindlimb stimulation also could be recorded. Recently we reported that hindlimb inputs to the SI forelimb-stump representation are suppressed functionally in neonatally amputated rats and that GABAergic inhibition is involved in this process. The present study was undertaken to assess the role that intracortical projections from the SI hindlimb representation may play in the functional reorganization of the SI forelimb-stump field in these animals. The SI forelimb-stump representation was mapped during gamma-aminobutyric acid (GABA)-receptor blockade, both before and after electrolytic destruction of the SI hindlimb representation. Analysis of eight amputated rats showed that 75.8% of 264 stump recording sites possessed hindlimb receptive fields before destruction of the SI hindlimb. After the lesions, significantly fewer sites (13.2% of 197) were responsive to hindlimb stimulation (P < 0.0001). Electrolytic destruction of the SI lower-jaw representation in four additional control rats with neonatal forelimb amputation did not significantly reduce the percentage of hindlimb-responsive sites in the SI stump field during GABA-receptor blockade (P = 0.98). Similar results were obtained from three manipulated rats in which the SI hindlimb representation was silenced temporarily with a local cobalt chloride injection. Analysis of response latencies to sciatic nerve stimulation in the hindlimb and forelimb-stump representations suggested that the intracortical pathway(s) mediating the hindlimb responses in the forelimb-stump field may be polysynaptic. The mean latency to sciatic nerve stimulation at responsive sites in the GABA-receptor blocked SI stump representation of neonatally amputated rats was significantly longer than that for recording sites in the hindlimb representation [26.3 +/- 8.1 (SD) ms vs. 10.8 +/- 2.4 ms, respectively, P < 0.0001]. These results suggest that hindlimb input to the SI forelimb-stump representation detected in GABA-blocked cortices of neonatally forelimb amputated rats originates primarily from the SI hindlimb representation.  (+info)

Corticofugal amplification of facilitative auditory responses of subcortical combination-sensitive neurons in the mustached bat. (8/13264)

Recent studies on the bat's auditory system indicate that the corticofugal system mediates a highly focused positive feedback to physiologically "matched" subcortical neurons, and widespread lateral inhibition to physiologically "unmatched" subcortical neurons, to adjust and improve information processing. These findings have solved the controversy in physiological data, accumulated since 1962, of corticofugal effects on subcortical auditory neurons: inhibitory, excitatory, or both (an inhibitory effect is much more frequent than an excitatory effect). In the mustached bat, Pteronotus parnellii parnellii, the inferior colliculus, medial geniculate body, and auditory cortex each have "FM-FM" neurons, which are "combination-sensitive" and are tuned to specific time delays (echo delays) of echo FM components from the FM components of an emitted biosonar pulse. FM-FM neurons are more complex in response properties than cortical neurons which primarily respond to single tones. In the present study, we found that inactivation of the entire FM-FM area in the cortex, including neurons both physiologically matched and unmatched with subcortical FM-FM neurons, on the average reduced the facilitative responses to paired FM sounds by 82% for thalamic FM-FM neurons and by 66% for collicular FM-FM neurons. The corticofugal influence on the facilitative responses of subcortical combination-sensitive neurons is much larger than that on the excitatory responses of subcortical neurons primarily responding to single tones. Therefore we propose the hypothesis that, in general, the processing of complex sounds by combination-sensitive neurons more heavily depends on the corticofugal system than that by single-tone sensitive neurons.  (+info)

Tasks of attention and impulse control in humans have excellent rodent counterparts. In particular, the 5-choice serial reaction time task (5CSRTT), which is the most widely used task measuring impulsive action and attention performance, has been instrumental in defining the underlying neuroanatomy, neurochemistry and genes pertaining to these cognitive functions.. In the 5CSRTT, mice are required to respond to a brief light stimulus in one of five response apertures. The number of premature responses before the stimulus light switches on is a measure of impulsivity. Omissions of responding, accuracy of responding and the intra-individual variability in response latencies are measures of attention.. ...
In. order to evaluate the effects of number and method of visual stimuli on simple reaction time and determine the proper number of trials, simple reaction time of the computerized test of NTOS (Neurobehavioral Test for Occupational Screening) was carried out on 240 medical students. The prominent difference was found between male and female on simple reaction time. Regarding the effect of number based on the parameters of measures and the purpose of test itself, 64 trials was considered as proper number. The mean reaction time was different according to the methods of visual stimuli, such as color and size( ...
In cognitive psychology, the Eriksen Flanker Task is a set of response inhibition tests used to assess the ability to suppress responses that are inappropriate in a particular context. The target is flanked by non-target stimuli which correspond either to the same directional response as the target (congruent flankers), to the opposite response (incongruent flankers), or to neither (neutral flankers). The task is named for Barbara. A. Eriksen & Charles W. Eriksen, who first published the task in 1974, and also for the flanker stimuli that surround the target. In the tests, a directional response (usually left or right) is assigned to a central target stimulus. Various forms of the task are used to measure information processing and selective attention. In an Eriksen Flanker Task there are three types of stimuli used: Congruent stimulus- Flankers call for the same response as the target, and may appear identical. Also referred to as the compatible condition. Incongruent stimulus- Flanker items ...
TY - JOUR. T1 - Slowed reaction time performance on a divided attention task in elderly with environmental chemical odor intolerance. AU - Bell, Iris R.. AU - Wyatt, James K.. AU - Bootzin, Richard R.. AU - Schwartz, Gary E.. N1 - Funding Information: Correspondence to: Dr. Iris Bell, Department of Psychiatry, Tucson Veterans Affairs Medical Center, 3601 S. Sixth Avenue, MS 116A. Tucson, AZ 85723, USA. This research was supported by a grant from the National Dairy Board administered in cooperation with the National Dairy Council. *Current Address: Section on Sleep DisordersICircadianM edicine, Harvard Medical School and Brigham & Womens Hospital, Boston, MA USA.. PY - 1996. Y1 - 1996. N2 - Previous research has suggested an association between the subjective report of illness from environmental chemical odors and poorer cognitive task performance in persons with industrial levels of xenobiotic exposures. The present study investigated baseline morning performance on a computerized divided ...
0008]Scientists define at least three types of reaction time including simple reaction time, recognition (or Go/No Go) reaction time, and choice reaction time. Simple reaction time (SRT) is the reaction time obtained when the subject has to respond in a similar way to the same stimulus. In one example, one could obtain a simple reaction time by simply dropping an object at random intervals and asking the subject to catch it each time as quickly as possible. The time taken to catch the object from when it was dropped is the SRT. No decision-making is involved by the subject. Recognition reaction time (RRT) is the reaction time obtained when the subject recognizes the presence/absence of a stimulus at the time the object is dropped and takes the appropriate action as quickly as possible. So in one example, the subject will have been asked to catch the object that is dropped using a pinch grip if a light comes on, but to let it drop if the light does not come on. Here the stimulus to catch the ...
Age & gender is found to affect reaction time. In infancy the reaction time is found to be longer that shortens in 20s and again goes on increasing in 50s and 60s.The lengthening is accelerated after 70s and thereafter. With age recognition and choice reaction time both are affected. It is seen that males have faster reaction time than females. This disadvantage in females is not reduced by practice. The explanation given by many studies for this gender difference was that, men were more into sports and have strong musculoskeletal mass than females. Many studies in recent times have found that male advantage of visual reaction time being shorter is reducing now as women are more into sports and their participation in driving and fast action sports is increasing. Mean reaction time in males was found to be 220ms and in females it was 260ms .For sound stimuli in males mean reaction time was 190 ms and females had 200ms. Another interesting finding noticed in many studies is age related ...
We develop a general theory of reaction time ({RT}) distributions in psychological experiments, deriving from the distribution of the quotient of two normal random variables, that of the task difficulty (top-down information), and that of the external evidence that becomes available to solve it (bottom-up information). The theory is capable of accounting for results from a variety of models of reaction time distributions and it makes novel predictions. It provides a unified account of known changes in the shape of the distributions depending on properties of the task and of the participants, and it predicts additional changes that should be observed. We show that a number of known properties of {RT} distributions are homogeneously accounted for by variations in the value of two easily interpretable parameters, the coefficients of variation of the two normal variables. The predictions of the theory are compared with those of many families of distributions that have been proposed to account for ...
TY - JOUR. T1 - Assessment of pedophilic sexual interest with an attentional choice reaction time task. AU - Mokros, A. AU - Dombert, B. AU - Osterheider, M. AU - Zappalà, A. AU - Santtila, Pekka. PY - 2010. Y1 - 2010. U2 - 10.1007/s10508-009-9530-6. DO - 10.1007/s10508-009-9530-6. M3 - Artikel. VL - 39. SP - 1081. EP - 1090. JO - Archives of Sexual Behavior. JF - Archives of Sexual Behavior. SN - 0004-0002. IS - 5. ER - ...
This bibliography includes abstracts of 59 studies and review articles which are related to the effect of color coding on choice reaction time. As color displays become more widely used for information gathering and decision-making tasks, the effect of color coding on these tasks and their components will become increasingly important design considerations. Choice reaction time, the time required to make a binary choice, affects the total execution time of many decision-making and information gathering tasks, and seems to be a particularly relevant measure of effectiveness of color coding. This bibliography draws together much of the current literature, for reference by human factors researchers and systems designers. Two techniques lend themselves to measurement of choice reaction time the Sternberg paradigm and the Within-Task Subtractive Method.
Because of universal interest in this field and because many varying opinions are indicated, the problem is to find out, by some systematic inquiry, as to the nature of the relationship between motor reaction time and ability to play football at the high school level.
Compared to adults, children have longer simple reaction time (SRT) and choice reaction time (CRT) to simple and choice visual stimuli. Based on the available data, it can be concluded that this occurrence could be due to correlation between age and the information processing speed. Other factors may have an impact, too, such as the shorter attention span which children may have. Some studies indicate that karate favors the development of cognitive functions, including the RT. Therefore, the aim of the current study was to determine whether there is a difference in simple and choice reaction time between boys and girls of preadolescent and early adolescent age on the basic and premastery level of karate training. Testing involved 78 participants divided into four subgroups, in accordance with the gender and the level of training, using a custom designed RT measuring software, developed in LabVIEW 2012 software package. A two-way analysis of variance (Two-way ANOVA) confirmed no differences ...
Performance in a reaction time task can be strongly influenced by the physical properties of the stimuli used (e.g., position and intensity). The reduction in reaction time observed with higher-intensity visual stimuli has been suggested to arise from reduced processing time along the visual pathway. If this hypothesis is correct, activity should be registered in neurons sooner for higher-intensity stimuli. We evaluated this hypothesis by measuring the onset of neural activity in the intermediate layers of the superior colliculus while monkeys generated saccades to high or low-intensity visual stimuli. When stimulus intensity was high, the response onset latency was significantly reduced compared to low-intensity stimuli. As a result, the minimum time for visually triggered saccades was reduced, accounting for the shorter saccadic reaction times (SRTs) observed following high-intensity stimuli. Our results establish a link between changes in neural activity related to stimulus intensity and changes to
Assessment and intervention tools for occupational therapy practice must be evidence-based for appropriate use and include normative data with healthy adults. The overall goal of this research was to collect normative data on healthy adults visual reaction time when completing the full field 60 light task on a novel device, the Vision Coach. The specific research question in this study was to determine if a change in body positioning in regards to persons base of support will affect a persons reaction time. We hypothesized that reaction times would be significantly different in the positions of standing versus sitting. Reaction times from 121 healthy adults, ages ranging from 21-79 years, were collected. Participants completed eight trials total, four trials in a standing position, and four trials in a sitting position. There were no significant differences on the factors of body position, gender, height, and wingspan on the averaged visual reaction times. The implication is that clients can ...
MONDAY, Dec. 12, 2016 (HealthDay News) - For anesthesiologists, reaction time increases after a night call, with greater increases seen in correlation with reliance on avoidance as a coping mechanism, according to a study published online Nov. 30 in Pediatric Anesthesia.. Haleh Saadat, M.D., from the Nationwide Childrens Hospital in Columbus, and colleagues examined the impact of sleep deprivation on reaction time in 23 anesthesiologists after an overnight call or regular working hours. Reaction time was assessed using the psychomotor vigilance test on a regular non-call day and after a 17-hour in-house call. Two anesthesiologists ended their participation for personal reasons.. The researchers found that, compared with a regular day, post-call psychomotor vigilance test mean reaction time decreased by an average of 31.2 ms. Coping Strategy Indicator scale scores indicated reliance on specific coping mechanisms, including problem solving, seeking social support, and avoidance. There was a ...
Familiar size is known to influence our perception of objects size and distance. In this study, we examined whether or not simple RTs (RTs) are also affected by prior knowledge of objects size. In a series of experiments, participants were asked to respond as quickly as possible to briefly presented images of familiar objects, equated for luminance and retinal size. The effects of familiar size and object animacy on RTs were investigated under natural (Experiment 1) and reduced (Experiment 2) viewing conditions. Restricted viewing conditions were introduced to manipulate the availability of depth cues. A systematic effect of familiar size on RTs was considered for progressively shrunken (Experiment 3) and enlarged (Experiment 4) objects on the screen with respect to their familiar size. Measures of perceived size were also taken by means of a manual estimation task (Experiment 5). Results showed an effect of animacy on simple RTs: Participants were faster to respond to images of animals ...
Two experiments examined phonological priming effects on reaction times, error rates, and event-related brain potential (ERP) measures in an auditory lexical decision task. In Experiment 1 related prime-target pairs rhymed, and in Experiment 2 they alliterated (i.e., shared the consonantal onset and vowel). Event-related potentials were recorded in a delayed response task. Reaction times and error rates were obtained both for the delayed and an immediate response task. The behavioral data of Experiment 1 provided evidence for phonological facilitation of word, but not of nonword decisions. The brain potentials were more negative to unrelated than to rhyming word-word pairs between 450 and 700 msec after target onset. This negative enhancement was not present for word-nonword pairs. Thus, the ERP results match the behavioral data. The behavioral data of Experiment 2 provided no evidence for phonological Facilitation. However, between 250 and 450 msec after target onset, i.e., considerably earlier ...
The purpose of this study was to investigate the difference in the reaction time responses of an athlete based on various types of stimuli.
The latent period of visual sensor motor reaction depends, in part, on the sensory and integrative processes in the brain, but is also influenced by the rate of the muscle contraction. There is no clear evidence in the literature whether the rotational inertia of segments of limbs has any direct effect on the reaction time. The aim of our study was to identify this relationship . The study involved 566 right handed students aged 16-17 of both genders beginning their post puberty period. Reaction time was measured during experimental adduction of the forearm and hand, using a special rotating handle and lever connected to a computer that recorded the reaction time (~1 ms). Calculations of the rotational inertia were carried out using regression models by Zatsiorsky and other authors. Each gender group was divided into three subgroups: with high, medium and low values of rotational inertia. It was found that individuals with high values of rotational inertia of forearm and wrist demonstrated ...
Spatial congruence (Simon) effects on reaction time (RT) and response force (RF) were studied in two experiments requiring speeded choice responses to the color of a stimulus located irrelevantly to the left or right of fixation. In Experiment 1 with unimanual responses, both RT and incorrect-hand RF were sensitive to spatial congruence, and both showed larger Simon effects following a congruent trial than following an incongruent one. RT and incorrect-hand RF were dissociated in distributional (i.e., delta plot) analyses, however. As in previous studies, the Simon effect on RT was largest for the fastest responses and diminished as RT increased (i.e., decreasing delta plot). In contrast, Simon effects on RF did not decrease for slower responses; if anything, they increased slightly. In Experiment 2 participants made bimanual responses, allowing measurement of the spatial congruence effect for each trial. Responses were both faster and more forceful with the spatially congruent hand than with the
With MOART you can employ simple reaction time tasks such as Go / No Go tasks for the study of higher centers of the brain, and more complex discriminate reaction time tasks to study cognitive processing. Includes MOART Panel Only.
A LITERATURE REVIEW ON REACTION TIME BY ROBERT J KOSINSKI - Quaterly Journal of Experimental Psychology 4: Maria Pereverzeva , Wendy Bromfield Journal of vision However, after the stimulus gets to a certain
Initiating an eye movement towards a suddenly appearing visual target is faster when an accessory auditory stimulus occurs in close spatiotemporal vicinity. Such facilitation of saccadic reaction time (SRT) is well-documented, but the exact neural mechanisms underlying the crossmodal effect remain to be elucidated. From EEG/MEG studies it has been hypothesized that coupled oscillatory activity in primary sensory cortices regulates multisensory processing. Specifically, it is assumed that the phase of an ongoing neural oscillation is shifted due to the occurrence of a sensory stimulus so that, across trials, phase values become highly consistent (phase reset). If one can identify the phase an oscillation is reset to, it is possible to predict when temporal windows of high and low excitability will occur. However, in behavioral experiments the pre-stimulus phase will be different on successive repetitions of the experimental trial, and average performance over many trials will show no signs of the
Initiating an eye movement towards a suddenly appearing visual target is faster when an accessory auditory stimulus occurs in close spatiotemporal vicinity. Such facilitation of saccadic reaction time (SRT) is well-documented, but the exact neural mechanisms underlying the crossmodal effect remain to be elucidated. From EEG/MEG studies it has been hypothesized that coupled oscillatory activity in primary sensory cortices regulates multisensory processing. Specifically, it is assumed that the phase of an ongoing neural oscillation is shifted due to the occurrence of a sensory stimulus so that, across trials, phase values become highly consistent (phase reset). If one can identify the phase an oscillation is reset to, it is possible to predict when temporal windows of high and low excitability will occur. However, in behavioral experiments the pre-stimulus phase will be different on successive repetitions of the experimental trial, and average performance over many trials will show no signs of the
Nacionales 1 min atrás 1 Reaction Time, Exercise, and Neural Plasticity Overview A reaction involves the brain. Stay sharp. Reaction time is the interval time between the presentation of a stimulus and the initiation of the muscular response to that stimulus. A great exercise for goalies and defense in general is to toss the reaction ball high in the air, and when the reaction ball hits, try to jump in the same direction as the Reaction Ball. Effect of acute exercise on clinically measured reaction time in collegiate athletes. We surveyed 2,000 people aged 18 and above and asked them to play the game. Formulate and test hypotheses regarding reaction times.Introduction: Reaction time is a measure of how quickly an organism can respond to a particular stimulus.Reaction time has been widely studied, as its practical implications may be of great consequence, e.g. Med Sci Sports Exerc. A great exercise for goalies and defense in general is to toss the reaction ball high in the air, and when the ...
This project is designed to develop an objective test to identify sleepiness in people with jobs where errors can be dangerous; for example, factory workers, pilots, or soldiers. My role in the project was to collect and analyze data from cognitive tests to search for factors associated with sleepiness. I tested for correlations between a variety of factors in several tests, including the PVT (Psychomotor Vigilance Task, testing reaction time) and the LOT (Line Orientation Test, testing the subjects spatial orientation skills). So far, I have considered: correlations between two metrics in the same test (ex: errors on a test vs mean reaction time on the same test), differences between subjects of different genders, differences based on cognitive test order, and whether there is a learning effect over the course of the study. The LOT seems shows inconsistent effects in different metrics over the course of the study, and requires further analyses. The PVT does not demonstrate any learning effect.
The integration of stimuli from the same or different modalities offers many benefits such as enhanced discrimination and accelerated reaction to objects. This thesis investigates the effects of stimulis spatial location on the redundancy gain (RG) obtained with cross-modal and within-modal stimulations. The RG is a decrease in reaction times (RT) when two or more stimuli are presented simultaneously rather than a single stimulation. The first study investigated cross-modal visuo-tactile integration in a single reaction time task and a choice reaction time task. Each unisensory stimulus was presented to either the left or right hemispace, and multisensory stimuli were presented in a unilateral (e.g. visual right/tactile right) or bilateral configuration (e.g. visual right/tactile left). The first task was a simple reaction time (SRT) paradigm where participants had to responded to all stimulations, irrespective of spatial position. Results showed that multisensory gain and coactivation were the ...
Previous studies showed that anodal transcranial DC stimulation (tDCS) applied to the primary motor cortex of the affected hemisphere (M1affected hemisphere) after subcortical stroke transiently improves performance of complex tasks that mimic activities of daily living (ADL). It is not known if relatively simpler motor tasks are similarly affected. Here we tested the effects of tDCS on pinch force (PF) and simple reaction time (RT) tasks in patients with chronic stroke in a double-blind cross-over Sham-controlled experimental design. Hummel, Friedhelm C; Voller, Bernhard; Celnik, Pablo; Floel, Agnes; Giraux, Pascal; Gerloff, Christian; Cohen, Leonardo G
Hi sir, i really need the inquisit script for 4choiceRT. im not really good at coding, could you please send a version of the script without the simple RT and the typing test. hope you can help, Thanks a million. p/s-inquisit also ask me for password when i enter your script, hope you can share it. thanks.. ReplyDelete ...
Errors in speeded decision tasks are associated with characteristic patterns of brain activity. In the scalp-recorded EEG, error processing is reflected in two components, the error-related negativity (ERN) and the error positivity (Pe). These components have been widely studied, but debate remains regarding the precise aspects of error processing they reflect. The present study investigated the relation between the ERN and the Pe using a novel version of the flanker task to allow a comparison between errors reflecting different causes-response conflict versus stimulus masking. The conflict and mask conditions were matched for overall behavioural performance but differed in underlying response dynamics, as indexed by response time distributions and measures of lateralised motor activity. ERN amplitude varied in relation to these differing response dynamics, being significantly larger in the conflict condition compared to the mask condition. Furthermore, differences in response dynamics between
The isomerization of limonene over the Ti-SBA-15 catalyst, which was prepared by the hydrothermal method, was studied. The main products of limonene isomerization were terpinolene, α-terpinene, γ-terpinene, and p-cymene-products with numerous applications. The amount of these products depended on reaction time, temperature, and catalyst content. These parameters changed in the following range: reaction time 30-1380 min, temperature 140-160 °C, and catalyst content 5-15 wt %. Finally, the most favorable conditions for the limonene isomerization process were established: a reaction time of 180 min, temperature of 160 °C, and amount of the catalyst 15 wt %. In order to obtain p-cymene (dehydroaromatization product), the most favorable conditions are similar but the reaction time should be 1380 min. The application of such conditions allowed us to obtain the highest amounts of the desired products in the shortest time.
View Notes - 03 reaction-time-and-motor-skills from CS 465 at University of Illinois, Urbana Champaign. Models of Choice Reaction Time & Motor Skills Brian Bailey Announcements • Homework1
A reaction time task used to measure the influence that relationships have on self-concept designed by Aaron et al (1991). Go back to Me/Not Me Reaction Time Task page ...
I have been tracking this for myself for a while. It shows some interesting trends. I track the following Average winning RT,Average Losing Reaction time, Average winning package, Average losing package. Al my numbers only use Non-Redlights rounds. 4 out of the last 5 years, my average losing reaction times are better than my average winning reaction times. But my average winning packages are always significantly better than my losing packages. This tell me that I drive the stripe alot better when I am behind on the tree. The way I race, I would rather be close to you on the tree and drive the stripe. I find that if I am too far ahead on the tree, I get myself in trouble on the big end. I also found my win% went up when I started shooting for a high teen lights vs 00. This change alot of those redlights turn into double 0 lights. Reaction time is just a piece of the puzzle, learn to tighten up that stripe, you lights dont have to be so stellar to go rounds. Despite what alot of people will tell ...
Here is a guy performing the reaction time test at the Smithsonian Institute in Washington, D.C.. It is not a well controlled test of reaction time, but there are not many videos of reaction time available!. ...
For an open source JavaScript/HTML/CSS solution, check out jsPsych: It can be used for reaction time measurement and interactive designs. An article describing the library was recently published in Behavior Research Methods.. A subsequent article investigated the properties of reaction time distributions collected with JavaScript compared to those collected with MATLAB and Psychtoolbox. The main result is that JavaScript was 10-40ms slower, but had equivalent variance across different experimental conditions and equal sensitivity to the experimental manipulation of set size in a visual search task.. There are several good answers to this related question about the validity and accuracy of response time measurements online. Many of those answers discuss findings that are relevant to JavaScript libraries like jsPsych.. de Leeuw, J. R. (2015). jsPsych: A JavaScript library for creating behavioral experiments in a Web browser. Behavior Research Methods, 47(1), 1-12.. de ...
For an open source JavaScript/HTML/CSS solution, check out jsPsych: It can be used for reaction time measurement and interactive designs. An article describing the library was recently published in Behavior Research Methods.. A subsequent article investigated the properties of reaction time distributions collected with JavaScript compared to those collected with MATLAB and Psychtoolbox. The main result is that JavaScript was 10-40ms slower, but had equivalent variance across different experimental conditions and equal sensitivity to the experimental manipulation of set size in a visual search task.. There are several good answers to this related question about the validity and accuracy of response time measurements online. Many of those answers discuss findings that are relevant to JavaScript libraries like jsPsych.. de Leeuw, J. R. (2015). jsPsych: A JavaScript library for creating behavioral experiments in a Web browser. Behavior Research Methods, 47(1), 1-12.. de ...
Mean response accuracy was 92% (SD: 5%) with mean false positive rate 6% (SD: 4%). Mean reaction time was 1579 ms (SD: 235 ms). After excluding 3 frontal EOG clusters comprising 240 ICs, the major (90 ms) lambda response peak in the fixation-onset locked ERPs was dominated by 3 occipital IC clusters (100 ICs, 92% of the peak scalp map accounted for) (Figure 1). ERPs time locked to saccade onsets contained a pre-saccadic spike peaking at -12 ms. Three far frontal clusters dominated this spike (260 ICs, 95% variance accounted) (Figure 2 left). However, after removing all 5 EOG and far frontal clusters (314 ICs) and 1 temporal scalp muscle (EMG) cluster (26 ICs), 4 posterior clusters (114 ICs) contributed 82% of the remaining (positive-going) pre-saccadic spike (Figure 2 right).. ...
This study hypothesized that reaction times to monaural auditory stimuli are shorter with the ipsilateral hand than with the contralateral hand under binaural white noise stimulation, and that ipsi- and contralateral reactions do not differ in the absence of white noise. The relationship between the ipsilateral-contralateral reaction time difference and the frequency of the reaction signal was also determined. In experiment I, 10 male undergraduate students each performed 20 ipsilateral and 20 contralateral reactions to each of 6 signal frequencies (400, 800,1200,1600, 2000, 2400 cps) under binaural white noise stimulation. In experiment II, 10 male undergraduate students each performed 20 ipsi- and 20 contralateral reactions, at one stimulus frequency, under white noise on and white noise off conditions. The results support both hypotheses ( p | .001), and also indicate that signal frequency has a significant effect on contralateral reactions· ( p | .001) but not on ipsilateral reactions. Close
When exposed to a regular sequence, people learn to exploit its predictable structure. There have been two major ways of thinking about learning
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Visual Reaction Time Nervous responses to environmental stimuli are necessarily rapid events, taking a small fraction of a second to be completed. The stages in such a response involve: (1) transduction of the environmental stimulus into a nervous impulse (rods and cones) (2) processing in the neurons of the retina (bipolar and ganglion cells) (3)…
Reaction time expert Marc Green says that our cognitive load is partially to blame for slow reaction time when driving. According to his studies, drivers dont break as quickly when they split their focus between driving and something else. Perhaps they are distracted by something else on the road or perhaps theyre preoccupied with other thoughts. Green says that navigation devices and cell phones also add to drivers cognitive load. He says, There is no doubt that both cause delays in reaction times, with estimates ranging from 0.3 to as high a second or more, depending on the circumstances. Try limiting your phone use and minimizing other distractions while driving to improve your driving reaction time.. ...
TY - JOUR. T1 - Catch the ruler: concurrent validity and test-retest reliability of the ReacStick measures of reaction time and inhibitory executive function in older people. AU - van Schooten, Kimberley S.. AU - Duran, Lionne. AU - Visschedijk, Maike. AU - Pijnappels, Mirjam. AU - Lord, Stephen R.. AU - Richardson, James. AU - Delbaere, Kim. PY - 2019/8. Y1 - 2019/8. N2 - Background: Reduced cognitive function, particularly executive function (EF), is associated with an increased risk of falling in older people. We evaluated the utility of the ReacStick test, a clinical test of reaction time, and inhibitory EF developed, for young athletes, for fall-risk assessment in older people. Aims: To evaluate the psychometric properties of ReacStick measures of reaction time and executive functioning in healthy community-dwelling older people. Methods: 140 participants (aged 77 ± 5 years) underwent testing. Two test conditions-simple and inhibitory go/no-go-provided measures of reaction time, ...
The fallacy of affirming the consequent is connected with a tendency to seek evidence that confirms a hypothesis. Many scientists conduct their experiments under the assumption that their experimental paradigm is a legitimate extension of their hypothesis, and thus their results are used to confirm their beliefs. As an example, imagine a hypothesis that states that patients with bipolar disorder have reduced cognitive processing speed, and we do a reaction time test to measure this. Thus, a fallacious line of reasoning would be: if bipolar patients have reduced cognitive processing speed, then we will observe slower reaction time on a test. We observe a slower reaction time, and therefore bipolar patients have reduced cognitive processing speed. This would be affirming the consequent, because the observed outcome is assumed to be the result of the mechanism outlined in the hypothesis, but we cannot with certainty say that this is true. The results certainly suggests this possibility, and it may ...
Try this reaction time test! Push the click button as soon as you percieve that the bombs have exploded an see your Reaction Time!
Whats the upper range of reaction times for humans? We had to do a reaction time test in Biology today in which you dropped a ruler from a point into
Then draw a graph to record your results. Along the left side of the paper (the y axis) write the times from the reaction time chart in separate rows. Across the bottom of the paper (the x axis) write Trial 1, Trial 2, and Trial 3 in three separate columns. You will record each others reaction times on this graph to compare them when you finish testing ...
Liu, D.; Long, X.; Yan, C.; Wang, D.; Zuo, X.; Lv, Y.; Li, S.; Zou, Q.; Zhu, C.; He, Y. et al.; Li, Y.; Kiviniemi, V.; Zang, Y.: Spontaneous brain activity in motor system predicts simple reaction time performance several months later. 14th Annual Meeting of the Organization for Human Brain Mapping (HBM), Melbourne, Australia (2008 ...
Without a way to measure it and some hard data its pointless to try argue this.. , average human reaction time appears to be around 200 to 250 milliseconds. Reaction time tests are really contrived and its always a laughing point when theyre quoted in irrelevant context: We usually get cues that allow to anticipate events from distance. Especially in gaming and musical context. Ive seen how the 200-500 ms reaction time figures often quoted have been deviced and what it measures is the scenario that you are blind and deaf and suddenly your blindless is gone and you react to that singular and sudden event.. I already use a CRT and I can put it to 200 hz should I wish to, but that doesnt really tell anything about latencies. Reacting to game events is conceptually similar to a feedback loop in electronics, except that added latency increases the loop lenght while ability to anticipate (look-ahead) decreases it. In a game like TrackMania or many arcade style games, the intensity and ...
Reaction time is everything. Whether youre a mom making quick family decisions, a student looking to ace the next exam, or a busy professional, reaction time and mental aptitude determine whether you succeed or fail. One slight weakness, things can go bad fast, as was the case in the above photo. A routine doctors visit caused this patient to miss the brake as she pealed into the community parking lot, ultimately smashing through my wifes salon. Near the broken window, children usually sit patiently, waiting for Mom to get her highlights. On this occasion, that seat was empty. But a short lapse in reaction time could have drastically altered someones life forever. Life rarely gives second chances. And according to the latest research, the best way to insure that you dont have to rely on one is to get more REM sleep - Rapid Eye Movement sleep. Scientists at the University of Pennsylvania recently showed that many people today are not operating on all mental cylinders due to a lack of deep, ...
Reaction time research[edit]. Reaction time studies have shown that number-form synesthetes are faster to say which of two ... The reaction times for valid cues are smaller than invalid cues (words and arrows), but in synesthetes the response time ... Teucher, U.; Brang, D.; Ramachandran, V.; Coulson, D. (2010), "Spatial cueing in time-space synesthetes: An event-related brain ...
Decreasing reaction time[edit]. Responses to multiple simultaneous sensory stimuli can be faster than responses to the same ... Hershenson M (March 1962). "Reaction time as a measure of intersensory facilitation". J Exp Psychol. 63 (3): 289-93. doi: ... Further studies have analysed the reaction times of saccadic eye movements;[39] and more recently correlated these findings to ... also decreasing the reaction times. The improvement by crossmodal effect was found to be greater as the primary stimulus to be ...
System reaction times[edit]. The mark of a good passive entry system is that the user never hits the "wall". This happens when ... measuring the response time of 125 kHz LC circuit. *using a more complex modulation (i.e. quadrature amplitude modulation) ... measuring group delay time to detect illegal high values. *measuring third-order intercept point to detect illegal ...
Reaction Time. *Firepower. *Electronic Countermeasure and Environmental Immunity. *Continuous Availability. *Area Coverage ... The design of the first Aegis-equipped ships, the Ticonderoga-class cruisers, took time to develop. Throughout the project's ... as he was only 17 at the time. Meyer graduated from high school on May 23 as president of his class and valedictorian. In June ... ship promoted by Admiral Zumwalt to a nuclear strike cruiser displacing three times as much. The type of ship, cruiser or ...
Improved reaction time. • Increased muscle strength and delayed muscle fatigue. • Increased acceleration. • Increased alertness ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... it induces physical effects such as decreased reaction time, fatigue resistance, and increased muscle strength.[49] ... For example, (S)-amphetamine, commonly known as d-amphetamine or dextroamphetamine, displays five times greater psychostimulant ...
Weapon reaction time. 5 s. 3.5 s. 3.5 s Ready from the march. 10 s. 10 s. 10 s ... "Army Times. 2008-11-21. Retrieved 2009-02-09.. *^ "'Pakistan capable of shooting down US drones'". Sindh Today. 2008-11-25. ... "Khaleej Times. 2008-11-21. Archived from the original on 2011-06-08. Retrieved 2009-02-09.. ...
Improved reaction time. • Increased muscle strength and delayed muscle fatigue. • Increased acceleration. • Increased alertness ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... by improving muscle strength and endurance while decreasing reaction time and fatigue;[3][12][13] some examples of athletic ... Depletion of dopamine in healthy volunteers impairs timing, while amphetamine releases synaptic dopamine and speeds up timing. ...
Quick reaction time. Musical chairs is a game of elimination involving players, chairs, and music, with one fewer chair than ... It can also refer to a condition where people have to expend time searching for a resource, such as having to travel from one ...
Reaction time. The time between the presentation of a stimulus and an appropriate response can indicate differences between two ... For example, if in a search task the reaction times vary proportionally with the number of elements, then it is evident that ... A person could be presented with a phone number and be asked to recall it after some delay of time; then the accuracy of the ... Even if the technology to map out every neuron in the brain in real-time were available and it were known when each neuron ...
Lacayo, Richard (June 12, 1995). "Violent Reaction". Time. Archived from the original on April 22, 2008. Retrieved October 8, ... "Time's All-Time 100 Movies". As of September 2018, it is number 54 on Metacritic's list of all-time highest scores. The film ... "All-Time 100 Movies: Pulp Fiction (1994)". Time. February 12, 2005. Archived from the original on June 3, 2007. Retrieved May ... He recalls, "we ended up meeting and spending time together, and I liked him, so I was really happy when he asked me to be in ...
reaction time". The Journal of General Psychology. 16 (1): 39-82. doi:10.1080/00221309.1937.9917940. Crowmwell, R. L.; ... doi:10.1111/j.1939-0025.1937.tb05558.x. Zahn, T. P.; Shakow, D.; Rosenthal, D. (1961). "Reaction time in schizophrenic and ... He compared verbal and manual reaction times and associations in people with schizophrenia compared to normal subjects. Shakow ... Rodnick, Shakow (1940). "Set in the schizophrenic as measured by a composite reaction time index". American Journal of ...
Typical use is real-time reporting of suspicious events to administrators (for example via e-mail) and automatic reaction to ... Alert time series plot showing the number of incoming messages during given time period. ... long correlation time windows, that do not delay reporting. Architecture[edit]. ACARM-ng consists of 3 main elements: ... ACARM-ng (Alert Correlation, Assessment and Reaction Module - next generation) is an open source IDS/IPS system. ACARM-ng is an ...
The most common symptoms are fatigue, slower reaction times, indecision, disconnection from one's surroundings, and the ... Combat stress reaction is an acute reaction that includes a range of behaviors resulting from the stress of battle that ... This term can be applied to any stress reaction in the military unit environment. Many reactions look like symptoms of mental ... although any of these may commence as a combat stress reaction. The US Army uses the term/acronym COSR (Combat Stress Reaction ...
CS1 maint: discouraged parameter (link) Jacobs, Emma (4 December 2011). "Interview: Chain reaction". Financial Times. Retrieved ... In January 2016, Willingham was named one of The Sunday Times' '500 Most Influential people in Britain'. In 2017 Willingham ... CS1 maint: discouraged parameter (link) "London Cocktail Club". Time Out London. "Oxford Circus". London Cocktail Club. ... CS1 maint: discouraged parameter (link) "Britain's 500 most influential". The Sunday Times. 24 January 2016.(subscription ...
Short Reaction Time. High Hit Capability. Coordinated use with the Command and Control System. 8 km Range. 3 crew. Fire on-the- ...
... while improving reaction time. Amphetamine improves endurance and reaction time primarily through reuptake inhibition and ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Improved reaction time • Increased muscle strength and delayed muscle fatigue • Increased acceleration • Increased alertness ... Depletion of dopamine in healthy volunteers impairs timing, while amphetamine releases synaptic dopamine and speeds up timing. ...
Most studies, however, found improvements in reaction time. The ingestion of caffeine does not seem to affect long-term memory ... At normal doses, caffeine has variable effects on learning and memory, but it generally improves reaction time, wakefulness, ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Caffeine also improves power output and reduces time to completion in aerobic time trials, an effect positively (but not ...
... while improving reaction time. Amphetamine improves endurance and reaction time primarily through reuptake inhibition and ... It induces physical effects such as improved reaction time, fatigue resistance, and increased muscle strength. Larger doses of ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Krimen LI, Cota DJ (March 2011). "The Ritter Reaction". Organic Reactions. 17. p. 216. doi:10.1002/0471264180.or017.03. ISBN ...
Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Methylphenidate has also been shown to increase exercise performance in time to fatigue and time trial studies. Caffeine is the ... reaction time, acceleration, anaerobic exercise performance, power output at fixed levels of perceived exertion, and endurance ... Improved reaction time • Increased muscle strength and delayed muscle fatigue • Increased acceleration • Increased alertness ...
Reaction time in such a task is often measured by the total amount of time it takes to complete the task. Choice reaction time ... Reaction time (RT; sometimes referred to as "response time") is measured by the elapsed time between stimulus onset and an ... Models of choice reaction time are closely aligned with Hick's Law, which posits that average reaction times lengthen as a ... Welford, A. T. (1980). "Chapter 3: Choice Reaction Time: Basic Concepts". In Welford, A. T. (ed.). Reaction Times. London: ...
Why 200ms? Human reaction time. (reply 9050645)". Hacker News. Retrieved 9 May 2018. CS1 maint: discouraged parameter (link) ... Worse, over slow links, many such packets can be in transit at the same time, potentially leading to congestion collapse. ... Nagle considers delayed ACKs a "bad idea", since the application layer does not usually respond within the time window. For ... Applications that expect real-time responses and low latency can react poorly with Nagle's algorithm. Applications such as ...
Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Improved reaction time • Increased muscle strength and delayed muscle fatigue • Increased acceleration • Increased alertness ... At the time, Alles referred to the amphetamine compound as Benzedrine, a term derived from the name benzyl-methyl carbinamine. ... The reaction is allowed to stand until the ammonia evaporates. However, the Birch reduction is dangerous because the alkali ...
... while improving reaction time. Amphetamine improves endurance and reaction time primarily through reuptake inhibition and ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Improved reaction time • Increased muscle strength and delayed muscle fatigue • Increased acceleration • Increased alertness ... The condensation reaction occurs with loss of water: (S)-PhCH 2CH(CH 3)NH 2 + (S)-HOOCCH(NH 2)CH 2CH 2CH 2CH 2NH 2 → (S,S)-PhCH ...
... while improving reaction time. Amphetamine improves endurance and reaction time primarily through reuptake inhibition and ... At these doses, it induces physical effects such as a faster reaction time, fatigue resistance, and increased muscle strength. ... Amphetamines and caffeine are stimulants that increase alertness, improve focus, decrease reaction time, and delay fatigue, ... Improved reaction time • Increased muscle strength and delayed muscle fatigue • Increased acceleration • Increased alertness ...
"Chain Reaction". Radio Times (4322): 123. 8 February 2007. Retrieved 1 February 2019. "Chain Reaction - Series 3 - Jeremy Hardy ... "Grumpy Old Men". Radio Times (4198): 108. 2 September 2004. Retrieved 1 February 2019. "Mock the Week". Radio Times (4236): 74 ... "Comic to Comic". Radio Times (4298): 127. 17 August 2006. "The Unbelievable Truth". Radio Times (4306): 133. 12 October 2006. ... It was edited by his wife Katie Barlow and his long-time radio producer David Tyler. Hardy was a committed socialist, and a ...
at time t. {\displaystyle t}. , and. *. τ. {\displaystyle \tau }. is the apparent reaction time, a constant for all vehicles.[3 ... is equal to half of the reaction time, τ. /. 2. {\displaystyle \tau /2}. , and the driver is willing to brake hard, a model ... at time *. t. {\displaystyle t}. ,. *. v. n. (. t. ). {\displaystyle v_{n}(t)}. is the speed of vehicle n. {\displaystyle n}. ... Gipps (1981) describes models current to that time to be in the general form of: a. n. (. t. +. τ. ). =. l. n. [. v. n. −. 1. ( ...
"Amazon Might Rue Reaction to Blogging". Taipei Times. 2006-04-10. Retrieved 2008-09-29.. ...
Given the speed of this circuitry compared to the speed of human reaction times, Watson's reaction time was faster than the ... "The New York Times Magazine. Retrieved February 18, 2011.. *^ a b c d Jennings, Ken (February 16, 2011). "My Puny Human Brain" ... "The New York Times.. . *^ a b "NJ congressman tops 'Jeopardy' computer Watson". Associated Press. March 2, 2011. Archived from ... Watson has consistently better reaction time on the buzzer once it has generated a response, and is immune to human players' ...
Reaction". Los Angeles Times. Ross Levinsohn. Archived from the original on 2014-04-06. Retrieved 2017-12-17. Hochman, Steve ( ... Manson told the Los Angeles Times in 1998 that "I advocate the use of drugs, but have always looked down on the abuse of drugs ... Navarro was rumored to be struggling with drug addiction at the time; Manson refused to confirm whether this was true or not. ... Pareles, Jon (1998-11-26). "Rock Review; Not Easy to Keep Being Outrageous". The New York Times. A.G. Sulzberger. Archived from ...
Reaction". Los Angeles Times. Ross Levinsohn. Archived from the original on April 6, 2014. Retrieved December 17, 2017. Hochman ... Writing for the Phoenix New Times, Jim Louvau said that Manson "was on to something in 1998's Mechanical Animals when he wrote ... Louvau, Jim (May 30, 2013). "Marilyn Manson: "I Like To Smoke and Hang Out With The Gangsta Rappers"". Phoenix New Times. Voice ... Ali, Lorraine (September 13, 1998). "Marilyn Manson, Dressed to Kill". Los Angeles Times. Ross Levinsohn. Archived from the ...
Only time will tell how many other innovations will suffer under the Supreme Court's careless expansion of Section 101's patent ... The claim itself has two simple and conventional steps: first amplifying (by polymerase chain reaction, PCR) and then detecting ...
The bile acid pool size is between 4-6 g, which means that bile acids are recycled several times each day. About 95% of bile ... Phase III trials showed significant responses although many subjects had mild adverse reactions of bruising, swelling, pain, ...
Stanley suffered an injury that made him want to spend more time away from the city, and Benedict was not happy when the couple ... She describes in the book that individuals may deal with reactions to death, such as frustration and grief, differently. ... The summer after her first year teaching at the Orton School she returned home to the Shattucks' farm to spend some time in ... Margaret Mead and Ruth Benedict are considered to be the two most influential and famous anthropologists of their time.[ ...
Public reaction to the book was very strong. Many people were shocked at the extent of food contamination and drug side-effects ... Time bombs are ticking away in several dark corners. … It is 1933 all over again-multiplied by logarithms. The difference is ... The book was frequently criticized for being sensational propaganda, and many at the time questioned the credentials of the ... the health effects of which were not understood or known to consumers at the time.[3] The true label for a pineapple pie, they ...
Excluding full-time students working part-time, Swedish union density was 68% in 2019.[50] In all the Nordic countries with a ... This produced a reaction which led to all the colonies restricting Chinese and other Asian immigration. This was the foundation ... By this time, the existence and the demands of the trade unions were becoming accepted by liberal middle class opinion. In ... A union shop (US) or a "post-entry closed shop" (UK) employs non-union workers as well, but sets a time limit within which new ...
... the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.[24]: ... Pyramid structure can vary across ecosystems and across time. In some instances biomass pyramids can be inverted. This pattern ... These chemical reactions require energy, which mainly comes from the Sun and largely by photosynthesis, although a very small ... food webs over time). A food web diagram illustrating species composition shows how change in a single species can directly and ...
It is time to change this."[196] Conflicts of interest. Some commentators have said that special consideration must be given to ... Even low-risk medications such as antibiotics can have potential to cause life-threatening anaphylactic reactions in a very few ... "At the same time, people are gullible. It needs gullibility for the industry to succeed. It doesn't make me popular with the ... Parsippany, New Jersey: Time Home Entertainment. ISBN 9781933405926. .. *. Stevens, P., Jr. (November-December 2001). "Magical ...
Other important reactions include the formation of chlorite, glauconite, illite and iron oxide (if oxygenated pore water is ... In the field, it may at times be difficult to distinguish between a debris flow sedimentary breccia and a colluvial breccia, ... Chemically speaking, increases in temperature can also cause chemical reaction rates to increase. This increases the solubility ... Cementation can occur simultaneously with deposition or at another time. Furthermore, once a sediment is deposited, it becomes ...
Rejecting the common notions of his time that the use of breathing is to cool the heart, or assist the passage of the blood ... Antoine Lavoisier (1743-1794) and others later interpreted this gain in terms of a reaction with a gaseous material (oxygen) in ... The contents of this work, which was several times republished and translated into Dutch, German and French, show him to have ... especially in the summer time, in the city of Bath. In 1678, on the proposal of Robert Hooke, Mayow was appointed a fellow of ...
3 g of CaHMB taken three times a day (1 g each time) is the optimal posology, which allows for continual bioavailability of HMB ... or by inflammatory reactions in the body directed against muscle (the myopathies). Muscle atrophy can be opposed by the ... The protein balance at time of dormancy is also maintained by lower levels of protein breakdown during the winter time. At ... Also, time in a circa zero g environment without exercise will lead to atrophy. This is partially due to the smaller amount of ...
The spot may be aggravated by an allergic reaction to nickel plating on the chinrest clamp hardware, or by microbial pathogens ... a violinist can increase bow speed and still play softly at the same time. The two methods are not equivalent, because they ...
Some another time, I will deal with this question. It is enough saying today that the oldest statement about Galician extending ... In reaction to the relegation of the autochthonous language, a series of literary and historical works (always written in ... The Galician and Portuguese standards of the language diverged over time, following independent evolutionary paths. Portuguese ... two ideologically disparate rewritings of gender markers into Galician of The Curious Incident of the Dog in the Night-Time, by ...
At the same time, if group 3 is continued with lutetium and lawrencium, several trends are broken. For example, scandium and ... which prevents further reactions. Scandium(III) oxide, yttrium(III) oxide, lanthanum(III) oxide and lutetium(III) oxide are ... In 1787, Swedish part-time chemist Carl Axel Arrhenius found a heavy black rock near the Swedish village of Ytterby, Sweden ( ... Metallic scandium was produced for the first time in 1937 by electrolysis of a eutectic mixture, at 700-800 °C, of potassium, ...
Time-of-flight (TOF) PET: For modern systems with a higher time resolution (roughly 3 nanoseconds) a technique called "Time-of- ... no further reactions occur in FDG. Furthermore, most tissues (with the notable exception of liver and kidneys) cannot remove ... whose length is determined by the detector timing resolution. As the timing resolution improves, the signal-to-noise ratio (SNR ... If the resolving time of the detectors is less than 500 picoseconds rather than about 10 nanoseconds, it is possible to ...
Tests that are commonly used place potential allergens on the skin of the patient and looking for a reaction to look for an ... Antelman SM (1988). "Time-dependent sensitization as the cornerstone for a new approach to pharmacotherapy: drugs as foreign/ ... exposure to sufficiently high doses of a drug for long periods of time can transform someone who has relatively lower genetic ...
... such as a prolonged prothrombin time, partial thromboplastin time, and bleeding time.[96] Filovirions such as EBOV may be ... detecting the viral RNA by polymerase chain reaction (PCR)[6][23] and detecting proteins by enzyme-linked immunosorbent assay ( ... "The New York Times. Retrieved 5 August 2018.. *^ "DRC: Ebola Outbreak Worst in Country's History, Kills Almost 200". Democracy ... At that time, a 90-day period of heightened surveillance was announced by that agency. "This is the first time that all three ...
Measurements bound to a range and repeating (like degrees in a circle, clock time, etc.), graded membership categories, and ... Stevens's reaction was not to conduct experiments to test for the presence of additive structure in sensations, but instead to ... Cyclical ratio measurements include angles and times. Counts appear to be ratio measurements, but the scale is not arbitrary ... the operational theory of measurement was a reaction to the conclusions of a committee established in 1932 by the British ...
Over time, many parts of the chloroplast genome were transferred to the nuclear genome of the host,[4][7][26] a process called ... its genes encode eleven subunits of a protein complex which mediates redox reactions to recycle electrons,[24] which is similar ... Over time, base changes in the DNA sequence can arise from deamination mutations. When adenine is deaminated, it becomes ... Chloroplast polypeptide chains probably often travel through the two complexes at the same time, but the TIC complex can also ...
"Dermatology Times. Retrieved 7 June 2020.. *^ Garner SE, Eady A, Bennett C, Newton JN, Thomas K, Popescu CM (August 2012). " ... If the inflammatory reaction is severe, the follicle can break into the deeper layers of the dermis and subcutaneous tissue and ... Often, PIH can be prevented by avoiding any aggravation of the nodule and can fade with time. However, untreated PIH can last ... the time required to complete the procedure(s), and pain associated with some of the treatment modalities.[10] Typical side ...
Inflammatory reaction (e.g. acute respiratory tract infections, chronic sinusitis, rhinitis or environmental irritants) ... The local application of a vasoconstrictive agent has been shown to reduce the bleeding time in benign cases of epistaxis. The ... found it as effective as nasal cautery in the prevention of recurrent epistaxis in people without active bleeding at the time ...
Time of onset[edit]. Chemical causes: Right after delivery Neisseria gonorrhoeae: Delivery of the baby until 5 days post-birth ... it is possible for newborns to suffer from neonatal conjunctivitis due to reactions with chemicals in these common eye drops.[5 ... If the tear duct is not cleared by the time the newborn is one year old, surgery may be required.[2] ... Time trends in ophthalmia neonatorum and dacryocystitis of the newborn in England, 2000-2011: database study. Sex Transm Infect ...
In contrast, when the B cell lacked this asymmetric protein cluster, it was killed only 40% of the time.[36][37] ... Severe infusion reaction.. *Cardiac arrest. *Cytokine release syndrome. *Tumor lysis syndrome, causing acute renal failure ... "Time. Archived from the original on 20 October 2015. Retrieved 26 October 2015.. ...
Saltzman, I.J. & Garner, W.R. (1948). "Reaction time as a measure of span of attention". The Journal of Psychology. 25 (2): 227 ... A similar pattern of reaction times is found in young children, although with steeper slopes for both the subitizing range and ... While the increase in response time for each additional element within a display is 250-350 ms per item outside the subitizing ... which increases over time.[25] By the age of seven that ability increases to 4-7 objects. Some practitioners claim that with ...
"The New York Times. February 20, 2005. Archived from the original on January 15, 2013. Retrieved September 5, 2007.. ... Episode: "Physical Attraction... Chemical Reaction". 2009. Rescue Me. Psychic. Episode: "Jimmy". 2012. Made in Jersey. Natalie ...
a b Gorman, James, To Study Aggression, a Fight Club for Flies, The New York Times, February 4, 2014, page D5 of the New York ... Substance P is involved in the axon reflex-mediated vasodilatation to local heating and wheal and flare reaction. It has been ... The molecule, which is rapidly inactivated (or at times further activated by peptidases) is rapidly released - repetitively and ... Fight Club for Flies video, Science Take, New York Times, February 3, 2014 ...
"New York Times. Archived from the original on 4 November 2012.. *^ The Bone Marrow Foundation. "Cancer Research Pioneer Dies". ... Severe reactions[edit]. A study that surveyed 2408 donors found that serious adverse events (requiring prolonged ... "New York Times. Archived from the original on 21 October 2010.. *^ Thomas ED, Lochte HL, Lu WC, et al. (1957). "Intravenous ... "The New York Times. Archived from the original on 5 March 2014. Retrieved 15 May 2012.. ...
Duration- the amount of time from the start of a contraction to the end of the same contraction. Intensity- a measure of how ... However the safety of this technique has not been fully assessed; hearing impairment, stress reactions and other effects should ... Its presence is reassuring in predicting an absence of metabolic acidemia and hypoxic injury to the fetus at the time it is ... With an IUPC, this is determined by assessing actual pressures as graphed on the paper Interval- the amount of time between the ...
Can agree, borrow and misuse math all the time. --Izno (talk) 20:20, 13 September 2019 (UTC). Invariants and covariants[edit]. ... My knee-jerk reaction was, "This topic is basically (integers in) quadratic number fields, which are extremely important." But ... τ=2π does not at this point of time meet the criteria of notability as per Notability or Wikipedia:Notability (numbers). See ... I was going through and sourcing each 'application' one at a time, when I found a book that had all of them: https://books. ...
"International Business Times.. *^ "Tentacles of venom: new study reveals all octopuses are venomous". University of Melbourne. ... The physical principle behind this is that the force required to accelerate the water through the orifice produces a reaction ... In 2005, Adopus aculeatus and veined octopus (Amphioctopus marginatus) were found to walk on two arms, while at the same time ... Octopuses have only six arms, the other two are actually legs! Hindustan Times, 13 August 2008. ...
... of formal and ideological strategies which writers and artists develop textually in response or in reaction to their own time ... It was timed to coincide with the exhibition Say: "Parsley" by Performance Writing co-founder Caroline Bergvall and Ciaran ... time-based media, installation, electronic literature, bookworks, and performance art.[1] ...
The simulator calculates how temperature and pressure affect molecules as the reaction progresses. We use Newtons equations ... A computer simulator that can display a chemical reaction in 3D has been developed in Japan by a group led by NEC. ... Real-time reaction. 18 April 1998 A computer simulator that can display a chemical reaction in 3D has been. developed in Japan ... temperature and pressure affect molecules as the reaction progresses. "We use. Newtons equations to fix the motion of the ...
Reaction TimeStrength variables [1]Minimum RT and comparison of senses [2]Complexity conditions [3]Explanations of RT [4] ... Reaction Time Encyclopedia of Aging COPYRIGHT 2002 The Gale Group Inc.. REACTION TIME. In cognitive psychology, reaction time ( ... Pachella, R. The Use of Reaction Time Measures in Information Processing Research. In Human Information Processing. Edited ... Sternberg, S. Two Operations in Character Recognition: Some Evidence from Reaction Time Measurements. Perception & ...
Game action between the Tampa Bay Rays and the Baltimore Orioles .Orioles' relief pitcher Koji Uehara reacts to striking out Rays' Evan Longoria for the game ending out, which gave the 8-7 win to Baltimore.
Re: [HACKERS] Reducing pg_ctls reaction time Tom Lane Mon, 26 Jun 2017 12:16:20 -0700 ... Re: [HACKERS] Reducing pg_ctls reaction time Tom Lane. * *Re: [HACKERS] Reducing pg_ctls reaction time Jeff Janes ... Re: [HACKERS] Reducing pg_ctls reaction time Michael Paquier. * * ... HACKERS] Reducing pg_ctls reaction time Tom Lane. * * ... Re: [HACKERS] Reducing pg_ctls reaction ... Tom Lane. * *Re: [ ...
Analysis and opinion on the latest news trends written by Washington Times staffers including Cheryl K. Chumley, Ralph Hallow ... Donald Trump has a point: Time to investigate Team Obama. By Cheryl K. Chumley - The Washington Times ... All site contents © Copyright 2018 The Washington Times, LLC,3600 New York Avenue NE , Washington, DC 20002 ,202-636-3000. ... By Cheryl K. Chumley - The Washington Times A new study of 100,000-plus French adults has found that those who eat a lot of ...
New research demonstrates that musical training improves reaction time to auditory and tactile stimuli. The findings open the ... For the first time, this effect is demonstrated in their responses to auditory and tactile cues.. Musicians reaction times to ... Reaction times and the aging population. Although the study might provide bragging rights for musicians, there is a more ... Reaction times tend to slow during the process of aging. For certain individuals, this can be a significant problem. However, ...
The stipulated time for a PhD in JNU is 4+1 years. I am in my fourth year now. I am a recipient of the Jawaharlal Nehru ... JNU reaction This refers to Part 3 of the series ?Three Lives in Student Politics? (December 28), featuring me as a student ...
... nuclear reaction). Commentary and archival information about fusion (Nuclear Reaction) from The New York Times. ... nuclear reaction). Commentary and archival information about fusion (Nuclear Reaction) from The New York Times. ... A New York Times Column on Climate and Energy The Times launches a new column on global warming and energy. ... A New York Times Column on Climate and Energy The Times launches a new column on global warming and energy. ...
N Irelands reaction to Brit green paper is generally favorable; MP B Devlin terms paper irrelevant as it deals only with ... October 31, 1972, Page 7 The New York Times Archives BELFAST, Northern Ireland, Oct. 30-Reaction to the British Government ... A version of this archives appears in print on October 31, 1972, on Page 7 of the New York edition with the headline: Reactions ...
Who has the best reaction time? Do your reaction times improve with practice? Did your reaction times vary a lot or were they ... I tried it five times and my reaction time was under. 10 seconds every time. But how far above your hand should your friend ... Compare the marking on the ruler where your fingers caught it to the reaction time chart. Your reaction time is how long it ... WAS THE ONE FASTER REACTION TIME.. Julia, age 13 of Austin, TX wrote:. Boys have faster RT than girls your reaction time ...
... people working part-time and a third of all jobless Britons being out of work for a year or more. ... Reaction: Unemployment falls but part-time working reaches record high. Experts digest the latest unemployment figures, which ... even for those who have found full-time employment, earning power for new starters remains well below pre-recession heights. ... Lack of full-time work and poor pay take gloss off rosy job figures ...
More from The Times and The Sunday Times. *The Times e-paper ... The Times Editorial Complaints. * The Sunday Times Editorial ...
An MTA bus rear-ended a pickup truck Saturday in a chain-reaction crash involving two other vehicles in Panorama City, leaving ... Times Staff Writer An MTA bus rear-ended a pickup truck Saturday in a chain-reaction crash involving two other vehicles in ... Copyright © 2020, Los Angeles Times , Terms of Service , Privacy Policy , CA Notice of Collection , Do Not Sell My Personal ... Copyright © 2020, Los Angeles Times , Terms of Service , Privacy Policy , CA Notice of Collection , Do Not Sell My Personal ...
Thank you for your interest in spreading the word about Science.. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.. ...
The ferry disaster off South Koreas southwest coast dominated online discussion in the country Thursday morning, with some people circulating screenshots of text messages allegedly sent from passengers trapped on board.
But Albeck said that this time, feelings are more intense.. "I had made a sign. My first instinct was Im going to tape this ... We were young during Vietnam, and except for a few small skirmishes, this was the first time we had really seen war." ... Even in times of war, she found herself facing a common Yalie plight: being overextended. ... As emotional attachment to victory increases, reaction and activism may become stronger, he said. ...
More from The Times and The Sunday Times. *The Times e-paper ... The Times Editorial Complaints. * The Sunday Times Editorial ... Times Britain at War.. (By Our Petrograd Correspondent.). Under the Soviet or committee system Russia has suffered a ... Reaction after Revolution. Whoever dared to criticize was banned as a counter-revolutionary, a supporter of Tsarism, an apostle ...
I read this book in one sitting! It had me on the edge of my seat the entire time trying to figure out if Gage and Lilly were ... CHAIN REACTION REBECCA YORK. ISBN# 978-373-22946-8/0-373-22946-1. October 2006. Harlequin Enterprises Limited. 225 Duncan Mill ... He finds himself in a race against both time and the would-be assassin to convince his wife of his innocence, get her help, ... He feels he must be onsite most of the time to be sure everything runs smoothly. He does not like to delegate work. ...
Vaccine reaction time lag. [2004 pdf] Dr Viera Scheibner. Dynamics of critical days as part of the dynamics of non-specific ... A reaction can be gradual. Deterioration can be gradual. Neurological problems can develop over time. They do in various ... A vaccine reaction is defined so that all bad reactions are said to occur very soon after the shot is given. But that does not ... The time lag between MMR vaccination and meningitis ranged from 14 to 28 days in the 35 cases of meningitis.---Fujinaga T, et ...
European Union defense ministers have reaffirmed plans to have their 60,000-strong rapid-reaction force ready for deployment by ... That would be despite months of delay caused by a dispute over the force between Greece and Turkey, which has left time short. ... Turkey is demanding co-decision rights on any future operations of the rapid-reaction force in the Balkans, a region it ... In spite of the dispute, the rapid-reaction force has made certain advances. One concrete achievement is the creation of a ...
Toddlers reaction after clearly seeing parents for first time with glasses. Duration: 01:57 09/03/2019. ... Toddlers reaction after clearly seeing parents for first time with glasses. Rumble ... Milo the Chihuahuas priceless reaction after meeting baby sister. Rumble * Pelican patiently waits in line to be served at ... Milo the Chihuahuas priceless reaction after meeting baby sister. Rumble 1:24 ...
Researchers have found that middle-aged people who have slow reaction times have a higher risk of early death. ... Could reaction time tests be used to monitor health and survival? ... What can reaction times tell us about a persons future health? In a reaction time test, participants have to press a button as ... Hagger-Johnson thinks that reaction time could be used to monitor specific aspects of patients health: "Reaction time may ...
Effect of Reaction Rate and Calcination Time on Nanoparticles. C. M. Dudhe1 and S. B. Nagdeote2 ... C. M. Dudhe and S. B. Nagdeote, "Effect of Reaction Rate and Calcination Time on Nanoparticles," Journal of Nanoscience, vol. ...
... discusses new film based on her book and controversial Time magazine breastfeeding cover ... CBS News) A recent Time magazine cover featuring a woman breastfeeding her three-year-old son has become a lightning rod for ... "Of course, I was on the set a lot of the time, being borderline obnoxious." ...
THE FINANCIAL TIMES LTD 2018. FT and Financial Times are trademarks of The Financial Times Ltd.. The Financial Times and its ... Jan 28: Market reaction to Fed Despite not being able to lower interest rates any further, the Fed still can have a big impact ... Victor Mallet on the Chinese reaction to the latest round of US tariffs ...
My brothers reaction." Mr. Perez is the brother of the father of two of the victims, as well as the brother of the head of the ... All site contents © Copyright 2021 The Washington Times, LLC , 3600 New York Avenue NE , Washington, DC 20002 , 202-636-3000. ... Singer: Its time for a reset of the divisive U.S. flag ... Thats about the time police think the childrens throats were ... By - The Washington Times - Wednesday, July 20, 2005 BALTIMORE - A Mexican immigrant charged with killing three young children ...
Hindustan Times , By Sonakshi Babbar, Jaipur UPDATED ON JAN 21, 2011 05:58 PM IST ... something that happens and we cope with it and we develop various reactions. The novel is a catalogue of these reactions.. ... I see love as normal human reaction to some things, my Museum Of Innocence wasnt written to address the melodramatic aspects ... Love is a normal human reaction. Says the Nobel laureate Orhan Pamuk when asked about his girlfriend Booker Prize winner ...
For patients with PD, reaction times, but not movement times, displayed an inverse significant correlation with the scores of ... Increased reaction time predicts visual learning deficits in Parkinsons disease.. Marinelli L1, Perfetti B, Moisello C, Di ... Patients with PD showed higher reaction and movement times, while visual learning was reduced compared with controls. ... a motor task where subjects were required to move as soon as possible to randomly presented targets by minimizing reaction time ...
Gauge his reaction time in this science and math activity that requires only a yardstick and a friend. ... For instance: is your childs reaction time better when his eyes are open? Why or why not? You can also use graph paper and ... The Passing of Time This science fair project idea explores whether people have an innate feel for the passing of time from a ... Afterward, look at the results and discuss with your child why his reaction times might vary from trial to trial. ...
Using a priori knowledge about the structure of chemical reaction kinetics we develop global nonlinear models which use ... elementary reactions as a basis set, and discuss model construction using top-down and bottom-up approaches. ... We consider the problem of inferring kinetic mechanisms for biochemical reactions from time series data. ... Extracting biochemical reaction kinetics from time series data. EJ Crampin, PE McSharry, S Schnell ...
  • And finally, some reactions to FiveThirtyEight's foray into March Madness (if you are sick of college basketball, skip to the Reads section). (
  • Recently, simple and rapid assays for quantifying mRNA expression by real-time reverse transcription-polymerase chain reaction (RT-PCR) have been used for analysis of cytokine profiles in humans and other mammalian species. (
  • Methods used for detecting the amplified DNA products from the polymerase chain reaction as they accumulate instead of at the end of the reaction. (
  • In order to get into the 2019 Boston Marathon, which will run on April 15, marathon times had to be four minutes and 52 seconds faster than the qualifying standards. (
  • E. Affili and E. Valdinoci , Decay estimates for evolution equations with classical and fractional time-derivatives, J. Differential Equations , 266 (2019), 4027-4060. (
  • Essentially texting while driving doubles a driver's reaction time," says Christine Yager, who led the study, which appears on the institute's website . (
  • A new test is demonstrating how important wearing high-visibility clothing is when it comes to helping improve a driver's reaction time. (
  • However, darkness is another factor that can drastically reduce a driver's reaction time. (
  • Evolutionary, pattern forming partial differential equations (PDEs) are often derived as limiting descriptions of microscopic, kinetic theory-based models of molecular processes (e.g., reaction and diffusion). (
  • X. Bao and Z. C. Wang , Existence and stability of time periodic traveling waves for a periodic bistable Lotka-Volterra competition system, J. Differential Equations , 255 (2013), 2402-2435. (
  • T. Faria and S. Trofimchuk , Nonmonotone travelling waves in a single species reaction-diffusion equation with delay, J. Differential Equations , 228 (2006), 357-376. (
  • P. C. Fife and M. Tang , Comparison principles for reaction-diffusion systems: Irregular comparison functions and applications to questions of stability and speed of propagation of disturbances, J. Differential Equations , 40 (1981), 168-185. (
  • Reaction-diffusion equations modeling Predator-Prey interaction are of current interest. (
  • In this work, we have incorporated, throughout numerical comparison experiments, spectral methods, for the space discretization, in conjunction with second and fourth-order time integrating methods for approximating the solution of the reaction-diffusion differential equations. (
  • This paper is concerned with time-delayed reaction-diffusion equations. (
  • Asymptotic stability of non-monotone traveling waves for time-delayed nonlocal dispersion equations. (
  • Global asymptotic stability of pushed traveling fronts for monostable delayed reaction-diffusion equations. (
  • Stability of non-monotone non-critical traveling waves in discrete reaction-diffusion equations with time delay. (
  • Multidimensional stability of time-periodic planar traveling fronts in bistable reaction-diffusion equations. (
  • Time-delayed boundary feedback stabilization of the isothermal Euler equations with friction. (
  • Pushed traveling fronts in monostable equations with monotone delayed reaction. (
  • Exponential stability of traveling fronts in monostable reaction-advection-diffusion equations with non-local delay. (
  • Local stability of traveling-wave solutions of nonlinear reaction-diffusion equations. (
  • In this Aug. 9, 2018, file photo, a firefighter keeps watch as a wildfire burns in the Cleveland National Forest in Corona, Calif. Researchers have expanded a health-monitoring study of wildland firefighters after a previous study found season-long health declines and deteriorating reaction times. (
  • We consider the problem of inferring kinetic mechanisms for biochemical reactions from time series data. (
  • Crucially, the microscope can image individual ions in a solution and reveal biochemical reactions as they occur-without interfering in the process. (
  • Some metal ions can be harmful to cells, whereas others are necessary for biochemical reactions, such as those involved in metabolism. (
  • Such a method could one day allow researchers to watch biochemical reactions as they occur in cells. (
  • Using a priori knowledge about the structure of chemical reaction kinetics we develop global nonlinear models which use elementary reactions as a basis set, and discuss model construction using top-down and bottom-up approaches. (
  • For the numerical solution of nonlinear reaction diffusion problems (most of which are stiff 1 ), fully explicit temporal methods are avoided due to the sever restriction on the time step size imposed by the stiff diffusion term. (
  • Nonlinear stability of traveling wavefronts in an age-structured reaction-diffusion population model. (
  • Musicians' reaction times to sensory stimuli may be better than those of non-musicians. (
  • The latest study in this field asks whether musicality might improve reaction times - not just in relation to sight and sound, but also using tactile stimuli. (
  • For college-age individuals, reaction times to light stimuli have been published as 190 milliseconds, or 0.19 seconds, and to auditory stimuli as 160 milliseconds, or 0.16 seconds. (
  • Human reaction times vary according to the type of stimuli, the method of measurement and the particular study's results. (
  • A study published in 1899 by the Journal of the Anthropological Institute determined that humans have a faster reaction time to auditory stimuli as opposed to visual stimuli. (
  • Some sexual dimorphism may exist in reaction times, particularly to auditory stimuli, according to a study published in 2011 by PLOS ONE. (
  • Reflexes in response to stimuli are our quickest reactions. (
  • And Twitter was a hub of frenzied discussion each time the advert breaks made their unwelcome appearance. (
  • One Twitter user luckily turned down a mid-race bathroom break-and was able to slip under the time. (
  • Reactions to Quentin Tarantino 's " Once Upon a Time in Hollywood ," which premiered Tuesday evening in Cannes, have started flooding Twitter, and critics are excited, to say the least. (
  • Initial reactions from critics on Twitter are positive, and some compare it to "Pulp Fiction," one of Tarantino's early works that made him a household name. (
  • Mental chronometry is the use of response time in perceptual-motor tasks to infer the content, duration, and temporal sequencing of cognitive operations. (
  • Sign up for our Crime Time Newsletter and subscribe to our true crime podcast Martinis & Murder for all the best true crime content. (
  • The reasons for the link between slow reaction time and death are not yet known," lead researcher Dr. Gareth Hagger-Johnson told Medical News Today . (
  • One theory is that slow reaction time might reflect deterioration of other bodily systems, such as the brain and nervous system. (
  • If this is true," he added, "there might be some unknown 'common cause' of both slow reaction time and physical illness. (
  • I have slow reaction time in this test (250 on a good day) and I am slower than my friends in game as well. (
  • A study, recently published in the journal Brain and Cognition , finds that trained musicians have faster reaction times than their non-musical peers. (
  • We found significantly faster reaction times with musicians for auditory, tactile, and audio-tactile stimulations. (
  • Allergic reactions --- Do they change over time? (
  • Has anyone ever had an allergic reaction change your personality during the crisis like this? (
  • A test published in 1907 by the Archives of Psychology provided evidence that if a stimulus is stronger, the reaction time will be quicker. (
  • Including light stimulus, sound stimulus and compete against all the world in real-time. (
  • Reaction time is the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response. (
  • The time from the onset of a stimulus until a response is observed. (
  • To illustrate the abstract results, we investigate a time periodic Lotka-Volterra system with two species by presenting the existence and nonexistence of traveling wave solutions, which connect the trivial steady state to the unique positive periodic solution of the corresponding kinetic system. (
  • Crampin EJ, McSharry PE, Schnell S (2004) Extracting Biochemical Reaction Kinetics from Time Series Data. (
  • Based on these spectra, the system is then used to monitor the hydration of mesityl oxide to diacetone alcohol from which we extract reaction kinetics values. (
  • In this same test, researchers determined that in one out of 1,000 starts, a male and female sprinter could achieve a reaction time of 109 milliseconds and 121 milliseconds respectively. (
  • Give your friend (or friends) a chance to test their reaction times. (
  • In a reaction time test, participants have to press a button as soon as they see an image appear on a computer monitor. (
  • In the early 1990s, the participants underwent a reaction time test, and researchers followed them over the next 15 years to record which participants had died and which survived. (
  • Cross-referencing this data with results from the reaction time test, the researchers found that the participants who logged slower reaction times were 25% more likely to have died. (
  • In this activity, you will conduct a simple, measurable experiment (the ruler drop test) to study reaction time and determine how it can be improved with practice. (
  • Each test was performed five times, the slowest reaction time was thrown out and an average speed was determined. (
  • You can test your reaction time of many ways. (
  • Test your reaction time by catching a falling ruler or clicking a target. (
  • On top of that, some of the reaction time increase could also be explained through having taken the test before. (
  • If forced to repeat the experiment one of the changes made would be more test subjects, more tests, and more time in between tests. (
  • First, they would each take a test measuring their reactions times. (
  • A Leasing Options spokesperson said: "Reaction times are vital when driving, as it can be the difference between a scary 'near-miss' and a terrible accident. (
  • For the first time, this effect is demonstrated in their responses to auditory and tactile cues. (
  • As a result, reaction time (RTs) to these cues becomes increasingly fast as subjects learn and utilize these transition probabilities. (
  • At 35 and 70 mph, the reaction times of the drivers while texting were far worse than those, sans devices, after a few rounds of cocktails. (
  • That's used to predict alertness and reaction times, which get worse as fatigue levels rise. (
  • The Bay Area native is a graduate of UC Berkeley and started at the Los Angeles Times in 2004. (
  • Credit: Mark Boster / Los Angeles Times. (
  • News about Fusion (Nuclear Reaction), including commentary and archival articles published in The New York Times. (
  • Last year, Medical News Today reported on a study that found reaction time could be improved by drinking water . (
  • CBS News) A recent Time magazine cover featuring a woman breastfeeding her three-year-old son has become a lightning rod for controversy. (
  • News Flash: Get news alerts from the Times-Tribune on your mobile phone or in your email. (
  • reaction -in-sub-second- time -microsecs-300761666 .html . (
  • Catch all the Business News , Breaking News Events and Latest News Updates on The Economic Times . (
  • Download The Economic Times News App to get Daily Market Updates & Live Business News. (
  • After the news broke, many runners shared their feelings about this year's steep cutoff time and the new qualifying standards for 2020 over social media. (
  • Crime Time is your destination for true crime stories from around the world, breaking crime news, and information about Oxygen's original true crime shows and documentaries. (
  • Here is a sampling of other opinions, gathered by Times correspondents and news agencies, from world leaders, citizens of Brazil, India, Egypt, Norway and elsewhere, as well as comments from our own readers. (
  • Free unlimited access to Credit Union Times' trusted and independent team of experts for extensive industry news, conference coverage, people features, statistical analysis, and regulation and technology updates. (
  • These results suggest for the first time that long-term musical training reduces simple non-musical auditory, tactile, and multisensory reaction times. (
  • A computer simulator that can display a chemical reaction in 3D has been developed in Japan by a group led by NEC. (
  • Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction. (
  • Moreover, the growth in food, chemical, and pharmaceutical sectors of countries in Asia Pacific is also creating the huge demand for real-time PCR systems. (
  • The idea behind a quantum MRI-which images at the quantum level using electron spins-is to do the same for chemical reactions including those involving metal ions. (
  • We combine high-resolution mid-infrared dual-comb spectroscopy with attenuated total reflectance measurements to provide in-situ monitoring of a chemical reaction. (
  • A vaccine reaction is defined so that all bad reactions are said to occur very soon after the shot is given. (
  • Because the vaccine obviously acts in the body for a long period of time after it is given. (
  • Note: Not all vaccine reactions photos are available for each day listed below. (
  • Vaccine "take" on day 6 after vaccination in a first-time vaccinee. (
  • Source: Vaccination reactions in vaccinia-naïve and previously vaccinated volunteers in a clinical study of diluted Dryvax smallpox vaccine enrolled at the NIAID-supported Vaccine Treatment and Evaluation Units at Saint Louis University in 2002. (
  • The expert committee unanimously concluded that these reactions were not vaccine-related. (
  • Some of the known vaccine-related reactions following the measles-rubella shot include rash and itching. (
  • Such reaction can occur with any vaccine . (
  • The magazine rented out an airport taxiway and then measured the reaction times of two drivers, the magazine's 22-year-old intern, with his iPhone, and its 37-year-old editor in chief, Eddie Alterman, a man with a Samsung Alias - and professional driving experience. (
  • The rising number of infectious diseases caused due to the food contamination is creating the huge demand for real-time PCR systems. (
  • The widespread of spoilage is caused due to the contamination and the intake of such foods results in foodborne illness and therefore, the adoption of real-time PCR systems is increasing rapidly. (
  • Moreover, increasing number of people facing foodborne illness is creating the demand for real-time PCR systems in order to determine the presence of human pathogens and microorganisms. (
  • Furthermore, the growing demand for packaged foods is also one of the major factors which drives the growth of real-time PCR systems market. (
  • In addition, increasing food safety standards and rising focus on food security is compelling food & beverages manufactures towards the adoption of real-time PCR systems. (
  • Real-time PCR systems are the laboratory equipments which are used to amplify the copies of specific DNA segment. (
  • The rising prevalence of chronic and infectious diseases is propelling the growth of real-time PCR systems market. (
  • Furthermore, the advancements in various sectors such as forensics, diagnostics, and proteomics research is creating the potential growth opportunities for real-time PCR Systems market. (
  • The rapid growth in the analytical instruments market is the primary factor driving the growth of the real-time PCR systems market. (
  • Also, the increasing adulteration of food products and growing need for accurate diagnosis are creating potential growth opportunities for real-time PCR systems market. (
  • Furthermore, the research & development spending of government coupled with the increasing number of food safety & diagnostics standards is also fuelling the growth of real-time PCR systems market. (
  • Apart from this, the surge in demand for real-time PCR systems for sample preparations and for accurate data analysis and interpretation at the time of high sample volumes and shorter timelines is also driving the growth of real-time PCR systems. (
  • In addition, the continuous demand for advanced real-time PCR systems for various research areas such as pathogen detection, genetic diseases, oncology, and pharmacogenomics is also propelling the growth of real-time PCR systems market. (
  • The high cost of real-time PCR systems is the primary factor which hampers the growth of real-time PCR systems market. (
  • Moreover, the reluctance of small and medium size organizations towards the adoption of real-time PCR systems due to limited budget is the major challenge for the growth of real-time PCR systems market. (
  • On the basis of geography, North America is expected to capture the large market share in terms of revenue in the real-time PCR systems market, due to the growing adoption of advanced real-time PCR systems for food safety and analysis and presence of various key real-time PCR systems manufacturer in the region. (
  • Europe and Asia Pacific are also anticipated to capture substantial market shares in the global real-time PCR systems market, owing to the presence of various testing laboratories, pharmaceutical, and research facilities in various countries of these regions. (
  • Furthermore, the real-time PCR systems markets in MEA and Latin America are expected witness moderate growth owing to the growing investments in the research and development sector of various countries in these regionS. (
  • There's one more: an interactive social plug-in on CNN's Facebook page prompting viewers to give real-time reaction to the debate. (
  • This report describes the development and application of real time RT-PCR to measure the expression of several important elk ( Cervus elaphus ) cytokine mRNAs, including interleukin (IL)-2, IL-4, IL-10, IL-12p40, interferon-gamma, tumor necrosis factor (TNF)- α, and the enzyme-inducible nitric oxide synthase, all of which are involved in immune responses and regulation. (
  • This article reports the results from experiments conducted to survey the utility of dielectric spectroscopy (DES) as a real-time, in-situ technique to monitor the extent of reaction during synthesis of three low molecular weight resins that are representative of components used in coatings formulations. (
  • In all three cases, very good to excellent correlations were found between continuous real-time DES output and the values of characteristic QC parameters (viscosity, acid number, epoxy equivalent weight, % NCO, ATR-FTIR peak heights for reactants and products, and GPC data) determined by off-line analysis of samples taken periodically during the reactions. (
  • Using this Gizmo, students can collect, graph and analyze REAL TIME DATA, and have fun doing it! (
  • Great for teaching students how to collect, graph and analyze REAL-TIME data! (
  • An MTA bus rear-ended a pickup truck Saturday in a chain-reaction crash involving two other vehicles in Panorama City, leaving seven bus passengers with minor injuries, officials said. (
  • Buy Time Components from Chain Reaction Cycles, the World's Largest Online Bike Store. (
  • The time lag between MMR vaccination and meningitis ranged from 14 to 28 days in the 35 cases of meningitis. (
  • Vaccination site 3 days after vaccination in first-time vaccinee. (
  • Vaccination site 18 days after vaccination in first-time vaccinee. (
  • Source: Vaccination reactions in vaccinia-naïve and previously vaccinated volunteers at CDC, 2009. (
  • The results also showed that a short single exposure to blue light for half an hour is sufficient to produce measurable changes in reaction times and more efficient responses (answered more items correctly per second) during conditions of greater cognitive load after the light exposure had ended. (
  • Reactions flooded my inbox before Obama was even done speaking. (
  • Lech Walesa, the 1983 peace prize winner and Poland's president from 1990 to 1995, seemed to sum up the basic thrust of many commenters, both here on the Times Web site and elsewhere , saying to reporters in Warsaw: "Who, Obama? (
  • You still have http and database connections, that might take sometimes longer, some times are quicker. (
  • A class of these models is reaction diffusion (RD) problems that, for instant, reproduce some of the complex pattern observed on the skin of certain animals. (
  • Reaction diffusion models have been studied extensively since the RD theory first proposed by Turing [2] to describe the range of spatial patterns observed in the developing embryo. (
  • The work presented in this article is motivated by the theoretical and computational study by Gavie [5] for the dynamical properties of the 2-component reaction-diffusion system modeling predator-prey interactions with the Holling type II functional response. (
  • Existence of traveling wavefronts of delayed reaction diffusion systems without monotonicity. (
  • Novel stability results for traveling wavefronts in an age-structured reaction-diffusion equation. (
  • Spatiotemporal attractors generated by the Turing-Hopf bifurcation in a time-delayed reaction-diffusion system. (
  • Traveling waves and their stability in a coupled reaction diffusion system. (
  • Traveling waves to a reaction-diffusion equation. (
  • For all traveling wavefronts, they are proved to be stable time-asymptotically by the technical weighted energy method with the comparison principle together, which extends the wave stability results obtained in [7,8]. (
  • She reported on the Supreme Court for The New York Times from 1978 to 2008. (
  • Former senator, presidential nominee, and secretary of state John Kerry visited The Late Show With Stephen Colbert on Wednesday and shared his thoughts on the New York Times op-ed piece by an anonymous senior official who claims to be part of a White House "resistance. (
  • Kyle Buchanan of the New York Times said, "There will be many, many hot takes on the new Tarantino, but I don't mind letting mine cool off on the counter a little longer. (
  • An article in The New York Times on Wednesday about the uncertainty of paying for the construction of a $3.9 billion replacement of the Tappan Zee Bridge - making higher tolls seem inevitable - elicited a striking number of comments from readers, more than 100 in less than 24 hours. (
  • You can find the latest New York Today at or in the morning, on The New York Times homepage or its New York section . (
  • A study published by the Journal of Athletic Training in 2010 found that NCAA athletes had a 0.203-second reaction time on average. (
  • However, we should be cautious about blowing the dust off celebratory bunting just yet because, even for those who have found full-time employment, earning power for new starters remains well below pre-recession heights. (
  • The researchers also found that a texting driver was 11 times more likely to miss the flashing light. (
  • In 2006, a study by Monash University's Accident Research Centre found young drivers spent 400 per cent more time not watching the road while using their phones to send and retrieve text messages than those who didn't. (
  • A new study, published in the journal PLOS ONE , has found that adults who have slow reaction times have a higher risk of an early death. (
  • Although the study found a link between reaction time and when the participants died, the study was not able to determine what causes of death slow reaction was linked to. (
  • That led to an ongoing health-monitoring study involving wrist-worn motion monitors and body composition measurements that last year found health declines and deteriorating reaction times among firefighters as the season progressed. (
  • The devices found that not only did reaction times falter as firefighters remained longer on a fire before getting a mandatory break, Brooks said, but firefighters also tended to take longer to recover as the season progressed. (
  • Research by the car leasing firm found if someone is wearing high visibility clothing, reaction times are reduced by 2.1 seconds. (
  • Do your reaction times improve with practice? (
  • There is not really a solid way to improve reaction times other than lots and lots of practice to improve your specific in game reaction time like you've probably already have. (
  • Sometimes, fatigue levels reached a level that suggested reaction times slowed down so much it took firefighters twice as long to react. (
  • President Donald Trump sent out a tweet of praise for former Massachusetts governor and failed presidential hopeful Mitt Romney, endorsing his one-time White House rival for the Senate in Utah. (
  • Geneva: A spokeswoman for the World Health Organisation said the UN health agency doesn't have an immediate reaction to a letter from US President Donald Trump that listed his complaints against it, including that it had shown "an alarming lack of independence" from China in its response to the coronavirus outbreak. (
  • Many athletes spend hours practicing to improve their reaction time. (
  • My reaction time is 320ms thats like 100ms slower then average (20yo btw) Also i do a lot of aim botz and my record is 100kills for 80 seconds what is pretty bad as well Is there any way to improve this? (
  • Reaction time is a hard one to improve. (
  • Our hypothesis was that if subjects were fed peppermint candies then their reaction time would improve. (
  • Planning and control of time to improve efficiency and effectiveness. (
  • When the results were measured with a computer, they were noticeably slower, with an average reaction time of 0.268 of a second, according to a literature review done by Clemson University researchers. (
  • Beijing Olympic runners were measured for their reaction times, and the results concluded that male runners had an average reaction time of 166 milliseconds, or 0.166 of a second, while female runners had an average of 189 milliseconds, or 0.189 of a second. (
  • Try catching the ruler twice more, marking the results on your graph each time. (
  • Afterward, look at the results and discuss with your child why his reaction times might vary from trial to trial. (
  • To obtain standardized quantitative results, external controls consisting of a DNA template for each target gene were used to generate linear standard curves over a 6 to 8 log range with detection of as few as 10 copies of amplicon per reaction. (
  • While this tool can definitely be useful, fans are finding it tough to look their screen time in the face , and it's yielding some hilarious results. (
  • The results have revealed that these methods have advantages over the conventional methods , some of which to mention are: the ease of implementation, accuracy and CPU time. (
  • Compare the marking on the ruler where your fingers caught it to the reaction time chart. (
  • Your reaction time is how long it took for your eyes to tell your brain that the ruler was falling and then for your brain to tell your fingers to catch it. (
  • Conduct several trials with the same volunteer, dropping the ruler from 2cm above her fingers each time. (
  • However, no matter how good your muscle memory for this task becomes, it will always take some time for the falling ruler to travel as a message from your eyes to your brain and from your brain to your fingers! (
  • Mental chronometry is studied using the measurements of reaction time (RT). (
  • Reaction in the Middle East to President Obama's speech on U.S. policy toward the region ran the gamut from surprise to support to disappointment . (
  • For the time being Obama's just making proposals. (
  • As emotional attachment to victory increases, reaction and activism may become stronger, he said. (
  • I know that when reaction rate increases then reaction time decreases, but I am not sure how I should be expressing that. (
  • If speed increases by a factor of 2, what happens to time? (
  • Exposure to Blue Wavelength Light is Associated with Increased Dorsolateral Prefrontal Cortex Responses, and Increases in Response times During a Working Memory Task. (
  • Two days after the Big Three's recognition of his Government, General Charles de Gaulle called correspondents to the War Ministry, gave them his reaction: 'Everybody is glad that the French Government is now called by its right name. (
  • The proposal to allow only the top 20 percentile students from each education board to qualify for admission to the Indian Institutes of Technology (IITs), has drawn mixed reactions. (
  • By subtracting the RT to a simpler situation from that to a more complex situation, he hoped to find the time required for the additional mental act. (
  • When he comes to in a mental hospital, he is kept drugged the entire time and knows something is seriously wrong. (
  • What Is the Average Human Reaction Time? (
  • My time average time was the same as my mom's! (
  • I had the opposite happen to me, improved my focus and started playing more, allowed me to go from 200 - 220 ms reaction time to around 180 - 190 ms on average. (
  • this is my reaction time on average. (
  • Information on the total observation, recognition, decision and reaction distances required for various sized motorcars and speeds on a flat section of road are given in the graph below. (
  • Here's a quick and simple experiment that gauges your child's reaction time. (
  • This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other! (
  • For this experiment the experimenters wanted to know if reaction time could be affected by peppermint. (
  • When a human subject follows instructions to make a specific response as soon as he can after the presentation of a specific signal, the latency of the response is called reaction time ( RT ). (
  • The more complex the response individuals have to perform, the slower their reaction time will be, suggesting that a more complex answer requires more cognitive activity and, therefore, an inherently longer reaction time. (
  • 60hz vs 144hz monitor is 10-15ms difference depending on the response time but your mouse should only add 1ms if you have 1000hz polling rate and PC shouldnt add more than a couple of ms if everything is working correctly. (
  • In these models, the most important element is the " functional response", the function that describes the number of prey consumed by predator per unit time. (
  • However, in my experience, everything that has to do with web technology is generally always quite 'unstable' when it comes to response time. (
  • You will record each other's reaction times on this graph to compare them when you finish testing. (
  • You can also use graph paper and markers to record the reaction times of other family members and friends. (
  • Is there a way to prevent this, i.e. to suppress this variation of reaction time measurement? (
  • Your child should react by closing his fingers on the yardstick at the same time to catch it. (
  • The critics had a mixed reaction to the finale of David Tennant and Olivia Colman's detective drama, but what did the Twittersphere make of it? (