Voluntary or involuntary motion of head that may be relative to or independent of body; includes animals and humans.
The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.
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.
Voluntary or reflex-controlled movements of the eye.
A reflex wherein impulses are conveyed from the cupulas of the SEMICIRCULAR CANALS and from the OTOLITHIC MEMBRANE of the SACCULE AND UTRICLE via the VESTIBULAR NUCLEI of the BRAIN STEM and the median longitudinal fasciculus to the OCULOMOTOR NERVE nuclei. It functions to maintain a stable retinal image during head rotation by generating appropriate compensatory EYE MOVEMENTS.
An oval, bony chamber of the inner ear, part of the bony labyrinth. It is continuous with bony COCHLEA anteriorly, and SEMICIRCULAR CANALS posteriorly. The vestibule contains two communicating sacs (utricle and saccule) of the balancing apparatus. The oval window on its lateral wall is occupied by the base of the STAPES of the MIDDLE EAR.
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)
The positioning and accommodation of eyes that allows the image to be brought into place on the FOVEA CENTRALIS of each eye.
Three long canals (anterior, posterior, and lateral) of the bony labyrinth. They are set at right angles to each other and are situated posterosuperior to the vestibule of the bony labyrinth (VESTIBULAR LABYRINTH). The semicircular canals have five openings into the vestibule with one shared by the anterior and the posterior canals. Within the canals are the SEMICIRCULAR DUCTS.
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).
An abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading.
The four cellular masses in the floor of the fourth ventricle giving rise to a widely dispersed special sensory system. Included is the superior, medial, inferior, and LATERAL VESTIBULAR NUCLEUS. (From Dorland, 27th ed)
Soft tissue tumors or cancer arising from the mucosal surfaces of the LIP; oral cavity; PHARYNX; LARYNX; and cervical esophagus. Other sites included are the NOSE and PARANASAL SINUSES; SALIVARY GLANDS; THYROID GLAND and PARATHYROID GLANDS; and MELANOMA and non-melanoma skin cancers of the head and neck. (from Holland et al., Cancer Medicine, 4th ed, p1651)
The vestibular part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The vestibular nerve fibers arise from neurons of Scarpa's ganglion and project peripherally to vestibular hair cells and centrally to the VESTIBULAR NUCLEI of the BRAIN STEM. These fibers mediate the sense of balance and head position.
The coordination of a sensory or ideational (cognitive) process and a motor activity.
Common name for many members of the FALCONIFORMES order, family Accipitridae, generally smaller than EAGLES, and containing short, rounded wings and a long tail.
A genus of the family CEBIDAE consisting of four species: S. boliviensis, S. orstedii (red-backed squirrel monkey), S. sciureus (common squirrel monkey), and S. ustus. They inhabit tropical rain forests in Central and South America. S. sciureus is used extensively in research studies.
A gelatinous membrane overlying the acoustic maculae of SACCULE AND UTRICLE. It contains minute crystalline particles (otoliths) of CALCIUM CARBONATE and protein on its outer surface. In response to head movement, the otoliths shift causing distortion of the vestibular hair cells which transduce nerve signals to the BRAIN for interpretation of equilibrium.
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.
Eye movements that are slow, continuous, and conjugate and occur when a fixed object is moved slowly.
The storing or preserving of video signals for television to be played back later via a transmitter or receiver. Recordings may be made on magnetic tape or discs (VIDEODISC RECORDING).
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.
The measurement of various aspects of MAGNETIC FIELDS.
Use of a device for the purpose of controlling movement of all or part of the body. Splinting and casting are FRACTURE FIXATION.
Sense of movement of a part of the body, such as movement of fingers, elbows, knees, limbs, or weights.
An increase in the rate of speed.
The position or attitude of the body.
The anterior pair of the quadrigeminal bodies which coordinate the general behavioral orienting responses to visual stimuli, such as whole-body turning, and reaching.
Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (NYSTAGMUS, OPTOKINETIC), caloric test, or a rotating chair.
Disorder caused by motion, as sea sickness, train sickness, car sickness, air sickness, or SPACE MOTION SICKNESS. It may include nausea, vomiting and dizziness.
The real or apparent movement of objects through the visual field.
Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.
Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272)
A number of tests used to determine if the brain or balance portion of the inner ear are causing dizziness.
Sensory functions that transduce stimuli received by proprioceptive receptors in joints, tendons, muscles, and the INNER EAR into neural impulses to be transmitted to the CENTRAL NERVOUS SYSTEM. Proprioception provides sense of stationary positions and movements of one's body parts, and is important in maintaining KINESTHESIA and POSTURAL BALANCE.
A game whose object is to sink a ball into each of 9 or 18 successive holes on a golf course using as few strokes as possible.
Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.
Awareness of oneself in relation to time, place and person.
Pathological processes of the inner ear (LABYRINTH) which contains the essential apparatus of hearing (COCHLEA) and balance (SEMICIRCULAR CANALS).
Methods and procedures for recording EYE MOVEMENTS.
Voluntary activity without external compulsion.
The time from the onset of a stimulus until a response is observed.
The three membranous semicircular ducts within the bony semicircular canals. They open into the UTRICLE through five openings. Each duct has at one end a sensory area called the ampullary crest. AMPULLARY HAIR CELLS of the crests sense the movement of ENDOLYMPH resulting from rotation of the head.
The properties, processes, and behavior of biological systems under the action of mechanical forces.
Sensory cells in the acoustic maculae with their apical STEREOCILIA embedded in a gelatinous OTOLITHIC MEMBRANE. These hair cells are stimulated by the movement of otolithic membrane, and impulses are transmitted via the VESTIBULAR NERVE to the BRAIN STEM. Hair cells in the saccule and those in the utricle sense linear acceleration in vertical and horizontal directions, respectively.
The hemispheric articular surface at the upper extremity of the thigh bone. (Stedman, 26th ed)
Recording of the changes in electric potential of muscle by means of surface or needle electrodes.
An ergot derivative that acts as an agonist at dopamine D2 receptors (DOPAMINE AGONISTS). It may also act as an antagonist at dopamine D1 receptors, and as an agonist at some serotonin receptors (SEROTONIN RECEPTOR AGONISTS).
A neurotoxic isoxazole isolated from species of AMANITA. It is obtained by decarboxylation of IBOTENIC ACID. Muscimol is a potent agonist of GABA-A RECEPTORS and is used mainly as an experimental tool in animal and tissue studies.
Physical motion, i.e., a change in position of a body or subject as a result of an external force. It is distinguished from MOVEMENT, a process resulting from biological activity.
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 pair of ophthalmic lenses in a frame or mounting which is supported by the nose and ears. The purpose is to aid or improve vision. It does not include goggles or nonprescription sun glasses for which EYE PROTECTIVE DEVICES is available.
The sole family in the order Sphenisciformes, comprised of 17 species of penguins in six genera. They are flightless seabirds of the Southern Hemisphere, highly adapted for marine life.
A dyskinesia characterized by an inability to maintain the fingers, toes, tongue, or other body parts in a stable position, resulting in continuous slow, sinusoidal, and flowing involuntary movements. This condition is frequently accompanied by CHOREA, where it is referred to as choreoathetosis. Athetosis may occur as a manifestation of BASAL GANGLIA DISEASES or DRUG TOXICITY. (From Adams et al., Principles of Neurology, 6th ed, p76)
The observable response an animal makes to any situation.
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.
An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.
The muscles that move the eye. Included in this group are the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, superior oblique, musculus orbitalis, and levator palpebrae superioris.
Four clusters of neurons located deep within the WHITE MATTER of the CEREBELLUM, which are the nucleus dentatus, nucleus emboliformis, nucleus globosus, and nucleus fastigii.
The blending of separate images seen by each eye into one composite image.
Viral proteins that facilitate the movement of viruses between plant cells by means of PLASMODESMATA, channels that traverse the plant cell walls.
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 in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
A suspension of metallic gold particles.
Elements of limited time intervals, contributing to particular results or situations.
A symptom, not a disease, of a twisted neck. In most instances, the head is tipped toward one side and the chin rotated toward the other. The involuntary muscle contractions in the neck region of patients with torticollis can be due to congenital defects, trauma, inflammation, tumors, and neurological or other factors.
The anterior portion of the spermatozoon (SPERMATOZOA) that contains mainly the nucleus with highly compact CHROMATIN material.
Use of electric potential or currents to elicit biological responses.
Normal nystagmus produced by looking at objects moving across the field of vision.
A species of the genus MACACA which typically lives near the coast in tidal creeks and mangrove swamps primarily on the islands of the Malay peninsula.
The part of a human or animal body connecting the HEAD to the rest of the body.
Acceleration produced by the mutual attraction of two masses, and of magnitude inversely proportional to the square of the distance between the two centers of mass. It is also the force imparted by the earth, moon, or a planet to an object near its surface. (From NASA Thesaurus, 1988)
The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (COCHLEA; VESTIBULAR LABYRINTH; and SEMICIRCULAR CANALS) in the TEMPORAL BONE. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (COCHLEAR DUCT; SACCULE AND UTRICLE; and SEMICIRCULAR DUCTS) forming a continuous space enclosed by EPITHELIUM and connective tissue. These spaces are filled with LABYRINTHINE FLUIDS of various compositions.
An illusion of movement, either of the external world revolving around the individual or of the individual revolving in space. Vertigo may be associated with disorders of the inner ear (EAR, INNER); VESTIBULAR NERVE; BRAINSTEM; or CEREBRAL CORTEX. Lesions in the TEMPORAL LOBE and PARIETAL LOBE may be associated with FOCAL SEIZURES that may feature vertigo as an ictal manifestation. (From Adams et al., Principles of Neurology, 6th ed, pp300-1)
The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)
Physical activity of the FETUS in utero. Gross or fine fetal body movement can be monitored by the mother, PALPATION, or ULTRASONOGRAPHY.
Perception of three-dimensionality.
The 3d cranial nerve. The oculomotor nerve sends motor fibers to the levator muscles of the eyelid and to the superior rectus, inferior rectus, and inferior oblique muscles of the eye. It also sends parasympathetic efferents (via the ciliary ganglion) to the muscles controlling pupillary constriction and accommodation. The motor fibers originate in the oculomotor nuclei of the midbrain.
An order of wholly aquatic MAMMALS occurring in all the OCEANS and adjoining seas of the world, as well as in certain river systems. They feed generally on FISHES, cephalopods, and crustaceans. Most are gregarious and most have a relatively long period of parental care and maturation. Included are DOLPHINS; PORPOISES; and WHALES. (From Walker's Mammals of the World, 5th ed, pp969-70)
The movement of cells from one location to another. Distinguish from CYTOKINESIS which is the process of dividing the CYTOPLASM of a cell.
Two membranous sacs within the vestibular labyrinth of the INNER EAR. The saccule communicates with COCHLEAR DUCT through the ductus reuniens, and communicates with utricle through the utriculosaccular duct from which the ENDOLYMPHATIC DUCT arises. The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the VESTIBULAR NERVE.
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
Nerve structures through which impulses are conducted from a peripheral part toward a nerve center.
Neural tracts connecting one part of the nervous system with another.
The total area or space visible in a person's peripheral vision with the eye looking straightforward.
The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.
Application of statistical procedures to analyze specific observed or assumed facts from a particular study.
The absence of light.
Instinctual behavior pattern in which food is obtained by killing and consuming other species.
Endogenous compounds and drugs that bind to and activate GAMMA-AMINOBUTYRIC ACID receptors (RECEPTORS, GABA).
The selecting and organizing of visual stimuli based on the individual's past experience.
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
A mechanism of communication within a system in that the input signal generates an output response which returns to influence the continued activity or productivity of that system.
Aseptic or avascular necrosis of the femoral head. The major types are idiopathic (primary), as a complication of fractures or dislocations, and LEGG-CALVE-PERTHES DISEASE.
Traumatic injuries to the cranium where the integrity of the skull is not compromised and no bone fragments or other objects penetrate the skull and dura mater. This frequently results in mechanical injury being transmitted to intracranial structures which may produce traumatic brain injuries, hemorrhage, or cranial nerve injury. (From Rowland, Merritt's Textbook of Neurology, 9th ed, p417)
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.
The superior part of the upper extremity between the SHOULDER and the ELBOW.
The physical activity of a human or an animal as a behavioral phenomenon.
Traumatic injuries involving the cranium and intracranial structures (i.e., BRAIN; CRANIAL NERVES; MENINGES; and other structures). Injuries may be classified by whether or not the skull is penetrated (i.e., penetrating vs. nonpenetrating) or whether there is an associated hemorrhage.
Act of eliciting a response from a person or organism through physical contact.
Signals for an action; that specific portion of a perceptual field or pattern of stimuli to which a subject has learned to respond.
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.
Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
The distal part of the arm beyond the wrist in humans and primates, that includes the palm, fingers, and thumb.
Use of sound to elicit a response in the nervous system.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
AUTOMOBILES, trucks, buses, or similar engine-driven conveyances. (From Random House Unabridged Dictionary, 2d ed)
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Surgically placed electric conductors through which ELECTRIC STIMULATION is delivered to or electrical activity is recorded from a specific point inside the body.
Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.
Dyssomnias associated with disruption of the normal 24 hour sleep wake cycle secondary to travel (e.g., JET LAG SYNDROME), shift work, or other causes.
Neurons which activate MUSCLE CELLS.
The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturbing stimuli. Nonlinear systems may exhibit "chaos" which is classically characterized as sensitive dependence on initial conditions. Chaotic systems, while distinguished from more ordered periodic systems, are not random. When their behavior over time is appropriately displayed (in "phase space"), constraints are evident which are described by "strange attractors". Phase space representations of chaotic systems, or strange attractors, usually reveal fractal (FRACTALS) self-similarity across time scales. Natural, including biological, systems often display nonlinear dynamics and chaos.
Neurons which conduct NERVE IMPULSES to the CENTRAL NERVOUS SYSTEM.
Electrodes with an extremely small tip, used in a voltage clamp or other apparatus to stimulate or record bioelectric potentials of single cells intracellularly or extracellularly. (Dorland, 28th ed)
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.
The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.

Recovery of the vestibulocolic reflex after aminoglycoside ototoxicity in domestic chickens. (1/868)

Avian auditory and vestibular hair cells regenerate after damage by ototoxic drugs, but until recently there was little evidence that regenerated vestibular hair cells function normally. In an earlier study we showed that the vestibuloocular reflex (VOR) is eliminated with aminoglycoside antibiotic treatment and recovers as hair cells regenerate. The VOR, which stabilizes the eye in the head, is an open-loop system that is thought to depend largely on regularly firing afferents. Recovery of the VOR is highly correlated with the regeneration of type I hair cells. In contrast, the vestibulocolic reflex (VCR), which stabilizes the head in space, is a closed-loop, negative-feedback system that seems to depend more on irregularly firing afferent input and is thought to be subserved by different circuitry than the VOR. We examined whether this different reflex also of vestibular origin would show similar recovery after hair cell regeneration. Lesions of the vestibular hair cells of 10-day-old chicks were created by a 5-day course of streptomycin sulfate. One day after completion of streptomycin treatment there was no measurable VCR gain, and total hair cell density was approximately 35% of that in untreated, age-matched controls. At 2 wk postlesion there was significant recovery of the VCR; at this time two subjects showed VCR gains within the range of control chicks. At 3 wk postlesion all subjects showed VCR gains and phase shifts within the normal range. These data show that the VCR recovers before the VOR. Unlike VOR gain, recovering VCR gain correlates equally well with the density of regenerating type I and type II vestibular hair cells, except at high frequencies. Several factors other than hair cell regeneration, such as length of stereocilia, reafferentation of hair cells, and compensation involving central neural pathways, may be involved in behavioral recovery. Our data suggest that one or more of these factors differentially affect the recovery of these two vestibular reflexes.  (+info)

Projections and firing properties of down eye-movement neurons in the interstitial nucleus of Cajal in the cat. (2/868)

To clarify the role of the interstitial nucleus of Cajal (INC) in the control of vertical eye movements, projections of burst-tonic and tonic neurons in and around the INC were studied. This paper describes neurons with downward ON directions. We examined, by antidromic activation, whether these down INC (d-INC) neurons contribute to two pathways: a commissural pathway to the contralateral (c-) INC and a descending pathway to the ipsilateral vestibular nucleus (i-VN). Stimulation of the two pathways showed that as many as 74% of neurons were activated antidromically from one of the pathways. Of 113 d-INC neurons tested, 44 were activated from the commissural pathway and 40 from the descending pathway. No neurons were activated from both pathways. We concluded that commissural and descending pathways from the INC originate from two separate groups of neurons. Tracking of antidromic microstimulation in the two nuclei revealed multiple low-threshold sites and varied latencies; this was interpreted as a sign of existence of axonal arborization. Neurons with commissural projections tended to be located more dorsally than those with descending projections. Neurons with descending projections had significantly greater eye-position sensitivity and smaller saccadic sensitivity than neurons with commissural projections. The two groups of INC neurons increased their firing rate in nose-up head rotations and responded best to the rotation in the plane of contralateral posterior/ipsilateral anterior canal pair. Neurons with commissural projections showed a larger phase lag of response to sinusoidal rotation (54.6 +/- 7.6 degrees ) than neurons with descending projections (45.0 +/- 5.5 degrees ). Most neurons with descending projections received disynaptic excitation from the contralateral vestibular nerve. Neurons with commissural projections rarely received such disynaptic input. We suggest that downward-position-vestibular (DPV) neurons in the VN and VN-projecting d-INC neurons form a loop, together with possible commissural loops linking the bilateral VNs and the bilateral INCs. By comparing the quantitative measures of d-INC neurons with those of DPV neurons, we further suggest that integration of head velocity signals proceeds from DPV neurons to d-INC neurons with descending projections and then to d-INC neurons with commissural projections, whereas saccadic velocity signals are processed in the reverse order.  (+info)

Action of the brain stem saccade generator during horizontal gaze shifts. I. Discharge patterns of omnidirectional pause neurons. (3/868)

Omnidirectional pause neurons (OPNs) pause for the duration of a saccade in all directions because they are part of the neural mechanism that controls saccade duration. In the natural situation, however, large saccades are accompanied by head movements to produce rapid gaze shifts. To determine whether OPNs are part of the mechanism that controls the whole gaze shift rather than the eye saccade alone, we monitored the activity of 44 OPNs that paused for rightward and leftward gaze shifts but otherwise discharged at relatively constant average rates. Pause duration was well correlated with the duration of either eye or gaze movement but poorly correlated with the duration of head movement. The time of pause onset was aligned tightly with the onset of either eye or gaze movement but only loosely aligned with the onset of head movement. These data suggest that the OPN pause does not encode the duration of head movement. Further, the end of the OPN pause was often better aligned with the end of the eye movement than with the end of the gaze movement for individual gaze shifts. For most gaze shifts, the eye component ended with an immediate counterrotation owing to the vestibuloocular reflex (VOR), and gaze ended at variable times thereafter. In those gaze shifts where eye counterrotation was delayed, the end of the pause also was delayed. Taken together, these data suggest that the end of the pause influences the onset of eye counterrotation, not the end of the gaze shift. We suggest that OPN neurons act to control only that portion of the gaze movement that is commanded by the eye burst generator. This command is expressed by driving the saccadic eye movement directly and also by suppressing VOR eye counterrotation. Because gaze end is less well correlated with pause end and often occurs well after counterrotation onset, we conclude that elements of the burst generator typically are not active till gaze end, and that gaze end is determined by another mechanism independent of the OPNs.  (+info)

Three-dimensional eye-head coordination during gaze saccades in the primate. (4/868)

The purpose of this investigation was to describe the neural constraints on three-dimensional (3-D) orientations of the eye in space (Es), head in space (Hs), and eye in head (Eh) during visual fixations in the monkey and the control strategies used to implement these constraints during head-free gaze saccades. Dual scleral search coil signals were used to compute 3-D orientation quaternions, two-dimensional (2-D) direction vectors, and 3-D angular velocity vectors for both the eye and head in three monkeys during the following visual tasks: radial to/from center, repetitive horizontal, nonrepetitive oblique, random (wide 2-D range), and random with pin-hole goggles. Although 2-D gaze direction (of Es) was controlled more tightly than the contributing 2-D Hs and Eh components, the torsional standard deviation of Es was greater (mean 3.55 degrees ) than Hs (3.10 degrees ), which in turn was greater than Eh (1.87 degrees ) during random fixations. Thus the 3-D Es range appeared to be the byproduct of Hs and Eh constraints, resulting in a pseudoplanar Es range that was twisted (in orthogonal coordinates) like the zero torsion range of Fick coordinates. The Hs fixation range was similarly Fick-like, whereas the Eh fixation range was quasiplanar. The latter Eh range was maintained through exquisite saccade/slow phase coordination, i.e., during each head movement, multiple anticipatory saccades drove the eye torsionally out of the planar range such that subsequent slow phases drove the eye back toward the fixation range. The Fick-like Hs constraint was maintained by the following strategies: first, during purely vertical/horizontal movements, the head rotated about constantly oriented axes that closely resembled physical Fick gimbals, i.e., about head-fixed horizontal axes and space-fixed vertical axes, respectively (although in 1 animal, the latter constraint was relaxed during repetitive horizontal movements, allowing for trajectory optimization). However, during large oblique movements, head orientation made transient but dramatic departures from the zero-torsion Fick surface, taking the shortest path between two torsionally eccentric fixation points on the surface. Moreover, in the pin-hole goggle task, the head-orientation range flattened significantly, suggesting a task-dependent default strategy similar to Listing's law. These and previous observations suggest two quasi-independent brain stem circuits: an oculomotor 2-D to 3-D transformation that coordinates anticipatory saccades with slow phases to uphold Listing's law, and a flexible "Fick operator" that selects head motor error; both nested within a dynamic gaze feedback loop.  (+info)

Multichannel fenestrations of the petrous segment of the internal carotid artery. (5/868)

Multichannel fenestration of the internal carotid artery (ICA) is a rare, previously unreported developmental anomaly with unknown clinical significance. Although previously thought to have distinct embryologic origins, the presence of multiple channels in a short-segment fenestration favors a common developmental pathway for the origin of duplications and fenestrations: the persistence of a plexiform vascular network from the 4-mm to 5-mm embryologic stage of development.  (+info)

Spatial view cells in the primate hippocampus: allocentric view not head direction or eye position or place. (6/868)

Hippocampal function was analysed by making recordings from hippocampal neurons in monkeys actively walking in the laboratory. 'Spatial view' cells, which respond when the monkey looks at a part of the environment, were analysed. It is shown that these cells code for the allocentric position in space being viewed and not for eye position, head direction or the place where the monkey is located. This representation of space 'out there' would be an appropriate part of a primate memory system involved in memories of where in an environment an object was seen, and more generally in the memory of particular events or episodes, for which a spatial component normally provides part of the context.  (+info)

Influence of head position on the spatial representation of acoustic targets. (7/868)

Sound localization in humans relies on binaural differences (azimuth cues) and monaural spectral shape information (elevation cues) and is therefore the result of a neural computational process. Despite the fact that these acoustic cues are referenced with respect to the head, accurate eye movements can be generated to sounds in complete darkness. This ability necessitates the use of eye position information. So far, however, sound localization has been investigated mainly with a fixed head position, usually straight ahead. Yet the auditory system may rely on head motor information to maintain a stable and spatially accurate representation of acoustic targets in the presence of head movements. We therefore studied the influence of changes in eye-head position on auditory-guided orienting behavior of human subjects. In the first experiment, we used a visual-auditory double-step paradigm. Subjects made saccadic gaze shifts in total darkness toward brief broadband sounds presented before an intervening eye-head movement that was evoked by an earlier visual target. The data show that the preceding displacements of both eye and head are fully accounted for, resulting in spatially accurate responses. This suggests that auditory target information may be transformed into a spatial (or body-centered) frame of reference. To further investigate this possibility, we exploited the unique property of the auditory system that sound elevation is extracted independently from pinna-related spectral cues. In the absence of such cues, accurate elevation detection is not possible, even when head movements are made. This is shown in a second experiment where pure tones were localized at a fixed elevation that depended on the tone frequency rather than on the actual target elevation, both under head-fixed and -free conditions. To test, in a third experiment, whether the perceived elevation of tones relies on a head- or space-fixed target representation, eye movements were elicited toward pure tones while subjects kept their head in different vertical positions. It appeared that each tone was localized at a fixed, frequency-dependent elevation in space that shifted to a limited extent with changes in head elevation. Hence information about head position is used under static conditions too. Interestingly, the influence of head position also depended on the tone frequency. Thus tone-evoked ocular saccades typically showed a partial compensation for changes in static head position, whereas noise-evoked eye-head saccades fully compensated for intervening changes in eye-head position. We propose that the auditory localization system combines the acoustic input with head-position information to encode targets in a spatial (or body-centered) frame of reference. In this way, accurate orienting responses may be programmed despite intervening eye-head movements. A conceptual model, based on the tonotopic organization of the auditory system, is presented that may account for our findings.  (+info)

Enhancement of the vestibulo-ocular reflex by prior eye movements. (8/868)

We investigated the effect of visually mediated eye movements made before velocity-step horizontal head rotations in eleven normal human subjects. When subjects viewed a stationary target before and during head rotation, gaze velocity was initially perturbed by approximately 20% of head velocity; gaze velocity subsequently declined to zero within approximately 300 ms of the stimulus onset. We used a curve-fitting procedure to estimate the dynamic course of the gain throughout the compensatory response to head rotation. This analysis indicated that the median initial gain of compensatory eye movements (mainly because of the vestibulo-ocular reflex, VOR) was 0. 8 and subsequently increased to 1.0 after a median interval of 320 ms. When subjects attempted to fixate the remembered location of the target in darkness, the initial perturbation of gaze was similar to during fixation of a visible target (median initial VOR gain 0.8); however, the period during which the gain increased toward 1.0 was >10 times longer than that during visual fixation. When subjects performed horizontal smooth-pursuit eye movements that ended (i.e., 0 gaze velocity) just before the head rotation, the gaze velocity perturbation at the onset of head rotation was absent or small. The initial gain of the VOR had been significantly increased by the prior pursuit movements for all subjects (P < 0.05; mean increase of 11%). In four subjects, we determined that horizontal saccades and smooth tracking of a head-fixed target (VOR cancellation with eye stationary in the orbit) also increased the initial VOR gain (by a mean of 13%) during subsequent head rotations. However, after vertical saccades or smooth pursuit, the initial gaze perturbation caused by a horizontal head rotation was similar to that which occurred after fixation of a stationary target. We conclude that the initial gain of the VOR during a sudden horizontal head rotation is increased by prior horizontal, but not vertical, visually mediated gaze shifts. We postulate that this "priming" effect of a prior gaze shift on the gain of the VOR occurs at the level of the velocity inputs to the neural integrator subserving horizontal eye movements, where gaze-shifting commands and vestibular signals converge.  (+info)

Author(s): Fox, Jessica L; Frye, Mark A | Abstract: Visual identification of small moving targets is a challenge for all moving animals. Their own motion generates displacement of the visual surroundings, inducing wide-field optic flow across the retina. Wide-field optic flow is used to sense perturbations in the flight course. Both ego-motion and corrective optomotor responses confound any attempt to track a salient target moving independently of the visual surroundings. What are the strategies that flying animals use to discriminate small-field figure motion from superimposed wide-field background motion? We examined how fruit flies adjust their gaze in response to a compound visual stimulus comprising a small moving figure against an independently moving wide-field ground, which they do by re-orienting their head or their flight trajectory. We found that fixing the head in place impairs object fixation in the presence of ground motion, and that head movements are necessary for stabilizing wing
Visual identification of small moving targets is a challenge for all moving animals. Their own motion generates displacement of the visual surroundings, inducing wide-field optic flow across the retina. Wide-field optic flow is used to sense perturbations in flight course. Both ego-motion and corrective optomotor responses confound any attempt to track a salient target moving independently from the visual surroundings. What are the strategies that flying animals use to discriminate small-field figure motion from superimposed wide-field background motion? We examined how fruit flies adjust their gaze in response to a compound visual stimulus comprising a small moving figure against an independently moving wide-field ground, which they do either by re-orienting their head or by re-orienting their flight trajectory. We found that fixing the head in place impairs object fixation in the presence of ground motion, and that head movements are necessary for stabilizing wing steering responses to ...
TY - JOUR. T1 - Shared Genetic Factors Influence Head Motion During MRI and Body Mass Index. AU - Hodgson, Karen. AU - Poldrack, Russell A.. AU - Curran, Joanne E.. AU - Knowles, Emma E.. AU - Mathias, Samuel. AU - Göring, Harald H.H.. AU - Yao, Nailin. AU - Olvera, Rene L.. AU - Fox, Peter T.. AU - Almasy, Laura. AU - Duggirala, Ravi. AU - Barch, Deanna M.. AU - Blangero, John. AU - Glahn, David C.. PY - 2017/12/1. Y1 - 2017/12/1. N2 - Head movements are typically viewed as a nuisance to functional magnetic resonance imaging (fMRI) analysis, and are particularly problematic for resting state fMRI. However, there is growing evidence that head motion is a behavioral trait with neural and genetic underpinnings. Using data from a large randomly ascertained extended pedigree sample of Mexican Americans (n = 689), we modeled the genetic structure of head motion during resting state fMRI and its relation to 48 other demographic and behavioral phenotypes. A replication analysis was performed using ...
Registration of ego-motion is important to accurately navigate through space. Movements of the head and eye relative to space are registered through the vestibular system and optical flow, respectively. Here, we address three questions concerning the visual registration of self-rotation. 1. Eye-in-head movements provide a link between the motion signals received by sensors in the moving eye and sensors in the moving head. How are these signals combined into an ego-rotation percept? We combined optic flow of simulated forward and rotational motion of the eye with different levels of eye-in-head rotation for a stationary head. We dissociated simulated gaze rotation and head rotation by different levels of eye-in-head pursuit.We found that perceived rotation matches simulated head- not gaze-rotation. This rejects a model for perceived self-rotation that relies on the rotation of the gaze line. Rather, eye-in-head signals serve to transform the optic flows rotation information, that specifies rotation of
This post is my most popular post and I decided to update it from the original post from 2013- Updated 2/2/2016. Please let me know if you have any questions! This post is a follow up to my milestone post regarding development of head control. So here are my tips and tricks on…
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Human short-radius centrifugation (SRC) is being investigated as a volume-efficient means of delivering intermittent doses of artificial gravity to counter the deleterious effects of long exposures to weightlessness. Rotation rates on short radius centrifuges are high to provide the needed g-loading, and therefore entail a variety of unusual vestibular stimuli when certain head movements are made. Since these movements can elicit inappropriate nystagmus, illusions of tumbling, and motion sickness, efforts have been made to adapt people to the stimuli. So far these efforts have been successful in showing that people will adapt to at least one plane of head motion, the yaw (transverse) plane, during supine head-on-axis rotation. However, astronauts must be adapted to all planes of head motion if they are to function normally on the centrifuge. If adaptation to yaw head turns transferred to some extent to pitch (sagittal) plane turns, or any other plane of motion, it would greatly simplify and ...
The Frontal Eye Fields (FEF) participate in both working memory and sensorimotor transformations for saccades, but their role in integrating these functions through time remains unclear. Here, we tracked FEF spatial codes through time using a novel analytic method applied to the classic memory-delay saccade task. Three-dimensional recordings of head-unrestrained gaze shifts were made in two monkeys trained to make gaze shifts toward briefly flashed targets after a variable delay (450-1500 ms). A preliminary analysis of visual and motor response fields in 74 FEF neurons eliminated most potential models for spatial coding at the neuron population level, as in our previous study (Sajad et al., 2015). We then focused on the spatiotemporal transition from an eye-centered target code (T; preferred in the visual response) to an eye-centered intended gaze position code (G; preferred in the movement response) during the memory delay interval. We treated neural population codes as a continuous ...
Looking for head motion? Find out information about head motion. The vibrator on a reciprocating table concentrator which imparts motion to the deck Explanation of head motion
Using control systems modeling techniques, the following hypothesis has been developed into a gaze system model (Freedman, 2001). Hypothesis: a vectorial signal of desired gaze displacement is derived from the location of the active population in the deeper layers of the superior colliculus. This signal is subsequently decomposed into eye and head desired displacement signals which are used as input to separate controllers. A dynamic signal of horizontal head velocity inhibits the gain of the exponential function describing the horizontal eye burst generator. Learn more about Modeling the Gaze Control System ...
The vestibular system is a sensory system that has evolved over millions of years to detect acceleration of the head, both rotational and translational, in three dimensions. One of its most important functions is to stabilize gaze during unexpected head movement; however, it is also important in the control of posture and autonomic reflexes. Theta rhythm is a 3-12 Hz oscillating EEG signal that is intimately linked to self-motion and is also known to be important in learning and memory. Many studies over the last two decades have shown that selective activation of the vestibular system, either using natural rotational or translational stimulation, or electrical stimulation of the peripheral vestibular system, can induce and modulate theta activity ...
Young children and infants cant tell parents about vision problems and, in most cases, when a child has an eye problem from birth, he may not know his...
前方滑走ガイドの変化が下顎運動ならびに頭部の運動に及ぼす影響 [in Japanese] Influences of Changes in the Anterior Guide Angle on Mandibular and Head Movements [in Japanese] ...
This fascinating study offers insights into how to provide trunk support to improve head control in children with cerebral palsy.
Hi Zeman97,. Thanks for trying out the demo, and for the kind words. The feedback is much appreciated. In response to your questions/points. 1. Unfortunately, horizontal head motion is fraught with its own issues; primarily if you read horizontal motion as forward vector motion - youll be moved around inadvertantly when youre just looking around (with the movement active). Its what I started with, but moved away on, because it just didnt feel good.. There are a lot of options that can be tweaked to adjust the movement more to your liking... if its the case that you dont move your head much, and thus keep falling below the activation threshold, in the version Im working on right now (nearly done; just a bunch of UI work to update) Ive removed the activation threshold... it just comes at the cost of rejecting some inadvertant head motion when turning your head - but its fairly minimal, and I think ultimately improves the outcome.. I think the other thing I can do to improve the walking ...
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Because Microsofts Kinect for Windows is now able to detect and capture head rotation, you can activate the feature to receive head-rotation data from the sensor to transfer to iClone through the Mocap Device Plug-in.. Please note that if you activate this feature, you will need to trade it off for around 10% ~ 20% of the capture frame rate.. ...
Last Updated // February 2, 2015}. December 3, 2013: Khloë is born at 7:22 pm, delivered by midwife and obstetrician. She is two weeks early, weighs 7 lb 4 oz, and is 19 inches long. Khloë is perfectly healthy!. January 3, 2014: Khloë turns 1 month old!. January 16, 2014: Check-up with family doctor. February 3, 2014: Khloë turns 2 months old!. February 4, 2014: Check-up with family doctor. Dr K is concerned that Khloë is floppy but suggests we give her more time to develop. She receives her two-month vaccinations and weighs 11 lb 13 oz.. March 3, 2014: Khloë turns 3 months old!. March 12, 2014: Check-up with family doctor. Khloë shows improvement in head control, which satisfies Dr K, but she is still floppy. Hydrocortisone cream is prescribed for eczema. Khloë weighs 13 lb 12 oz and is 24.5 inches long. March 30, 2014: Khloë is sick with her first cold.. April 2, 2014: Khloë has a chest x-ray which shows her cold has progressed to bronchiolitis. She is given an oral steroid to ...
Specialized mechanoreceptors, known as hair cells, detect and encode angular and linear components of head movements as well as the orientation of the head with respect to gravity
When do we get to start solids? We have some guidelines to follow to figure out when is best. She would like the babies to all be between 13-14 lbs so we have a few more weeks to go before that happens. They also should be drinking at least 32 oz of BM which is happening but not consistently. They eat between 28-34 oz depending on whether the are going through a growth spurt. Another thing is that they should be able to support their heads w/o assistance. Now, that isnt sitting w/o assistance b/c they havent gotten there yet BUT it is necessary for them to be able to control their head movements. So, we have 2 of the 3 pretty much under out belts. Dr. Nguyen said in another 4 wks they should be ready to start rice cereal. Personally, if they are still good w/ drinking BM, then I am not going to do rice cereal until they are 6 mths old. Much easier that way! Besides, feeding 3 babies w/ a spoon...HA! That is going to get messy quickly! Im diggin the bottles right now, hardly any mess ...
BPG- These are non magnifying reading glasses that allow you to read or watch tv while lying down in complete comfort flat (supine) on your back in bed. These glasses with the help of multiple prisms bend your view 90 degrees to eliminate the need to crane your neck they are made for lying flat or with a slight pillow. They eliminate the need for head movement while lying down ideal vision .... Get Price ...
Over the last several years, head-mounted devices (HMDs) for virtual and augmented reality have been coming to consumer markets in different sizes and
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In a bid to detect amblyobia faster in children, 16-year-old Vrishab Krishna and his 18-year-old brother, Biswesh Krishna from Bengaluru, have come out with an app called Kanna.
TY - JOUR. T1 - Coordination of eye and head movements during smooth pursuit in patients with vestibular failure. AU - Waterston, J A. AU - Barnes, G R. AU - Grealy, M A. AU - Luxon, L M. PY - 1992/12. Y1 - 1992/12. N2 - During pursuit of smoothly moving targets with combined eye and head movements in normal subjects, accurate gaze control depends on successful interaction of the vestibular and head movement signals with the ocular pursuit mechanisms. To investigate compensation for loss of the vestibulo-ocular reflex during head-free pursuit in labyrinthine-deficient patients, pursuit performance was assessed and compared under head-fixed and head-free conditions in five patients with isolated bilateral loss of vestibular function. Target motion consisted of predictable and unpredictable pseudo-random waveforms containing the sum of three or four sinusoids. Comparison of slow-phase gaze velocity gains under head-free and head-fixed conditions revealed no significant differences during pursuit ...
Some neurons encode information about the orientation or position of an animal, and can maintain their response properties in the absence of visual input. Examples include head direction cells in rats and primates, place cells in rats and spatial view cells in primates. Continuous attractor neural networks model these continuous physical spaces by using recurrent collateral connections between the neurons which reflect the distance between the neurons in the state space (e.g. head direction space) of the animal. These networks maintain a localized packet of neuronal activity representing the current state of the animal. We show how the synaptic connections in a one-dimensional continuous attractor network (of for example head direction cells) could be self-organized by associative learning. We also show how the activity packet could be moved from one location to another by idiothetic (self-motion) inputs, for example vestibular or proprioceptive, and how the synaptic connections could self-organize to
Embodiments distinguish among user interface elements based on head orientation. Coordinates representing a set of at least three reference points in an image of a subject gazing on the user interface elements are received by a computing device. The set includes a first reference point and a second reference point located on opposite sides of a third reference point. A first distance between the first reference point and the third reference point is determined. A second distance between the second reference point and the third reference point is determined. The computing device compares the first distance to the second distance to calculate a head orientation value. The computing device selects at least one of the user interface elements based on the head orientation value. In some embodiments, the head orientation value enables the user to navigate a user interface menu or control a character in a game.
The system provides improved procedures to estimate head motion between two images of a face. Locations of a number of distinct facial features are identified in two images. The identified locations can correspond to the eye comers, mouth corners and nose tip. The locations are converted into as a set of physical face parameters based on the symmetry of the identified distinct facial features. The set of physical parameters reduces the number of unknowns as compared to the number of equations used to determine the unknowns. An initial head motion estimate is determined by: (a) estimating each of the set of physical parameters, (b) estimating a first head pose transform corresponding to the first image, and (c) estimating a second head pose transform corresponding to the second image. The head motion estimate can be incorporated into a feature matching algorithm to refine the head motion estimation and the physical facial parameters. In one implementation, an inequality constraint is placed on a
0015] As will be described below, according to an embodiment, a magnetic disk device includes a head, a coil motor, a drive circuit, a voltage detector, a head position calculation unit, a velocity calculation unit, a counter electromotive voltage calculation unit, a coil resistance estimation unit, and a control unit. The head performs read and write of information over an information storage medium having servo information. The coil motor moves the head. The drive circuit drives the coil motor. The voltage detector detects an inter-terminal voltage of a coil included in the coil motor. The head position calculation unit calculates a position of the head for each sampling cycle on the basis of the servo information. The velocity calculation unit calculates a velocity of the head at the position for each sampling cycle. The counter electromotive voltage calculation unit calculates a counter electromotive voltage of the coil for each sampling cycle. The coil resistance estimation unit ...
As a prominent illusion, the motion aftereffect (MAE) has traditionally been considered a visual phenomenon. Recent neuroimaging work has revealed increased activities in MT+ and decreased activities in vestibular regions during the MAE, supporting the notion of visual-vestibular interaction on the MAE. Since the head had to remain stationary in fMRI experiments, vestibular self-motion signals were absent in those studies. Accordingly, more direct evidence is still lacking in terms of whether and how vestibular signals modulate the MAE. By developing a virtual reality approach, the present study for the first time demonstrates that horizontal head rotation affects the perceived velocity of the MAE. We found that the MAE was predominantly perceived as moving faster when its direction was opposite to the direction of head rotation than when its direction was the same as head rotation. The magnitude of this effect was positively correlated with the velocity of head rotation. Similar result patterns ...
A page image and fault tolerance control apparatus for print heads which may be implemented as a single digital head control ASIC. The head control ASIC provides the following major functions: 1) Reads the data for the print head from a page or band memory; 2) Provides image data to the print head at the correct timing; 3) Records which blocks of nozzles contain faulty nozzles or drive circuits; 4) Provides the correct data for the main or redundant nozzles depending on the fault status; 5) Determines the number of actuators that are on in any phase so that the power supply can be compensated; 6) Generates timing signals for power supply time dependence; 7) Provides fault status information to the print head; 8) Generates the clock for the print head; and 9) Generates the enable signals for the print head.
Individual differences in brain metrics, especially connectivity measured with functional MRI, can correlate with differences in motion during data collection. The assumption has been that motion causes artifactual differences in brain connectivity that must and can be corrected. Here we propose that differences in brain connectivity can also represent a neurobiological trait that predisposes to differences in motion. We support this possibility with an analysis of intra- versus intersubject differences in connectivity comparing high- to low-motion subgroups. Intersubject analysis identified a correlate of head motion consisting of reduced distant functional connectivity primarily in the default network in individuals with high head motion. Similar connectivity differences were not found in analysis of intrasubject data. Instead, this correlate of head motion was a stable property in individuals across time. These findings suggest that motion-associated differences in brain connectivity cannot ...
Visual processing of large-field scenes is performed in an interplay of gaze shifts (gaze = eye-in-head + head-in-space) and memorization of local visual stimuli in a visual short-term memory (VSTM). VSTM is considered a subdivision within the visual part of the working memory (Baddeley, 1978, 1992, 2003) and characterized by a limited storage capacity (Phillips, 1974). The upper limit of this storage capacity was identified as three to four objects, independently of the number of feature dimensions (e.g., color, shape, or orientation) probed for each object (e.g., Irwin & Andrews, 1996; Luck & Vogel, 1997; Vogel, Woodman, & Luck, 2001). In addition, the total information capacity of VSTM is also limited (Alvarez & Cavanagh, 2004; Xu, 2002). Alvarez and Cavanagh (2004) suggested that there is an upper limit on storage that is set in terms of the total amount of information and that there is a functional dependence between the complexity of the objects and the total number of objects that can be ...
Rats use rhythmic movements of their vibrissae (whiskers) to tactually explore their environment. This whisking behavior has generally been reported to be strictly synchronous and symmetric about the snout, and it is thought to be controlled by a brainstem central pattern generator. Because the vibrissae can move independently of the head, however, maintaining a stable perception of the world would seem to require that rats adjust the bilateral symmetry of whisker movements in response to head movements. The present study used high-speed videography to reveal dramatic bilateral asymmetries and asynchronies in free-air whisking during head rotations. Kinematic analysis suggested that these asymmetric movements did not serve to maintain any fixed temporal relationship between right and left arrays, but rather to redirect the whiskers to a different region of space. More specifically, spatial asymmetry was found to be strongly correlated with rotational head velocity, ensuring a look-ahead ...
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The head carries most of the sensory systems that enable us to function effectively in our three-dimensional habitat. Without adequate head movement control, efficient spatial orientation and motor responses to visual and auditory stimuli could not be carried out. This is the most comprehensive and up-to-date account of the control of vertebrate head movements and its biomechanical and neural basis.
A couple of days ago, one of my pullets started shaking her head, kind of like a horse whinnying, if that makes sense. It happens every couple of...
An innovative semi-automatic image annotation system is enriched with the feedbacks of users eyes. This system implicitly exploits the competence of human
Coordinating the movements of different body parts is a challenging process for the central nervous system because of several problems. Four of these main difficulties are: first, moving one part can
The vestibulo-ocular reflex is obtained by having the patient visually fixate on an object straight ahead, then rapidly turning the patients head form side to side and up and down. The eyes should stay fixed on the object and turn in the opposite direction of the head movement. The first principle of neurologic diagnosis is regional or anatomical localization. In order to become skillful the student must understand how structure relates to function of the nervous system. The neurologic examinat ...
The vestibulo-ocular reflex is obtained by having the patient visually fixate on an object straight ahead, then rapidly turning the patients head form side to side and up and down. The eyes should stay fixed on the object and turn in the opposite direction of the head movement. The first principle of neurologic diagnosis is regional or anatomical localization. In order to become skillful the student must understand how structure relates to function of the nervous system. The neurologic examinat ...
My 2nd Alternate Model of LEGO 31031.The Owl has 360 degree head rotation you can tilt it backwards. Fully posable wings with spreadable feathers, moving tail and legs. Bird with moving legs and tail. Snake with moving body sections. [email protected]
Moses is the third child for the mother whose daughters each weighed nine pounds.. This little guy is about double what we expect a normal baby to be, said Jill White, nursing director of the birthing center at Hutchinson Regional Medical Center.. When you think of babies who would normally reach that 14 pound mark, theyre also starting to have a lot more neurological development, so that head control and body movement. Hes a newborn. He doesnt have all that yet, so it does take a lot more to hold on to. ...
Weve been trying tummy time in small increments for a few weeks now. Its going well - Everett can lift his head up very high quite a few times before he settles into a mid level lift. This weekend, we introduced the Bumbo seat. Its a little early as he still lacks complete head control - but he just beams with pride in his big boy seat so he gets just a few minutes in it every so often with much Mommy support ...
Today Noah is a very happy 2.5 year old. He attends therapy at Neuroworx twice a week and I am happy to say that he is on his way to big things. He has gained 100% head control and his core strength has improved dramatically. He is able to bear weight through all four limbs which means he is not only standing with assistance but has begun to learn how to take a step here and there. He has gained enough strength and mobility through his shoulders, arms, and hands to be able to bring objects to his mouth and hold and shake a baby rattle which we were not sure he would ever do. He is no longer dead weight when we lift him as he can now crunch his abs and try to help wrap his legs around us for support. Noah has learned how to flip from stomach to back and vice versa and how to help pull himself forward wanting to get into a sitting position, which shows us that he has desire. A cognitive response that, once again, we were never sure we would see. ...
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When it comes to X-bar theory, it is true that the theory of projection from a lexical head turned out not to explain as much as the hopes expressed in Jackendoffs 1977 book. But I contest the characterization nothing has replaced those bold ideas and [we have] no clear progress in understanding what drives these kinds of phenomena. X-bar theory was supplemented in the 80s and 90s by theories of functional heads and extended projections, using tools like the Mirror Principle originally explored by Baker and the incipient theory of head movement and developed in a huge number of works exploring the properties of individual functional heads like D and Num and C and T and Asp but also in works developing the broader theory of the extended projections of the clause and noun phrase by people like Grimshaw, Cinque, Travis, Ritter, Wiltschko, and many others. As for the unification of binding and movement, I would say the central facts still underlie the generative focus on structure as a central ...
Objective: In this study we will develop and apply imaging techniques to perform the first three-dimensional (3-D) measurements of brain biomechanics during mild head movement in healthy human subjects. Biomechanics is the application of mechanics, or the physical principles in action when force is applied to an object, to the anatomical structure and/or function of organisms. Such techniques will be invaluable for building computational models of brain biomechanics, understanding variability of brain biomechanics across individual characteristics, such as age and sex, and determining brain sub-structures at risk for damage when movement of the head is accelerated, such as during a traumatic event.. Study Population: Measurements will be performed on 90 healthy men and women aged 18-50.. Design: We will build upon the model pioneered by our collaborator, Dr. Philip Bayly. The model places a human subject in a magnetic resonance (MR) scanner with one of two head support units that allows a ...
Dr. Robert Hubbard, brother-in-law to NASCAR driver Jim Downing, had seen this sort of injury before. He became aware of the lack of protection surrounding the head and neck of drivers during a crash, and sought to build a restraint that would keep the head stable in a collision. Downing began wearing the device -- at the time a bulky piece that limited head movement that was worn over the shoulders but under the seatbelt. The device snapped onto the sides of the drivers helmet, ensuring the head couldnt move too far without the shoulders. By the time NASCAR mandated the device, Hubbard and Downing had turned their invention into something that drivers could wear almost unnoticed ...
Over the past week Justin and I have been noticing new physical movements from Vada. Some of them seem to be typical for her. She seems to enjoy smacking her lips together and for the most part when she does this it seems to be somewhat voluntary. We have also noticed her eyes are doing some rolling and she has displayed some odd head movements. There has been two occasions (that I can remember) where she looked liked she had jack knifed, once Justin was the one to first notice the movements. I hate feeling like I am the only one dealing with this and seeing this. I am constantly in conversations that make me feel as if the other person thinks that I am over reacting. Maybe I am or maybe I am just defensive but when Justin is right there next to me, witnessing the same thing that I am, I just feel more self assured ...
The cervical spine consists of seven vertebrae and is located at the base of the skull. Its function is to support the skull, enabling head movements back and forth, and from side to side, as well as protecting the spinal cord. The upper section of the cervical spine consists of
Ive had vertigo for a week now. It is most evident when I make a major head movement as when I lie down, turn over in bed, bend over, or get up in the
The cervical spine consists of seven vertebrae and is located at the base of the skull. Its function is to support the skull, enabling head movements back and forth, and from side to side, as well as protecting the spinal cord.
Philadelphia collar supports are boon for cervical patients as it inhibits the neck or head movement and prevents the further injury. Buy now to get advantages today!
Natalie Kunicki, a 23-year-old paramedic from the UK, was left partially paralyzed after involuntary head movement caused her vertebral artery to burst.
Download Gaze Tracking Library for free. The Gaze Tracking Library is a framework for open source eye tracking using off-the-shelf components, such as webcams and videocameras. It supports both head-mounted and remote setups.
This is the fourth installment of a series of stories previewing the Reds Spring Training. CINCINNATI -- More than ever, Major League teams can only go as far as their starting pitching takes them. For a still-developing group of pitchers entering this season, that will mean the Reds demanding a lot from several young players. How far they can go is certainly a question without an answer, but it would not be realistic at this point to think its a playoff-caliber group just yet.
My 10 year old son had sudden onset central blind spot in his left eye- happened 8/21- he said lasted about 20-40 min. - Answered by a verified Eye Doctor
Hello out there.· Does anyone know of a series of command strings that can instruct a Parallax continous rotation servo to do one full 360 rotation and then …
Transformations of the underlying movement control of rapid sequential (reversal) responses were examined as the movement amplitude (Experiment 1) and mome
2.10 Shoulder elevation and head-turning (XI). *2.11 Tongue movement (XII). *3 Clinical significance *3.1 Examination ... Eye movement (III, IV, VI)[edit]. Various deviations of the eyes due to abnormal function of the targets of the cranial nerves ... Norton, Neil (2007). Netter's head and neck anatomy for dentistry. Philadelphia, Pa.: Saunders Elsevier. ISBN 978-1-929007-88-2 ... Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.[2 ...
Galloway, Andy (25 June 2018). "SIGNING NEWS: ROSS PERRY HEADS TO DUMBARTON". Dumbarton Football Club. Galloway, Andy (11 May ... 2019). "SQUAD MOVEMENTS". Dumbarton Football Club. "New Signing". Facebook.com/DarvelJuniorsFC. 6 June 2019. Ross Perry at ...
"Raiders utility Chalk headed for Wales". The Age. 25 July 2008. Retrieved 26 July 2008. "2009 NRL Player Movements". NRL Live. ...
Neck movements accompany singing. When breathing out the head is leaned forward. The head is tilted back for an inward breath. ... As males have their heads shaved at the passage from one stage of life to another, a bride to be will have her head shaved, and ... Head shaving is common at many rites of passage, representing the fresh start that will be made as one passes from one to ... It is dressed with animal fat and ocher, and parted across the top of the head at ear level. Hair is then plaited: parted into ...
The opposition movement told Al Jazeera that they had hundreds of thousands of people, in over fifteen provinces in Yemen, ... The head of the Council of Islamic Clerics and Yemen's Muslim Brotherhood Abdul-Majid al-Zindani joined the protesters. ... Head, Jacqueline (23 March 2011). "Fear of the Future in Yemen". Al Jazeera. Carapico, Sheila (24 May 2011). "No Celebration of ... This section of the timeline includes the inception of the protest movement in January 2011 and its growth into a full-fledged ...
Languages portal Hindi-Urdu controversy Bengali Language Movement Bengali Language Movement (Barak Valley) Bengali Language ... The Official Languages Act was eventually amended in 1967 by the Congress Government headed by Indira Gandhi to guarantee the ... "Language Movements Against Hindi as An Official Language". Language movements in India. Central Institute of Indian Languages. ... The agitation was backed by Periyar's Self-Respect Movement and Justice Party. It also had the support of Tamil scholars like ...
The Alliance, headed by a 116-member "consultative council", vowed to defend protesters and announced a de facto mutual defence ... Al Jazeera reported that sources within the opposition movement said opposition leaders had met with Acting President Hadi to ... Sadiq al-Ahmar, the head of the Alliance of Yemeni Tribes, told media that he had ordered tribal militias not to respond even ... Head, Jacqueline (23 March 2011). "Fear of the Future in Yemen". Al Jazeera English. Carapico, Sheila (24 May 2011). "No ...
... with the left arm above the head and right along the thigh: the movement of the garment is very well made. It is found on a ... The head of the Centaur, present on the drawing attributed to Carrey, has since disappeared. On the other hand, the head of ... However, if the metope is in the British Museum, the Lapith's head is kept at the Acropolis Museum in Athens. This head is ... Above his head, in the right hand, he holds a weapon (spear?) with which he is about to strike his enemy. This metope is almost ...
"Top Designers Are Cozying Up To Fake Furs Anti-fur Sentiment In Milan May Lack The Fire Of The U.s. Movement. But In Fall Shows ... CS1 maint: discouraged parameter (link) Suzy Menkes (April 20, 1999). "Head To Foot: Essence Is Detail". International Herald ... CS1 maint: discouraged parameter (link) "Nicola Trussardi; Head of Italian Fashion Accessories Firm Dies in Traffic Accident". ... CS1 maint: discouraged parameter (link) "Head of Italian fashion house dies , Irish News , Breaking News from Ireland". ...
On 17 March, Reading headed to Barnsley, and after a goalless first half, early second half goals from Jobi McAnuff and Jem ... "Whites squad update - player movements". Salisbury City F.C. Archived from the original on 11 June 2012. Retrieved 20 December ... Cannings, Phil (29 September 2011). "Hungerford head for Weymouth". Newbury Weekly News. Archived from the original on 16 ...
The head comprises nearly half of the fetus' size. The face is well formed. The eyelids close and will not reopen until about ... Spontaneous limb movements may be detected by ultrasound. All essential organs have at least begun. The vitelline duct normally ... The fetus reaches a length of about 15 cm (6 in). A fine hair called lanugo develops on the head. Fetal skin is almost ... Head hair is now coarse and thickest. William J. Larsen (2001). Human embryology. Edinburgh: Churchill Livingstone. ISBN 978-0- ...
Movements are large and jerky. Raises head and upper body on arms when in a prone position. Females have more arm synchronous ... Turns head side to side when in a supine (face up) position; cannot hold head up and line with the body. Upper body parts are ... Responds to simple questions with "yes" or "no" and appropriate head movement. Speech is 25 to 50 percent intelligible during ... Circumference of head and chest is equal; head size is in better proportion to the body. "Baby fat" disappears as neck appears ...
... the Catholic Worker and the Movement". In Brian Head; James Walter (eds.). Intellectual movements and Australian society. ... Charlesworth opposed the anti-communist 'Movement' during the 1950s and 1960s, led by B. A. Santamaria's. He considered that ... The Aboriginal Land Rights Movement, Hodja Educational Resources Cooperative, 1984. Religion in Aboriginal Australia : an ... the Movement's insistence that Christian values should have a privileged place in society distorted the proper relationship ...
This was a head mounted display (HMD) that was meant to immerse users into a computer simulation. It could track head movements ... The DataSuit was a full-body outfit with sensors for measuring the movement of arms, legs, and trunk. R&D team Jaron Lanier ... It was interactive and contained fiber-optic bundles to track movements and orientation. That data would then be transmitted to ...
His head was small, but well-shaped; his forehead broad and prominent, but not high. He was tall, burly, and broad-shouldered; ... When he tried to tell a joke or relate a comic story, it was pain and misery to listen; when he danced, his movements were ... all his movements were quick; his walk, his conversation, his expression, everything he did, was marked with an energy which ...
In close-ups, she gave the impression, the illusion of great movement. She would move her head just a little bit, and the whole ... innermost feelings through her movement, gestures, and, most importantly, her eyes. With the slightest movement of them, he ... She "lowers her head to look calculating or flutters her lips", he says. "Her face darkens with a slight tightening around the ... Worlds turned on her movements." During this period, Garbo began to require unusual conditions during the shooting of her ...
His movements are apelike. The Moor seduces the Ballerina and later savagely cuts off the head of the puppet Petrushka. When ... The appearance of these blackfacers is evidence of the popularity of the hip-hop movement in Japan despite what is described as ... In the United States, blackface declined in popularity beginning in the 1940s and into the civil rights movement of the 1950s ... With the eventual successes of the modern day Civil Rights Movement, such blatantly racist branding practices ended in the U.S ...
Pais Movement. 2012-06-18. Retrieved 2017-04-30. Mr. Robert Siaw Ntiamoah is the new head teacher of Saviour Presby School in ... As head teacher, Robert Siaw Ntiamoah introduced a Pais programme into the school. "Mr. Robert's Story - A Pais Program for my ...
"MAIR HEADS TO THE ROCK". dumbartonfootballclub.com. Dumbarton F.C. 3 July 2014. Retrieved 5 February 2017. "CAMPBELL BECOMES A ... "SQUAD MOVEMENT". dumbartonfootballclub.com. Dumbarton F.C. 30 December 2014. Retrieved 5 February 2017. "MARKO RELEASED". ... "MCGINN HEADS TO DENS". dumbartonfootballclub.com. Dumbarton F.C. 20 June 2014. Retrieved 5 February 2017. "PRUNTS MOVES ON". ...
CS1 maint: discouraged parameter (link) "Sochi Olympics Chief Named Head of Russia's Gazprom Media , News". The Moscow Times. ... Paralympic Movement. Retrieved October 1, 2017. CS1 maint: discouraged parameter (link) https://variety.com/exec/dmitry- ...
American Independent Movement (Conn.) (January 1970). AIM: bulletin of the American Independent Movement. The Movement. p. 78. ... Golden, Kristen (Oct 1999). "Head of the Class". Ms. Magazine. "Mimi Abramovitz". National Council for Research on Women. 2012 ... She became active in the American Independent Movement, an organization who summarizes their goal, "The American Independent ... Movement (AIM) has been working since 1966 to get people together against the rich, powerful few who run New Haven and the ...
Its energetic mascots with green-pointed heads, promoted the chewy gum's healthy aspects. Simulated Movements. New York Public ... He was head of W.Va. Wesleyan College, 1915-22. It's verified through the name-pairing, in the following sources as a whole. ... Heading: "Transfer Fisk Assets to U.S." History of the United States Rubber Company by Babcock, 1966 pp. 97 (AKA), 410-11 (name ... Heading: "Women to Meet at Nets." American Lawn Tennis, July 15, 1924 p. 249. Lake George Mirror, Aug. 16, 1924 p. 9; July 18, ...
Two over-lapping movements developed; "one was rational and theoretical in approach and was headed by Rene Descartes; the other ...
Their movements are quick and insectlike. They are the builders and technicians of Malacandra. They build houses and gadgets ... 18). The pfifltriggi (singular pfifltrigg) have tapir-like heads and frog-like bodies; they lean their elbows on the ground ... The Bodley Head. Five years later it was published in the U.S. (MacMillan, 1943). Two sequels were published in 1943 and 1945, ...
She served as the head of women's affairs at the Ministry of Interior. Along with Azar Mansouri and late Farideh Mashini, she ... Povey, Tara (2016). Social Movements in Egypt and Iran. Routledge. p. 85. ISBN 9781137379009. "Patriots and Reformists: Behzad ...
Eva's head shows very realistic moods and emotions and short term memory. Eva has also performed in a play in the Roten Fabrik ... Nadine has a total of 27 degrees of freedom for facial expressions and upper body movements. With persons it has previously ... Nadine has a head and full body with a natural appearance. Nadine software platform which has been developed at the Institute ... Nadine is a next-generation humanoid robot that is a successor from Eva, a humanoid robot head manufactured by Hanson Robotics ...
Nice, Margaret M. & Schantz, W.E. (1959). "Head-scratching movements in birds" (PDF). The Auk. 76 (3): 339-342. doi:10.2307/ ... and then scratch the oil into the feathers on their head. Longer-necked birds may rub their head directly on their uropygial ... The heads of these birds typically show little pink, because of the difficulty of reaching those areas with preen oil. The ... Birds cannot use their beaks to apply preen oil to their own heads. Instead, many use their feet in an action called scratch- ...
The texts for the movements are: I saw a dream. Images upon my bed and visions in my head frightened me. (Daniel 4:2, or 4:5 in ... The first and third movements quote verses from the biblical book of Daniel, while the second and fourth movements use the ...
Derek Arthur Dean, Head Porter, University of Leeds. For services to Education. Peter Robert Dee. For services to the community ... For services to the Credit Union Movement, the public service and sport. Civil Division Teresa Padron Aragon. For services to ... Philip Stephen Gilbert, Head of Events Programmes, BBC. For services to the VE/VJ Day Commemorations. Archibald Gilchrist. For ... Michael John Horne, Head of Information, World War II Commemorations Team. For services to the VE/VJ Day Commemorations. ...
Ross Pearson and Swanson went head-to-head on June 22 at UFC on FX 4. Swanson won the fight via TKO in the second round, ... Swanson's movements are very unorthodox. He tends to feint while punching, as exemplified in WEC 52. Swanson often switches ... Swanson often sets up with a left hook, then follow up with a ducking roundhouse kick to the head. This combination was used ... Frankie Edgar rematch headed to UFC-Atlantic City". mmajunkie.com. Retrieved March 20, 2018. "UFC Fight Night 128 results: ...
In the United States of America a radical Sunday School movement linked to the German-American socialist movement emerged in ... headed by William Kruse, published an organizing manual for party locals seeking to establish Socialist Sunday Schools, ... a b c Patti McGill Peterson, The Young Socialist Movement in America from 1905 to 1940: A Study of the Young People's Socialist ... a b c Christiane Harzig, "The Role of German Women in the German-American Working-Class Movement in Late Nineteenth-Century New ...
A large group of researchers headed up by Dr. Hershel Toomim and his wife Marjorie have repeatedly found that NIR HEG training ... Less subject to surface artifacts, such as eye and facial movements. *Capable of at-home training due to smaller, more portable ...
political head. ministers. *Office of the Minister of Defence for the Royal Navy (1964-1967) ... Department of Fuel Movements and Transport (Naval). *Department of Dockyards and Fleet Maintenance *Dockyard Division ... Assistant Chief of Staff Medical/Head of the Royal Naval Medical Service/Medical Director General (Navy) ...
... but only at the ipsilateral side of the head.[10][11] Ipsilateral indicates the same side of the head as where the suture is ... A compensatory mechanism involves the movement of cerebrospinal fluid from the cranial vault towards the spinal cord.[21] The ... The head circumference and the growth curve of the head provide important clues into making a differentiation between ... Oxycephaly, also known as turricephaly and high-head syndrome, is a type of cephalic disorder. This is a term sometimes used to ...
When Boas retired in 1937, most of his students considered Ruth Benedict to be the obvious choice for the head of the ... and to keep quiet when asked for information about troop movements, etc., while Japanese POWs, apparently, gave information ... was named head of the department.[14] Benedict was understandably insulted by Linton's appointment and the Columbia department ... the shape of our head, the texture of our hair. "The races of mankind are what the Bible says they are-brothers. In their ...
a b Nimura, K. The Formation of Japanese Labor Movement: 1868-1914 (Translated by Terry Boardman). Retrieved 11 June 2011 ... Labour unions typically fund the formal organization, head office, and legal team functions of the labour union through regular ... Davies, A. J. To Build a New Jerusalem: Labour Movement from the 1890s to the 1990s (1996). ... Catholic Labor Movements in Europe. Social Thought and Action, 1914-1965 (2015). online review ...
In 1963, the Arya Samaj movement's present building at Syed Alwi Road was opened by Mollamal Sachdev, whose family gave ... to mark the 101 years of Arya Samaj movement.[4] ...
An unpublished manuscript, copied by an amanuensis, and headed Declaratio breuis, &c., is in the Royal manuscripts, British ... Fludd extended this interaction to his conception of disease: the movement of Spirit between the macrocosm and microcosm could ...
The movement of mineral nutrients is cyclic, whereas the movement of energy is unidirectional and noncyclic. Trophic species ... "Turning up the head: Temperature influences the relative importance of top-down and bottom-up effects" (PDF). Ecology. 91 (10 ... "the continued movement of the particles of earth". Even earlier, in 1768 John Bruckner described nature as "one continued web ... "the continued movement of the particles of earth". Even earlier, in 1768 John Bruckner described nature as "one continued web ...
The respective finger may be misaligned, and movement of that finger may be limited and painful. ... Boxer's fracture of the 5th metacarpal head from punching a wall. Specialty. Emergency medicine, orthopedics. ...
Sampson, W. (1995). "Antiscience Trends in the Rise of the "Alternative Medicine" Movement". Annals of the New York Academy of ... since they are all classified under the one heading of alternative medicine.[182] ... Use of alternative medicine in the west began to rise following the counterculture movement of the 1960s, as part of the rising ... Manipulative and body-based practices: feature manipulation or movement of body parts, such as is done in bodywork, ...
The fight is ended by the loser, who either lays his head and neck flat on the ground, or turns tail and is chased out of the ... These canines are held loosely in their sockets, with their movement controlled by facial muscles. The buck can draw them ... Neither the head nor the tail poles are well differentiated as in gregarious deer; consequently, this deer's coat is little ... Each would try to wound the other on the head, shoulders, or back, by stabbing or tearing with his upper canines. ...
Many of the resettled Marsh Arabs have gained representation through the Hezbollah Movement in Iraq; others have become ... worn twisted around the head in a turban, as few could afford an ʻiqāl. ... followers of Muqtada al-Sadr's movement, through which they gained political control of Maysan Governorate.[25] Political ...
Mok rallied troops loyal to him at Anlogn Veng, informing them that Pol Pot had betrayed their movement and then headed to Kbal ... In June 1970, Sâr left Vietnam and reached his K-5 base.[165] In July he headed south; it was at this point that he began ... Initially, KNUFNS was headed by Heng Samrin.[336] Fearing this Vietnamese threat, Pol Pot wrote an anti-Vietnamese tract titled ... In declining health, Pol Pot stepped back from many of his roles in the movement. In 1998 the Khmer Rouge commander Ta Mok ...
The outside heads mix with water, but the tails reject water. Other proteins and lipids can be added to the cell membrane. By ... The movement of substances across the membrane can be either passive, occurring without the input of cellular energy, or active ... This has two layers of phospholipid molecules with phosphate heads on the surfaces and lipid (oil) tails on the inside. ...
Bengali Hindu Homeland MovementEdit. Main article: Bengali Hindu Homeland Movement. The Bengali Hindu Homeland Movement refers ... After M. S. Golwalkar became head of RSS in 1940. RSS didn't take part in many anti-British activities, as Golwalkar did not ... Independence movementEdit. The influence of the Hindu renaissance movements was such that by the turn of the 20th century, ... Movements that saw a large presence of volunteers included the Bhoodan, a land reform movement led by prominent Gandhian Vinoba ...
The post-autistic economics movement (French: autisme-économie)[1] or movement of students for the reform of economics teaching ... The French minister of education appointed a panel headed by Jean-Paul Fitoussi to inquire into economics teaching.[7] In 2000 ... "In Fullbrook, Edward (ed.). The crisis in economics: the post-autistic economics movement: the first 600 days. p. 47. ISBN ... 2003). The crisis in economics: the post-autistic economics movement: the first 600 days. Psychology Press. ISBN 0415308976. . ...
A reflex or reflex action is an automatic and fast movement in response to a stimulus.[1] ... Texas man nearly dies after being bitten by severed snake head. BBC News. [1] ...
Women wear colored dresses and spangled head scarves and young men wave flags of green, yellow and red, the historic colors of ... Those ancient traditions also gain new input from youth movements called Rodnovercy. The Russian composer Igor Stravinsky ... as the authorities take action against suspected supporters of the Kurdish rebel movement, the PKK.[118] The holiday is now ...
The modification has been accepted only by a part of the reintegrationist movement at this point. ... It was headed by three main authors: Rosalia de Castro, an intimist poet; Eduardo Pondal, of nationalist ideology, who ... belonging to the Reintegrationist movement, support the idea that differences between Galician and Portuguese speech are not ... reintegrationism is only a small force within the Galician nationalist movement. ...
... starting the Bengali language movement.[33] The Bengali Language Movement was a popular ethno-linguistic movement in the former ... As a head-final language, Bengali follows subject-object-verb word order, although variations to this theme are common.[68] ... The Central Shaheed Minar in Dhaka commemorates the Bengali Language Movement. UNESCO commemorates the movement as ... "The Language Movement : An Outline". Archived from the original on 2012-11-19. Retrieved 12 May 2016.. ...
This fusion of, and tension between, clear-headed analysis and romantic feeling is typical of Stendhal's great novels; he could ... Literary movement. Realism. Contents. *1 Life. *2 Pseudonyms. *3 Works *3.1 Novels ...
talk , contribs)‎ (→‎Consumer law: typo, heading). *(diff , hist) . . Transphobia‎; 10:18 . . (+1)‎ . . ‎. 71.38.50.130. (talk) ... Retrieved from "https://en.wikipedia.org/wiki/Special:RecentChangesLinked/Disability_rights_movement" ...
... was founded by participants of the 1978 Chinese Democracy Wall Movement and the 1989 Democracy Movement. Founded in 1998, it ... Head of state: Xi Jinping. *Head of government: Li Keqiang. *Congress Chairman: Li Zhanshu ...
... overall control of the automation machinery and allows cranes to be connected to conveyors for seamless stock movements. ... Get Your Head Out of the Clouds *Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, .mw-parser-output ...
Firing shrapnel over the heads of friendly troops, in 10 minutes it cleared a nearby wood of French tirailleurs, much to the ... 1918 saw greater action as the war of movement resumed, including the German Operation Michael (March, the Battle of St. ...
The movement of so many chloroplast genes to the nucleus means that many chloroplast proteins that were supposed to be ... just like if you were headed for the extracellular space. In those cases, chloroplast-targeted proteins do initially travel ...
... are sexually dimorphic, with females being smaller in size and more slender than males.[2][14] The head-and- ... This is usually followed by movements such as standing in a reverse-parallel position, in which one male urinates and the ... The black wildebeest is typically 170-220 cm (67-87 in) in head-and-body length, and the typical weight is 110-180 kg (240-400 ... appear on the head. These later develop into horns, which reach a length of 200-250 mm (8-10 in) by the fifth month and are ...
He doesn't exactly add lustre to the Royal diadem."[74] There were calls for an official enquiry, the head of campaign group ... "Royal Support for the Scouting and Guiding Movements". Official Website of the British Monarchy. Archived from the original on ...
This movement, according to commissioner Trevor Loke, was aimed to make everyone feel welcomed and included: "We think that the ... The Me Too movement has underscored that sexual harassment disproportionately affects women and girls and remains a pressing ...
3D orienting head movements in freely moving rats affect activity in the area of the brain responsible for vision in manner ... For instance, they only measured the movement of the head, and did not measure eye movement. The study is also based on rodents ... The results of the study are published in Neuron, in the article, "Encoding of 3D Head Orienting Movements in the Primary ... In fact, the researchers describe two sets of movement-related patterns in the visual cortex that are based on head motion and ...
Keeping your head still causes tension and promotes a reverse pivot. Butch Harmon shows how to let it move naturally as you ... Head Movement Keeping your head still causes tension and promotes a reverse pivot. Butch Harmon shows how to let it move ...
... "pigeon head camera." We present the performance of the mantis head camera and pigeon head camera models and provide ... Side-to-side head movements to obtain motion depth cues: A short review of research on the praying mantis. Behavioural ... Head movements and eye functions of birds. J. Comp. Psychol., 11:99-113.Google Scholar ... we create miniature models for depth estimation that are similar to the head movements of these animals. We develop ...
... people move their heads in typical ways. The pattern of head gestures and their function in conversation has been studied in ... can explain the variety in functions that are served by the multitude of movements that people display during conversations. 1 ... The analysis of movement behavior during the clinical interview - Freedman - 1972 23. Kinematics of head movement accompanying ... allows the same general head movements. The head can nod up and down, rotate horizontally left and right and tilt at the neck ...
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... and a pigeon wishes just once it could complete a head … ... Pigeon Wishes Just Once It Could Complete Head Movement ... and a pigeon wishes just once it could complete a head … ...
Jewish farming movement heads west. By Sue Fishkoff September 28, 2010 3:32 am ... They have become rabbis, Jewish educators and heads of Jewish nonprofits, as well as formed the core of what is now known as ... "This is a great next extension for the movement," said Nati Passow, the director of the Jewish Farm School, a nonprofit that ... the new Jewish food movement.. "The Adamah program has been an incredible success - not just transforming the lives of the ...
Eye Movements. Unusual head movements may also help a child adapt to uncontrolled eye movements. Involuntary eye movements, a ... Head Movements. A child may position his head to compensate for eye misalignment that may occur with conditions such as a "lazy ... Abnormal Eye and Head Movements in Children by KATE BECK Last Updated: Aug 14, 2017. ... An abnormal eye or head movements may also stem from a "tic," a condition common in children. A child with a tic may squint, ...
The alt-right is a movement that doesnt care who it offends. It knows racism and sexism are overused to the point of ... This is the most explosive movement in America in decades, regardless of the result of the election, and its a cultural force ... Rolling Stone magazine says the movement is populated by fans of Donald Trump looking to "reshape American politics by ... While the mainstream media is fixated on the racial aspect of the alt-right movement, Yiannopoulos estimates only 10 percent of ...
Film students head to Paris, study film movement. This semester, 13 students embarked on the French New Wave Project, a program ... Inspired by experimentation with the film medium, the French New Wave movement captured the essence of French youth in the late ... getting the full cultural context of the whole film movement and being New Wavists, its this holistic approach. ... by LSU Academic Programs Abroad to engross students in the understanding and application of the French New Wave film movement ...
... If a child has many different tics, and also makes repeated noises like grunts, ... He puts his chin down onto his chest together with a twitch of the head. This lasts for three to five seconds and then all is ... The problem you describe in your son sounds like a tic - a sudden, rapid and involuntary movement of a group of muscles. ... If your sons facial movements arent troubling you or him too much, you could probably afford to just wait and see what ...
HEAD MOVEMENTS GIVE AWAY FORAGING BEHAVIOUR Message Subject (Your Name) has sent you a message from Journal of Experimental ...
... January 17, 2019 , Trevin Wax ... But the pro-life movement today is at a crossroads regarding how expansive its focus should be and what strategy will be most ... The existence of a vibrant pro-life movement 46 years after the Supreme Courts sanction of elective abortion marks it out from ... What does it mean to be pro-life? Should the focus of the movement be on ending abortion or something broader? ...
Its also a quick run down of recent events at Happy Nappy Head and hopes for the future. ... This is an intro into the BlackGrassRoots Movement Ive started and its goals. ... This is an intro into the BlackGrassRoots Movement Ive started and its goals. Its also a quick run down of recent events at ...
A doll includes a plush doll body having a movable head. A body housing within the doll body supports a control and sound ... and engages head coupler 66. of head housing 40. . Thus, head housing 40. is pivotally movable in response to pivotal movement ... triggers a movement of head housing 40. and head 12. in the direction indicated by arrow 34. . Conversely, the operative ... The result of this action is a movement of the head of doll 10. in the manner described above in FIG. 2. to produce a head ...
The aim of this chapter is to focus on the huge extent to which eye-head movements mirror specialized functions of the ... Eye and Head Movements as Specialized Functions of Vestibular Circuits. Chapter:. (p.241) Chapter 37 Eye and Head Movements as ... Chapter 95 Head Kinematics during Complex Movements * Chapter 96 Head-Forelimb Movement Coordination and Its Rearrangement in ... Chapter 95 Head Kinematics during Complex Movements * Chapter 96 Head-Forelimb Movement Coordination and Its Rearrangement in ...
... does anyone notice that dynamic head movement on the 737 NGX in P3D is MUCH more prevalent than the 777 !? Is DHM adjustable ... Dynamic head movement By xkoote, March 12, 2015. in PMDG 737NGX , 737NGXu ... Actually, I just noticed that the dynamic head movement has completely disappeared with the latest 737 SP! I do not fly much ... does anyone notice that dynamic head movement on the 737 NGX in P3D is MUCH more prevalent than the 777 !? ...
150mm ball or Mitchell or flat head, counterbalance which support heavy payloads at AbelCine. ... Rent or buy fluid heads for your camera with 75mm, 100mm, ... OConnor 2575D Fluid Head Package * Up to 90 lb (40.8 kg) max. ...
... one of my pullets started shaking her head, kind of like a horse whinnying, if that makes sense. It happens every couple of... ... normal head movement? or parasites? Discussion in Managing Your Flock started by wahmommy, Feb 9, 2013. ... Also, when I say whinnying, its only the movement side to side, they dont throw their heads back like horses do. ... but if the head movement is mite related then it doesnt matter right? Also, just to make matters more interesting, in the last ...
... and shoulder geometry in the planning of accurate arm movements ... Role of eye, head, and shoulder geometry in the planning of ... that eye movement pattern influences the execution of limb movements (=-=Henriques & Crawford, 2002-=-; van Donkelaar, 1997). ... Previous research has also showed a significant influence of eye movements on the execution of limb movements similar to the ... Previous research has shown for example that saccadic eye movements can increase the accuracy of limb movements when performed ...
Neural Control of Eye-head Movements Figure 1. Head, eye, and gaze position are plotted as functions of time during a. 60 ... We are currently studying the role of the brainstem in eye-head coordination, cerebellar contributions to eye-head movements ... distinguish our movements from the movements of objects in the world, and coordinate our own movements in order to orient, and ... head contributed ~10 degrees to the overall change in gaze direction during this movement.. The remaining 50 degrees of the ...
Right-Left Asymmetries in the Whisking Behavior of Rats Anticipate Head Movements. R. Blythe Towal and Mitra J. Hartmann ... Correction for Towal et al., Right-Left Asymmetries in the Whisking Behavior of Rats Anticipate Head Movements - October 04, ... of the world would seem to require that rats adjust the bilateral symmetry of whisker movements in response to head movements. ... Right-Left Asymmetries in the Whisking Behavior of Rats Anticipate Head Movements ...
... head-snapping\ generational change with younger evangelicals \revolting\ against the tone of the Christian Right, says a ... Evangelical Movement at Head-Snapping Moment, Says Scholar. Evangelical Movement at Head-Snapping Moment, Says Scholar. By ... The evangelical movement is at a "head-snapping" generational change with younger evangelicals "revolting" against the tone of ... But Gerson quickly clarified that the movement to care about a broader set of issues, beyond abortion and family, is not an ...
A union head representing local broadcast journalists testified to the Seattle City Council claiming their journalists support ... By so publicly endorsing the defund Seattle police movement, Allen makes it easy for the public to distrust local media members ... Defund Seattle police? Union heads says reporters back it. Announcing herself as the executive director of the union, Allen ... Speaking on behalf of the membership, Allen very clearly and specifically endorsed the defund movement. But the spokesperson ...
... Joseph ... Supplementary Figure 1 analyzes the coupling of respiration to head movements while the rats perform sniffing behavior while ...
head acceleration. The falling phase of the cycle matches with head approach, while the rising phase matches head withdrawals. ... and 80 cycles) and of head movements to respiration (Figure 6(f), PLVs for and at exhalation peaks = 0.11 and 0.07, and 0.76, ... such that the head acceleration signals would be dominated by head approach/withdrawal and not by the stride movements (see ... both for alignment of respiration to head movements (Figure 6(e), PLVs for respiration at peaks of and = 0.1 and 0.11, and 0.39 ...
Dance/movement therapy in the rehabilitation of individuals surviving severe head injuries. ... 1.Dance/Movement TherapyCalifornia State UniversityHayward. *2.Dance/Movement Therapist, Therapeutic Recovery Program ... Di Joseph, L.Traumatic Head Injury: Mechanisms of Recovery. Workshop presented at Santa Clara Valley Medical Centers Third ... Generelli, T.Recent Developments in Acute Pathophysiology of Head Injury. Paper presented at Braintree Hospitals Fifth Annual ...
Archives,NO FARMER-LABOR PARTY.; But Head of Movement Suggests Action to Elect Congressmen. ... NO FARMER-LABOR PARTY.; But Head of Movement Suggests Action to Elect Congressmen. ...
In experiment 1, participants observed first the figure with the head straight and then reproduced it with the head either ... Participants head was either aligned with the trunk or tilted 30° towards the left or right shoulder. ... Results of Experiment 1 and 2 showed deviations of the motor reproduction in the direction opposite to the head in both the ... In Experiment 2, participants observed the figure with the head in the position in which the figure was later reproduced. ...
During flight, roll movements of the thorax are compensated by counter rolls of the head relative to the thorax. The yaw turns ... 1980). Head movements in flies (Calliphora) produced by deflexion of the halteres. J. Exp. Biol 85, 43-.. ... 1977). On head and body movements of flying flies. Biol. Cybernetics 25, 177-.. ... 1973). Head movements of flies during visually guided flight. Nature 243, 299-.. ...
  • It was expected that the participants ' rhythmic movements would become entrained to the oscillating stimulus in both conditions but that visual tracking would strengthen this entrainment. (psu.edu)
  • Rats use rhythmic movements of their vibrissae (whiskers) to tactually explore their environment. (jneurosci.org)
  • These studies will facilitate a clearer understanding of the neural mechanisms that mediate the control of coordinated movements. (rochester.edu)
  • Because the vibrissae can move independently of the head, however, maintaining a stable perception of the world would seem to require that rats adjust the bilateral symmetry of whisker movements in response to head movements. (jneurosci.org)
  • Understanding how the mouse's brain controls whisker movements may tell us about neural control of finger movements in people. (medindia.net)
  • The head can nod up and down, rotate horizontally left and right and tilt at the neck from side to. (psu.edu)
  • I have experienced wry neck before but this is not the usual head twisting associated with this. (backyardchickens.com)
  • I'm not sure that antibiotics are necessary, since it appears to be abnormal neurological movement probably from a head or neck injury. (backyardchickens.com)
  • A hyge sled test program was then conducted to evaluate the effects of the head surround on occupant head and neck loads during crash simulation. (sae.org)
  • We performed a maximal head-neck movement trial on 50 adult patients, American Society of Anaesthesiologists 1 or 2. (clinicaltrials.gov)
  • We've seen how the head carries sense and meaning, so the shoulders and neck must be free, poised and flexible. (megahowto.com)
  • Maximum head rotation to the left and rotation to the left combined with hyperextension of the neck were investigated using a structural finite element model. (uzh.ch)
  • Head nodding is a regular rhythmic movement of the head and neck, which may be up-and-down, side-to-side, or shoulder-to-shoulder. (medscape.com)
  • This study investigated the role that visual tracking plays in coupling rhythmic limb movements to an environmental rhythm. (psu.edu)
  • Previous research has shown for example that saccadic eye movements can increase the accuracy of limb movements when performed simultaneously (Abrams, Meyer, & Kornblum, 1990). (psu.edu)
  • Spontaneous limb movements were quantified using six indices. (springer.com)
  • Quadrupedal mammals typically synchronize their respiration with body movements during rhythmic locomotion. (hindawi.com)
  • Moreover, all of them synchronize into a common cycle, with inhalation, vibrissae protraction, and head approach being followed by exhalation, vibrissae retraction, and head withdrawal [ 1 ]. (hindawi.com)
  • This suggests that the hippocampus receives inputs phase-locked to the head movements, e.g. through the vestibular system, and that these inputs effectively forces the theta rhythm to synchronize to the dynamics of locomotion. (biomedcentral.com)
  • A single LPGi neuron is connected to motor neurons on both sides of the face, putting them in perfect position to synchronize the movements of left and right whiskers. (medindia.net)
  • His creation, HeadGaze , relies on the iPhone X's front-facing sensor array (via ARKit) to track the user's head movements. (techcrunch.com)
  • One advantage of the PCCR method is the high accuracy it achieves in gaze tracking because it compensates for the pupil center position based on the relative position of corneal specular reflection (SR). However, the PCCR method only works for user head movements within a limited range, and its performance is degraded by the natural movement of the user's head. (mdpi.com)
  • Grohs, T. and Archer, S., "Head Impact Protection Developments in the F1 Cockpit with Investigations to Correlate Head Movement to Brain Injury," SAE Technical Paper 2000-01-3558, 2000, https://doi.org/10.4271/2000-01-3558 . (sae.org)
  • We also tracked participants' rotational head movements as they watched the clips, allowing us to correlate head movements and affect. (frontiersin.org)
  • The signals from the eye-movement monitoring sensor must, of course, be calibrated and suitably processed to correlate the subject's eye movements with a particular portion of the scene viewed. (justia.com)
  • Understanding the neural mechanisms that form the basis for this common activity requires development of ways in which to separate individual movement components in order to correlate neural activity with some but not other features, and also a recognition that naturally occurring movements are made within a broader context. (rochester.edu)
  • The calculations the brain has to perform are more complicated in this case: the three-dimensional, expanding forward movement is superimposed onto the two-dimensional lateral movements that are caused by eye movements. (healthcanal.com)
  • Strokes and spinal cord injuries can quickly disconnect parts of the brain that initiate movement with the nerves and muscles that execute it, and neurodegenerative disorders such as Parkinson's disease and amyotrophic lateral sclerosis (ALS) draw the process out to the same effect. (innovationtoronto.com)
  • No. 3,712,716 mentions that a lateral head movement of 0.2 mm while viewing an object two meters away changes the position being looked at, so far as the measuring apparatus is concerned, by 35 mm. (justia.com)
  • During elbow flexion, motor units in the lateral portion of the long head of the biceps are preferentially activated, whereas during forearm rotation, motor units in the medial portion are preferentially activated (Ter Harr Romeny, et al. (exrx.net)
  • The findings suggest that image-processing circuits in the primary visual cortex not only are more active when animals move, but that they receive signals from a movement-controlling region of the brain that is independent from the region that processes what the animal is looking at. (genengnews.com)
  • We used high-speed video recordings of stride to understand how head acceleration signals relate to locomotion and developed techniques to identify episodes of sniffing, walking, trotting, and galloping from the recorded variables. (hindawi.com)
  • From this they have been able to discover that V3A and V6, unlike other visual areas in the brain, have a pronounced ability to compare eye movements with the visual signals on the retina. (healthcanal.com)
  • This invention is directed to a technique for monitoring the eye movements of a subject viewing a certain scene in order to determine at what portion of the scene the subject is looking and, more particularly, the invention enables the signals obtained by the eye-movement monitoring equipment to be corrected for movement of the subject's head. (justia.com)
  • In systems in which the eye movements and scene are shown simultaneously on a video monitor, the positioning circuitry responsive to the eye movement signals superimposes a cursor over the scene. (justia.com)
  • Excitatory input is needed for initiating such movements, and LPGi may be critical for relaying signals from the motor cortex to whisker motor neurons. (medindia.net)
  • This signal is subsequently decomposed into eye and head desired displacement signals which are used as input to separate controllers. (rochester.edu)
  • More specifically, spatial asymmetry was found to be strongly correlated with rotational head velocity, ensuring a "look-ahead" distance of almost exactly one whisk. (jneurosci.org)
  • The goal is to define a basis for measuring linear and rotational response of the head in actual racecar impacts. (sae.org)
  • The remaining 50 degrees of the gaze shift were accomplished by the saccadic eye movement. (rochester.edu)
  • We find a consistent relationship between the duration, peak velocity and amplitude of saccadic head movements, which in its main characteristics resembles the so-called "saccadic main sequence" in humans. (uni-bielefeld.de)
  • This study analyzes how human participants combine saccadic and pursuit gaze movements when they track an oscillating target moving along a randomly oriented straight line with the head free to move. (arvojournals.org)
  • Quantitative analysis of synchrony between respiration and head acceleration rhythms revealed that respiration and locomotion movements were coordinated but with a weaker coupling than expected from previous work in other mammals. (hindawi.com)
  • We quantified the rhythmical dynamics of locomotion by recording vertical head acceleration using a miniature accelerometer attached to the head of the rats. (biomedcentral.com)
  • A consequence of human locomotion (walking, running) is the occurrence of related eye (EM) and head (HM) movements, which could potentially distort locomotion-produced flow field information. (arvojournals.org)
  • Participants' head was either aligned with the trunk or tilted 30° towards the left or right shoulder. (archives-ouvertes.fr)
  • In experiment 1, participants observed first the figure with the head straight and then reproduced it with the head either aligned or tilted sideways. (archives-ouvertes.fr)
  • In Experiment 2, participants observed the figure with the head in the position in which the figure was later reproduced. (archives-ouvertes.fr)
  • This event brings together over 7,000 participants from various education fields to stimulate innovative ideas, and we are excited host panel participants from various industries to discuss the Maker Movement at this critical stage of intellectual development. (nhsa.org)
  • Active head movement perception has been shown to be dependent on head movement velocity where participants who move their head fastest require the head to move earlier than comparison stimuli for perceived simultaneity more so than those who move their head slower. (uwaterloo.ca)
  • Second, given the large sample size of participants needed to get reliable valence and arousal ratings for our video, we were able to explore the possible links between the head movements of the observer and the emotions he or she feels while viewing immersive VR. (frontiersin.org)
  • In contrast, bilateral asynchrony and velocity asymmetry were only weakly dependent on head velocity. (jneurosci.org)
  • Such between-subject results cannot address whether active head movement perception changes with velocity. (uwaterloo.ca)
  • The present study used a within-subjects design to measure the point of subjective simultaneity (PSS) between active head movement speeds and a comparison sound stimulus to characterize the relationship between the velocity and perception of head movement onset. (uwaterloo.ca)
  • median peak velocity 72 ms-257 ms). We conclude that head movement perception is slow, but that this delay is minimized with increased speed. (uwaterloo.ca)
  • Our sinusoidal paradigm allowed us to show that saccade amplitude was better correlated with internal estimates of position and velocity error at saccade onset than with those parameters 100 ms before saccade onset as head-restrained studies have shown. (arvojournals.org)
  • Therefore, our results indicate that the triggering mechanism of head-unrestrained catch-up saccades combines position and velocity error at saccade onset to program and correct saccade amplitude rather than using sensory information 100 ms before saccade onset. (arvojournals.org)
  • Pursuit gain (ratio between eye velocity and target velocity) is normally smaller than one during head-restrained pursuit (Meyer, Lasker, & Robinson, 1985 ), thus the eye would increasingly lag behind the target if no correcting movements occurred. (arvojournals.org)
  • A dynamic signal of horizontal head velocity inhibits the gain of the exponential function describing the horizontal eye burst generator. (rochester.edu)
  • The movement-related findings were unexpected since vision tends to be thought of as a feed-forward computation system in which visual information enters through the retina and travels on neural circuits that operate on a one-way path, processing the information piece by piece. (genengnews.com)
  • The team also noticed that the neural patterns in the visual cortex that were firing during movement differed in the dark and light, meaning they weren't directly connected. (genengnews.com)
  • My approach to understanding these critical brain functions focuses on issues of sensori-motor integration and the neural computations necessary to plan and execute coordinated movements. (rochester.edu)
  • The medial septal area provides widespread cholinergic input to various brain regions, but selective damage to medial septal cholinergic neurons generally has little effect on landmark-based navigation, or the underlying neural representations of location and directional heading in visual environments. (ovid.com)
  • These IC's are compared with reference IC's and similarity values obtained were used for classification of the head movement by the neural network classifier. (deepdyve.com)
  • In this paper a simulation of the neural network in C. elegans that responds to chemical stimulus is presented and a consequent realistic head movement demonstrated. (shu.ac.uk)
  • Supplementary Figure 1 analyzes the coupling of respiration to head movements while the rats perform sniffing behavior while walking. (hindawi.com)
  • In the rat, fast respiration is coupled to head movements during sniffing behavior, but whether respiration is entrained by stride dynamics is not known. (hindawi.com)
  • In this paper, we will focus on phenomena of embodiment in psychotherapy dyads: a previous study on nonverbal behavior in psychotherapy ( Ramseyer and Tschacher, 2011 ) has identified nonverbal synchrony - the coordination of patient's and therapist's body-movement - as an indicator of embodied processes in the therapy dyad. (frontiersin.org)
  • These are dicussed in the article "Methods and Designs, Survey of Eye Movement Recording Methods" by Lawrence R. Young and David Sheena in Behavior Research Methods & Instrumentation 1975Vol. (justia.com)
  • OBJECTIVE: Positioning and maintaining the subject's head at the calibration point (CP) of the sound field (SF) during SF assessment remains a challenge. (biomedsearch.com)
  • In the second category of eye-movement monitoring equipment, both the light source and sensor are mounted on the subject's head. (justia.com)
  • Experimental results demonstrate that with our compensation method the gaze tracking system is more robust to natural head movements compared to other systems without our method and commercial systems. (mdpi.com)
  • Clinically, the location of sICAD initiation is 10-30 mm distal to the origin of the cervical ICA, which corresponds with the peak stress locations observed in the model, thus supporting trivial trauma from natural head movements as a possible initiating factor in sICAD. (uzh.ch)
  • It shows a photorealistic video of a scene that updates based on head-orientation but is not otherwise interactive ( Slater and Sanchez-Vives, 2016 ). (frontiersin.org)
  • 2016. "Compensation Method of Natural Head Movement for Gaze Tracking System Using an Ultrasonic Sensor for Distance Measurement. (mdpi.com)
  • Should the focus of the movement be on ending abortion or something broader? (thegospelcoalition.org)
  • But Gerson quickly clarified that the movement to care about a broader set of issues, beyond abortion and family, is not an innovation but an evangelical tradition. (christianpost.com)
  • After applying Placemaking for many powerful movements, 2014 was the year that Place and Placemaking was established as a cause onto itself, coalescing many movements looking for broader change. (pps.org)
  • The present study used high-speed videography to reveal dramatic bilateral asymmetries and asynchronies in free-air whisking during head rotations. (jneurosci.org)
  • It was also found that the use of a nose clip could reduce the impact of the head left/ right rotations on nose maximum contact pressure changes. (cdc.gov)
  • Between saccades, the angular velocities of the head are approximately half those of the thorax and lie mostly in the range 0-100 degrees s-1 for any rotation (yaw, pitch and roll). (biologists.org)
  • Finite element method (FEM) simulations of 16 headform and respirator combinations (5 headforms and 6 respirators) were used to examine maximum contact pressure changes for five cases: static head, flexion, extension, left rotation, and right rotation. (cdc.gov)
  • At the extreme range of the movements, the geometrical compliance of the carotid sinus is limited and significant stress concentrations appear just distal to the sinus with peak stresses at the internal wall on the posterior side of the vessel following maximum head rotation and on the anteromedial portion of the vessel wall following rotation and hyperextension. (uzh.ch)
  • Head orientation is stabilized for most of the time by counter rotation. (uni-bielefeld.de)
  • These findings highlight the importance of understanding the role of eye movements in environmental coordination. (psu.edu)
  • We are currently studying the role of the brainstem in eye-head coordination, cerebellar contributions to eye-head movements and motor learning processes, and the interactions between cerebellum and brainstem regions involved in control of visual orienting. (rochester.edu)
  • In addition, we are expanding our interests in eye-head coordination in a study involving human subjects investigating the ability to adapt motor output based on changed visual inputs, and the effects of aging on eye-head coordination. (rochester.edu)
  • The coordination of patient's and therapist's bodily movement - nonverbal synchrony - has been empirically shown to be associated with psychotherapy outcome. (frontiersin.org)
  • The differentiation of head- and body-synchrony showed that these two facets of motor coordination were differentially associated with outcome. (frontiersin.org)
  • We recorded intranasal pressure, head acceleration, instantaneous speed, and ultrasonic vocalizations from male and female adult rats while freely behaving in a social environment. (hindawi.com)
  • The 2nd part of this project involved the evaluation of head acceleration response during the hyge sled tests. (sae.org)
  • Phase synchrony was investigated by computing the difference of the estimated phases for pairs of data windows in which both LFP and head acceleration show strong power in the theta band and moreover had similar frequencies. (biomedcentral.com)
  • When this model is forced by an input proportional to the head acceleration signal, it shows phase-locking and amplitude-modulation quantitatively in agreement with the experimental results. (biomedcentral.com)
  • The yaw turns of the thorax (thorax saccades) are accompanied by faster saccades of the head, starting later and finishing earlier than the thorax saccades. (biologists.org)
  • Blowfly flight can be divided into two sets of episodes: 'during saccades', when high angular velocities of up to a few thousand degrees per second are reached by both the thorax and head, and 'between saccades', when the orientation of the thorax and, in particular, the head is well stabilized. (biologists.org)
  • These short and fast yaw turns ("saccades") are usually accompanied by even faster head yaw turns that change gaze direction. (uni-bielefeld.de)
  • The detailed analysis of the fine structure of the bees' head turning movements shows that the time course of single head saccades is very stereotypical. (uni-bielefeld.de)
  • The fact that bumblebee head saccades are highly stereotyped as in humans, may hint at a common principle, where fast and precise motor control is used to reliably reduce the time during which the retinal images moves. (uni-bielefeld.de)
  • Two types of eye movements ensure clear vision while tracking an object: saccades and smooth pursuit. (arvojournals.org)
  • Involuntary eye movements, a condition often referred to as a nystagmus, make the eyes appear to shake or move back and forth, up or down. (livestrong.com)
  • The problem you describe in your son sounds like a tic - a sudden, rapid and involuntary movement of a group of muscles. (netdoctor.co.uk)
  • We examined the characteristics of spontaneous movements at 9-20 weeks postterm age in very low birth-weight infants who later developed autism spectrum disorder (ASD). (springer.com)
  • The characteristics of head nodding are slightly different from those of complex motor stereotypies of the limbs. (medscape.com)
  • We analyzed video recordings of spontaneous movements of 39 children who had no clinical issues [typically developing (TD) group], 21 children who showed developmental delay, and 14 children who were diagnosed with ASD (ASD group) at 6 years of age. (springer.com)
  • They took both classes to get their comprehensive knowledge and experiences and then having the actual study abroad experience, getting the full cultural context of the whole film movement and being New Wavists, it's this holistic approach. (lsu.edu)
  • Self-reported Musculoskeletal Complaints, Neuromuscular Examination Findings and Movement Impairments in Air Force Pilots. (umu.se)
  • Furthermore, the typical head heights of infants will introduce additional variability, unless the position of the CP is chosen carefully. (biomedsearch.com)
  • Poorer performance in maintaining midline position of the head at this period may distinguish infants who later develop ASD from those who show TD. (springer.com)
  • Einspieler C, Sigafoos J, Bartl-Pokorny KD, Landa R, Marschik PB, Bölted S (2014) Highlighting the first 5 months of life: general movements in infants later diagnosed with autism spectrum disorder or Rett syndrome. (springer.com)
  • Flanagan JE, Landa R, Bhat A, Bauman M (2012) Head lag in infants at risk for autism: a preliminary study. (springer.com)
  • During sniffing, respiration, whisking, and head position all oscillate with rates in the 5-11 Hz. (hindawi.com)
  • Influence of head orientation on visually and memory-guided arm movements. (archives-ouvertes.fr)
  • The position and orientation of the thorax and head of flying blowflies (Calliphora vicina) were measured using small sensor coils mounted on the thorax and head. (biologists.org)
  • When a viewer watches an immersive VR clip, he sees a 360° view from where the video was originally recorded, and while changes in head orientation are rendered accurately, typically these videos do not allow for head translation. (frontiersin.org)
  • It is currently unknown if a head-first or a tail-first orientation are equally common during the descent through the small bowel. (ovid.com)
  • Eye tics typically don't require treatment, but if your child has worsening tics or displays other symptoms, your doctor may recommend evaluation for Tourette's or other possible causes of the abnormal movements. (livestrong.com)
  • Typically my Jazz Movement Studies are meant to graphically transcribe music (unconventional or otherwise) that is less accessible to a general public. (mcachicago.org)
  • Your brand of vertigo strongly suggests benign positional vertigo, dizziness that comes on with head motion. (southcoasttoday.com)
  • As you said it comes with moving of head at times,benign positional vertigo is more likely. (healthcaremagic.com)
  • To keep an object of interest on the fovea during everyday life activities, humans track moving targets with combined eye-head movements (called gaze movements, gaze = eye-in-space = eye-in-head + head-in-space). (arvojournals.org)
  • Then we must compute the difference between our current line of sight and the position of the target, incorporate information about the capabilities of the body segments which will contribute to moving the line of sight (e.g. the mobility of the eyes and head given their current positions), and coordinate more than 40 muscles and muscle groups to smoothly look at the target. (rochester.edu)
  • The triarticulate biceps brachii muscles, particularly the short head [2 ] enters passive insufficiency through the completion of elbow extension when the shoulders are more extended or through the completion of shoulder extension when the elbows are more extended. (exrx.net)
  • The movement of your muscles is necessary for you to come to the right conclusion. (healthguidance.org)
  • We report that when rats run, their heads oscillate at 6-12 Hz in a speed-dependent manner. (biomedcentral.com)
  • Because head movement during fMRI degrades data quality, data associated with severe movement is frequently discarded as a source of random error. (bio-medicine.org)
  • This finding indicates that discarding data with severe movement artifact may bias MS samples such that only subjects with less-severe cognitive impairment are included in the analyses. (bio-medicine.org)
  • The model is designed for the analysis of severe accidents in LWRs, wherein melted core plate material may slump onto the top of a porous bed of relocated core material supported by the lower head. (unt.edu)
  • The integrated model has been implemented into the SCDAP/RELAP5 code for the analysis of the integrity of LWR lower heads during severe accidents. (unt.edu)
  • Every 8 seconds in North America, someone gets a serious blow to the head, severe enough to cause concussion. (waterdownoptometric.ca)
  • Kinematic analysis suggested that these asymmetric movements did not serve to maintain any fixed temporal relationship between right and left arrays, but rather to redirect the whiskers to a different region of space. (jneurosci.org)
  • Via functional brain imaging synchronized with motion cameras, we also investigate brain activity during individual finger movements. (umu.se)
  • We estimated the 'instantaneous' frequency, phase and amplitude of the LFP and vertical head oscillations by finding the sine wave that best described the data in short sliding windows. (biomedcentral.com)
  • Further evidence for a modulation of hippocampal theta by the movement dynamics was provided by the observation that theta amplitude was highest when hippocampal theta and head oscillations were in phase. (biomedcentral.com)
  • F reedom of movement will end in March 2019 when the UK leaves the European Union, a Cabinet minister has said in contrast to senior Tory colleagues. (telegraph.co.uk)
  • He told BBC Radio 4's Today programme: 'Free movement of labour ends when we leave the European Union in the spring of 2019 - we're very clear about that. (telegraph.co.uk)
  • P ressed on whether ending free movement in March 2019 was a Brexit red line, he said: 'It's a simple matter of fact that the four key principles of the European Union include free movement - we won't be a member of the European Union when we leave. (telegraph.co.uk)
  • Animals actively sample the sensory world by generating complex patterns of movement that evolve in three dimensions. (genengnews.com)
  • In fact, the researchers describe two sets of movement-related patterns in the visual cortex that are based on head motion and whether an animal is in the light or the dark. (genengnews.com)
  • This finding was based on dynamic movement patterns of the whole body. (frontiersin.org)
  • The demography, spatial distribution, and movement patterns of leopard sharks (Triakis semifasciata) aggregating near the head of a submarine canyon in La Jolla, California, USA, were investigated to resolve the causal explanations for this and similar shark aggregations. (usgs.gov)
  • We report use of high-speed spectral domain optical coherence tomography to noninvasively image pulsatile axial movement of the optic nerve head (ONH) in normal human subjects. (osapublishing.org)
  • Vision, audition and somatosensation provide information about objects in the world, information about self movement is provided through the vestibular and proprioceptive systems. (rochester.edu)
  • We suggest that the spatial asymmetries are analogous to the saccade that occurs during the initial portion of a combined head-eye gaze shift, and we begin to develop the rat vibrissal system as a new model for studying vestibular and proprioceptive contributions to the acquisition of sensory data. (jneurosci.org)
  • Results of Experiment 1 and 2 showed deviations of the motor reproduction in the direction opposite to the head in both the memory and visually-guided conditions. (archives-ouvertes.fr)
  • Head movements and eye functions of birds. (springer.com)
  • Head, eye, and gaze position are plotted as functions of time during a 60 degree gaze shift composed of coordinated movements of the eyes and head. (rochester.edu)
  • However, the vast complexity of such systems has made it very difficult to fully understand even basic functions such as movement. (shu.ac.uk)
  • In the March issue of The Journal of Neuroscience , Contreras-Vidal and his team from the bioengineering and kinesiology departments at the University of Maryland , College Park, show that the noisy brain waves recorded using noninvasive EEG can be mathematically decoded into meaningful information about complex human movements. (innovationtoronto.com)
  • We must be able to gather accurate sensory information about our surroundings, distinguish our movements from the movements of objects in the world, and coordinate our own movements in order to orient, and navigate smoothly through a complex setting. (rochester.edu)
  • I am especially fascinated by V3A because it reacts so strongly and selectively to movements in our surroundings. (healthcanal.com)
  • Indeed, patients who have lost this ability to integrate movements in their surroundings with their eye movements can no longer recognize what it is that ultimately is moving: the surroundings or themselves. (healthcanal.com)
  • The present paper is a new analysis of an existing dataset ( Ramseyer and Tschacher, 2011 ), which extends previous findings by differentiating movements pertaining to head and upper-body regions. (frontiersin.org)
  • Checkups with a pediatrician may not detect subtle eye conditions, so parents should watch for signs such as abnormal eye movements or head positions. (livestrong.com)
  • An abnormal eye or head movements may also stem from a "tic," a condition common in children. (livestrong.com)
  • If your child displays abnormal eye or head movements, contact your pediatrician. (livestrong.com)
  • Other eye conditions such as congenital cataracts may also require surgery to improve vision and prevent abnormal movements. (livestrong.com)
  • Your child may turn her head or tilt her head back so that she can see something directly in front of her body. (livestrong.com)
  • A doll includes a plush doll body having a movable head. (freepatentsonline.com)
  • A body housing within the doll body supports a control and sound circuit which is operatively coupled to a bidirectional motor drive system operative to move the head from side-to-side. (freepatentsonline.com)
  • Head- and body-synchrony was quantified during the initial 15 min of video-recorded therapy sessions. (frontiersin.org)
  • Head-synchrony predicted global outcome of therapy, while body-synchrony did not, and body-synchrony predicted session outcome, while head-synchrony did not. (frontiersin.org)
  • The separation of head- and body-synchrony suggested that distinct mechanisms may operate in these two regions: Head-synchrony embodied phenomena with a long temporal extension (overall therapy success), while body-synchrony embodied phenomena of a more immediate nature (session-level success). (frontiersin.org)
  • The aim of all work on the body and movement is to be able to use parts of it in isolation - a mere expressionless shrug is sometimes worth a page of dialogue. (megahowto.com)
  • The appearance of tension in the shoulders is the most obvious sign of a nervous actor and is an impediment to action with the top half of the body, head, arms and hands. (megahowto.com)
  • In an immersion experiment, uneven distribution of weight of the capsule body was demonstrated with the head part (camera tip) being lighter than the tail part. (ovid.com)
  • Here, we use high-speed video to analyse head- and body-movements of the bumblebee Bombus terrestris while approaching and departing from a food source located between three landmarks in an indoor flight-arena. (uni-bielefeld.de)
  • Then the child on the next page copies the movement with a part of their body and shouts "I Can Do It. (yourparentinginfo.com)
  • This book also teaches about basic body parts from head to toe. (yourparentinginfo.com)
  • Read the story aloud, stopping after each animal says a body part and a movement. (yourparentinginfo.com)
  • Take all the body movements mentioned in the story and create a fun dance to do together. (yourparentinginfo.com)
  • I am (name of the child) and I can (movement) with my (body part). (yourparentinginfo.com)
  • In some children, a natural progression is seen, beginning with thumb or hand sucking and then progressing to body rocking and head banging and, later still, to nail biting and foot or finger tapping. (medscape.com)
  • I saw everything from speed reading to silent communications between a group via text messages, verbalized punctuation, whispering, silent body-movement-interpretations of Cage's concepts, yelling, and general absurdity. (mcachicago.org)
  • We use a motion capture system to analyze hand, arm and upper body function as well as gait in a movement lab. (umu.se)
  • A child may position his head to compensate for eye misalignment that may occur with conditions such as a "lazy eye. (livestrong.com)
  • and a position switch operatively coupled to said shaft coupler providing an off signal to said control and sound circuit when said shaft coupler is pivoted left or right beyond a predetermined position, said head being pivoted to left or right in response to said sound from left or right respectively and said means for moving said mouth operating independent of left or right pivoting head movement. (freepatentsonline.com)
  • Keeping the head in that position, lie down and let the head bend downward about 20 degrees over the edge of the bed. (southcoasttoday.com)
  • Head position in each video frame was classified by visual inspection. (springer.com)
  • The percentage of midline head position (PMHP) and number of changes in head position were calculated. (springer.com)
  • A technique is disclosed to provide eye movement measurement in which the eye position signal is corrected for head movement. (justia.com)
  • Then when he was laying there all of a sudden his head started shaking up and down. (justlabradors.com)
  • Compensation of the effects of eye and head movements during walking and running [Abstract]. (arvojournals.org)
  • The head contributed ~10 degrees to the overall change in gaze direction during this movement. (rochester.edu)
  • A mouth moving mechanism is independently provided within the doll head. (freepatentsonline.com)
  • Leung & Kettner, 1997 ) have been studied independently in head-restrained conditions. (arvojournals.org)
  • movements were in directions opposite the saccade (Lunenburg et al. (psu.edu)
  • The results of the study are published in Neuron, in the article, " Encoding of 3D Head Orienting Movements in the Primary Visual Cortex . (genengnews.com)
  • We present the performance of the mantis head camera and pigeon head camera models and provide experimental results and error analysis of the algorithms. (springer.com)
  • Results revealed that the figure was perceived as parallel with the trunk when it was actually tilted in the direction of the head. (archives-ouvertes.fr)
  • The results of the model indicate that melted core plate material my permeate in about 120 s to the bottom of a 1 m deep hot porous debris bed supported by the lower head. (unt.edu)
  • These results suggest that acetylcholine contributes to path integration, in part, by facilitating the use of idiothetic cues to maintain a consistent representation of directional heading. (ovid.com)
  • Concussion in children apparently results in the same type of eye movement abnormalities and the severity of the injury as it does in adults. (waterdownoptometric.ca)
  • Parts 2 and 3 of the study, investigated the SPL at two typical head heights of the infant population. (biomedsearch.com)
  • Einspieler C, Prechtl HFR, Bos AF, Ferrari F, Cioni G (2004) Prechtl's method on the qualitative assessment of general movements in preterm, term and young infant. (springer.com)
  • The effect of head movement and head positioning on sound field audiometry. (biomedsearch.com)
  • At the same time whisking movements emerge, motor neurons receive a new set of inputs from a region of the brainstem called the LPGi. (medindia.net)
  • The purpose of this study is to evaluate and measure the movement of the endotracheal tube depending on the type and the amount of movement of the head of the patient intubated using a flexible fiberoptic. (clinicaltrials.gov)
  • The purpose of this study was to investigate the sound pressure level (SPL) at head positions likely to be encountered in routine audiological practice. (biomedsearch.com)
  • Kessler Foundation researchers study impact of head movement on. (bio-medicine.org)
  • Adde L, Helbostad JL, Jensenius AR, Taraldsen G, Grunewaldt KH, Støen R (2010) Early prediction of cerebral palsy by computer-based video analysis of general movements: a feasibility study. (springer.com)
  • In contrast, the present study investigates how these two types of eye movements interact in a more natural setting, with head movement. (arvojournals.org)
  • If your child has an eyelid condition known as ptosis, in which his upper eyelid droops down over his eyes, he may tilt his head back and look "down" to see beyond his eyelids. (livestrong.com)
  • In Experiment 1, the perceptual visual bias induced by head tilt was evaluated. (archives-ouvertes.fr)
  • Different movements correspond to different actions in a demonstration app that shows the online retailer's daily deals: navigate through categories and products by tilting your head all the way in various directions, or tilt partway down to buy, save or share. (techcrunch.com)
  • With the help of functional magnetic resonance imaging (fMRI) scientists from the Werner Reichardt Centre for Integrative Neuroscience and the Max Planck Institute for Biological Cybernetics in Tübingen have identified two areas of the brain that compare the movements of the eye with the visual movements cast onto the retina so as to correctly perceive objects in motion. (healthcanal.com)
  • LANDOVER, Md. - The evangelical movement is at a "head-snapping" generational change with younger evangelicals "revolting" against the tone of the Christian Right, says a prominent religious scholar. (christianpost.com)