Sensory thresholds. Medical search

The minimum amount of stimulus energy necessary to elicit a sensory response.

The sensation of cold, heat, coolness, and warmth as detected by THERMORECEPTORS.

The process in which specialized SENSORY RECEPTOR CELLS transduce peripheral stimuli (physical or chemical) into NERVE IMPULSES which are then transmitted to the various sensory centers in the CENTRAL NERVOUS SYSTEM.

Amount of stimulation required before the sensation of pain is experienced.

Sensation of making physical contact with objects, animate or inanimate. Tactile stimuli are detected by MECHANORECEPTORS in the skin and mucous membranes.

A continuing periodic change in displacement with respect to a fixed reference. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Failure of voluntary control of the anal sphincters, with involuntary passage of feces and flatus.

Diseases of the peripheral nerves external to the brain and spinal cord, which includes diseases of the nerve roots, ganglia, plexi, autonomic nerves, sensory nerves, and motor nerves.

A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Measurement of the pressure or tension of liquids or gases with a manometer.

Scales, questionnaires, tests, and other methods used to assess pain severity and duration in patients or experimental animals to aid in diagnosis, therapy, and physiological studies.

An unpleasant sensation induced by noxious stimuli which are detected by NERVE ENDINGS of NOCICEPTIVE NEURONS.

Presence of warmth or heat or a temperature notably higher than an accustomed norm.

The smallest difference which can be discriminated between two stimuli or one which is barely above the threshold.

The audibility limit of discriminating sound intensity and pitch.

The propagation of the NERVE IMPULSE along the nerve away from the site of an excitation stimulus.

A major nerve of the upper extremity. In humans, the fibers of the median nerve originate in the lower cervical and upper thoracic spinal cord (usually C6 to T1), travel via the brachial plexus, and supply sensory and motor innervation to parts of the forearm and hand.

Peripheral, autonomic, and cranial nerve disorders that are associated with DIABETES MELLITUS. These conditions usually result from diabetic microvascular injury involving small blood vessels that supply nerves (VASA NERVORUM). Relatively common conditions which may be associated with diabetic neuropathy include third nerve palsy (see OCULOMOTOR NERVE DISEASES); MONONEUROPATHY; mononeuropathy multiplex; diabetic amyotrophy; a painful POLYNEUROPATHY; autonomic neuropathy; and thoracoabdominal neuropathy. (From Adams et al., Principles of Neurology, 6th ed, p1325)

A branch of the tibial nerve which supplies sensory innervation to parts of the lower leg and foot.

A major nerve of the upper extremity. In humans, the fibers of the ulnar nerve originate in the lower cervical and upper thoracic spinal cord (usually C7 to T1), travel via the medial cord of the brachial plexus, and supply sensory and motor innervation to parts of the hand and forearm.

The medial terminal branch of the sciatic nerve. The tibial nerve fibers originate in lumbar and sacral spinal segments (L4 to S2). They supply motor and sensory innervation to parts of the calf and foot.

A genus of the family Chinchillidae which consists of three species: C. brevicaudata, C. lanigera, and C. villidera. They are used extensively in biomedical research.

Hearing loss due to exposure to explosive loud noise or chronic exposure to sound level greater than 85 dB. The hearing loss is often in the frequency range 4000-6000 hertz.

Any sound which is unwanted or interferes with HEARING other sounds.

Noise present in occupational, industrial, and factory situations.

Personal devices for protection of the ears from loud or high intensity noise, water, or cold. These include earmuffs and earplugs.

Stainless steel. A steel containing Ni, Cr, or both. It does not tarnish on exposure and is used in corrosive environments. (Grant & Hack's Chemical Dictionary, 5th ed)

A syndrome of abnormally low BLOOD GLUCOSE level. Clinical hypoglycemia has diverse etiologies. Severe hypoglycemia eventually lead to glucose deprivation of the CENTRAL NERVOUS SYSTEM resulting in HUNGER; SWEATING; PARESTHESIA; impaired mental function; SEIZURES; COMA; and even DEATH.

A subtype of DIABETES MELLITUS that is characterized by INSULIN deficiency. It is manifested by the sudden onset of severe HYPERGLYCEMIA, rapid progression to DIABETIC KETOACIDOSIS, and DEATH unless treated with insulin. The disease may occur at any age, but is most common in childhood or adolescence.

Diseases of the parasympathetic or sympathetic divisions of the AUTONOMIC NERVOUS SYSTEM; which has components located in the CENTRAL NERVOUS SYSTEM and PERIPHERAL NERVOUS SYSTEM. Autonomic dysfunction may be associated with HYPOTHALAMIC DISEASES; BRAIN STEM disorders; SPINAL CORD DISEASES; and PERIPHERAL NERVOUS SYSTEM DISEASES. Manifestations include impairments of vegetative functions including the maintenance of BLOOD PRESSURE; HEART RATE; pupil function; SWEATING; REPRODUCTIVE AND URINARY PHYSIOLOGY; and DIGESTION.

The act of "taking account" of an object or state of affairs. It does not imply assessment of, nor attention to the qualities or nature of the object.

Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)

The ENTERIC NERVOUS SYSTEM; PARASYMPATHETIC NERVOUS SYSTEM; and SYMPATHETIC NERVOUS SYSTEM taken together. Generally speaking, the autonomic nervous system regulates the internal environment during both peaceful activity and physical or emotional stress. Autonomic activity is controlled and integrated by the CENTRAL NERVOUS SYSTEM, especially the HYPOTHALAMUS and the SOLITARY NUCLEUS, which receive information relayed from VISCERAL AFFERENTS.

Computer programs based on knowledge developed from consultation with experts on a problem, and the processing and/or formalizing of this knowledge using these programs in such a manner that the problems may be solved.

A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.

Exclusive legal rights or privileges applied to inventions, plants, etc.

Transmission of the readings of instruments to a remote location by means of wires, radio waves, or other means. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

The doctrines and policies of the Nazis or the National Social German Workers party, which ruled Germany under Adolf Hitler from 1933-1945. These doctrines and policies included racist nationalism, expansionism, and state control of the economy. (from Columbia Encyclopedia, 6th ed. and American Heritage College Dictionary, 3d ed.)

Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.

Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.

An increased sensation of pain or discomfort produced by mimimally noxious stimuli due to damage to soft tissue containing NOCICEPTORS or injury to a peripheral nerve.

The period during a surgical operation.

The relationship between the dose of an administered drug and the response of the organism to the drug.

Pain during the period after surgery.

Transient and permanent deficits in motion perception after lesions of cortical areas MT and MST in the macaque monkey. (1/3575)

We examined the nature and the selectivity of the motion deficits produced by lesions of extrastriate areas MT and MST. Lesions were made by injecting ibotenic acid into the representation of the left visual field in two macaque monkeys. The monkeys discriminated two stimuli that differed either in stimulus direction or orientation. Direction and orientation discrimination were assessed by measuring thresholds with gratings and random-dots placed in the intact or lesioned visual fields. At the start of behavioral testing, we found pronounced, motion-specific deficits in thresholds for all types of moving stimuli, including pronounced elevations in contrast thresholds and in signal-to-noise thresholds measured with moving gratings, as well as deficits in direction range thresholds and motion coherence measured with random-dot stimuli. In addition, the accuracy of direction discrimination was reduced at smaller spatial displacements (i.e. step sizes), suggesting an increase in spatial scale of the residual directional mechanism. Subsequent improvements in thresholds were seen with all motion stimuli, as behavioral training progressed, and these improvements occurred only with extensive behavioral testing in the lesioned visual field. These improvements were particularly pronounced for stimuli not masked by noise. On the other hand, deficits in the ability to extract motion from noisy stimuli and in the accuracy of direction discrimination persisted despite extensive behavioral training. These results demonstrate the importance of areas MT and MST for the perception of motion direction, particularly in the presence of noise. In addition, they provide evidence for the importance of behavioral training for functional recovery after cortical lesions. The data also strongly support the idea of functional specialization of areas MT and MST for motion processing. (+info)

Spinal cord-evoked potentials and muscle responses evoked by transcranial magnetic stimulation in 10 awake human subjects. (2/3575)

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

Electrophysiological evidence for tetrodotoxin-resistant sodium channels in slowly conducting dural sensory fibers. (3/3575)

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

Uninjured C-fiber nociceptors develop spontaneous activity and alpha-adrenergic sensitivity following L6 spinal nerve ligation in monkey. (4/3575)

We investigated whether uninjured cutaneous C-fiber nociceptors in primates develop abnormal responses after partial denervation of the skin. Partial denervation was induced by tightly ligating spinal nerve L6 that innervates the dorsum of the foot. Using an in vitro skin-nerve preparation, we recorded from uninjured single afferent nerve fibers in the superficial peroneal nerve. Recordings were made from 32 C-fiber nociceptors 2-3 wk after ligation and from 29 C-fiber nociceptors in control animals. Phenylephrine, a selective alpha1-adrenergic agonist, and UK14304 (UK), a selective alpha2-adrenergic agonist, were applied to the receptive field for 5 min in increasing concentrations from 0.1 to 100 microM. Nociceptors from in vitro control experiments were not significantly different from nociceptors recorded by us previously in in vivo experiments. In comparison to in vitro control animals, the afferents found in lesioned animals had 1) a significantly higher incidence of spontaneous activity, 2) a significantly higher incidence of response to phenylephrine, and 3) a higher incidence of response to UK. In lesioned animals, the peak response to phenylephrine was significantly greater than to UK, and the mechanical threshold of phenylephrine-sensitive afferents was significantly lower than for phenylephrine-insensitive afferents. Staining with protein gene product 9.5 revealed an approximately 55% reduction in the number of unmyelinated terminals in the epidermis of the lesioned limb compared with the contralateral limb. Thus uninjured cutaneous C-fiber nociceptors that innervate skin partially denervated by ligation of a spinal nerve acquire two abnormal properties: spontaneous activity and alpha-adrenergic sensitivity. These abnormalities in nociceptor function may contribute to neuropathic pain. (+info)

Quantitative structure-activity relationships for nasal pungency thresholds of volatile organic compounds. (5/3575)

A model was developed for describing the triggering of nasal pungency in humans, based on the partition of volatile organic compounds (VOCs) between the air phase and the biophase. Two partition parameters are used in the model: the water-air partition coefficient and the octanol-water partition coefficient. The model was validated using data from the literature, principally on alcohols, acetates and ketones. The model suggests that all test compounds, regardless of their chemical functional groups, bind to a common receptor site within the hydrophobic interior of the bilayer membrane of the trigeminal nerve endings. There is probably only a slight, non-specific interaction between the VOC molecule and the receptor molecule, whereas this type of non-specific interaction for the detection of odor is much stronger. In practical terms, the suggestion that all VOCs share a common irritation receptor site implies that nasal-pungency thresholds of individual VOCs may be additive. Quantitative structure-activity relationships (QSARs) for nasal-pungency thresholds were also developed from the model, which can be used to predict nasal-pungency thresholds of common VOCs. Although the present model does not offer additional precision over that of M.H. Abraham et al., 1996, Fundam. Appl. Toxicol. 31, 71-76, it requires fewer descriptors and offers a physiological basis to the QSAR. Another advantage of the present model is that it also provides a basis for comparison between the olfactory process and nasal pungency. (+info)

Paradoxical heat sensation in healthy subjects: peripherally conducted by A delta or C fibres? (6/3575)

Paradoxical heat sensation upon cooling of the skin has been reported in central as well as in peripheral neurological conditions. In our study, we examined this phenomenon in 35 naive healthy test subjects, of whom 23 experienced paradoxical heat sensation under test conditions. We measured the peripheral conduction velocities of cold sensation, warm sensation and of paradoxical heat sensation by using a quantitative sensory testing model of indirect peripheral conduction velocity measurement. This was based on comparison of measurements at a proximal and a distal site using two measurement methods, one inclusive and the other exclusive of reaction time. We found that the conduction velocity of paradoxical heat sensation (0.70 m/s) was similar to that of warm sensation (0.68 m/s), and that the conduction velocity of cold sensation (7.74-8.01 m/s) was considerably faster. Thus, we conclude that paradoxical heat sensation in healthy subjects is conducted peripherally via slow unmyelinated C fibres and not via the faster A delta fibres. Consequently, we propose that paradoxical heat sensation is encoded via the heat sensing pathway, in accordance with the labelled-line code theory. The mechanisms proposed suggest a malfunctioning cold-sensing pathway disinhibiting the heat-sensing pathway, at peripheral, central or both levels, thus facilitating a paradoxical heat sensation. (+info)

Impairment in preattentive visual processing in patients with Parkinson's disease. (7/3575)

We explored the possibility of whether preattentive visual processing is impaired in Parkinson's disease. With this aim, visual discrimination thresholds for orientation texture stimuli were determined in two separate measurement sessions in 16 patients with idiopathic Parkinson's disease. The results were compared with those of 16 control subjects age-matched and 16 young healthy volunteers. Discrimination thresholds were measured in a four-alternative spatial forced-choice paradigm, in which subjects judged the location of a target embedded in a background of distractors. Four different stimulus configurations were employed: (i) a group of vertical targets among horizontal distractors ('vertical line targets'); (ii) targets with varying levels of orientation difference on a background of spatially filtered vertically oriented noise ('Gaussian filtered noise'); (iii) one 'L' among 43 '+' signs ('texton'), all of which assess preattentive visual processing; and (iv) control condition, of one 'L' among 43 'T' distractors ('non-texton' search target), which reflects attentive visual processing. In two of the preattentive tasks (filtered noise and texton), patients with Parkinson's disease required significantly greater orientation differences and longer stimulus durations, respectively. In contrast, their performance in the vertical line target and non-texton search target was comparable to that of the matched control subjects. These differences were more pronounced in the first compared with the second session. Duration of illness and age within the patient group correlated significantly with test performance. In all conditions tested, the young control subjects performed significantly better than the more elderly control group, further indicating an effect of age on this form of visual processing. The results suggest that, in addition to the well documented impairment in retinal processing, idiopathic Parkinson's disease is associated with a deficit in preattentive cortical visual processing. (+info)

NOS inhibitor antagonism of PGE2-induced mechanical sensitization of cutaneous C-fiber nociceptors in the rat. (8/3575)

Prostaglandins, metabolites of arachidonic acid, released during tissue injury and inflammation sensitize primary afferent nociceptors. While it has been suggested that this effect on nociceptors is mediated mainly via the cAMP second messenger system, recent evidence suggests that nitric oxide (NO) is also involved in peripheral pain mechanisms. To test the hypothesis that NO contributes to the sensitization of nociceptors to mechanical stimuli induced by hyperalgesic prostaglandins, we compared von Frey hair mechanical threshold as well as the response evoked by 10-s sustained threshold mechanical stimulation before and after injection of prostaglandin E2 (PGE2) alone, and NOS inhibitor NG-methyl-L-arginine (L-NMA) or its inactive stereoisomer NG-methyl-D-arginine (D-NMA) plus PGE2, adjacent to the receptive field of C-fiber nociceptors. The reduction of mechanical threshold and increase in number of action potentials to sustained mechanical stimulation induced by intradermal application of PGE2 was blocked by L-NMA, but not D-NMA. It is suggested that NO contributes to nociceptor sensitization induced by hyperalgesic prostaglandins. (+info)

... increases the sensory threshold. In other words, sleeping persons perceive fewer stimuli, but can generally still respond ... Sleep is a naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory ... the forebrain then creates a story in an attempt to reconcile and make sense of the nonsensical sensory information presented ... to loud noises and other salient sensory events.[8][6] During slow-wave sleep, humans secrete bursts of growth hormone. All ...

https://en.wikipedia.org/wiki/Sleeping

Sensory processing is often affected, especially the vestibular system. A high pain threshold is often observed.[4] If speech ...

https://en.wikipedia.org/wiki/Isodicentric_15

The human external sensory and perceptual system[1][4] Physical stimulus Sensory organ Sensory receptor Sensory system Cranial ... Thresholds[edit]. Absolute threshold[edit]. Main article: Absolute threshold. Each sense organ (eyes or nose, for instance) ... in sensory organs transduct sensory information from sensory organs towards the central nervous system, to the sensory cortices ... Sensory modalities[edit]. Main article: Sensory modalities. Sensory modality refers to the way that information is encoded, ...

https://en.wikipedia.org/wiki/Sense?rdfrom=http://www.chinabuddhismencyclopedia.com/en/index.php?title=Five_organs&redirect=no

Nervous and sensory systems. The nervous system is basically the same as in other vertebrates, with a central brain, a spinal ... Specific events are dependent on threshold values for different tissues.[76] Because most embryonic development is outside the ... Various parts of the cerebrum process sensory input, such as smell in the olfactory lobe and sight in the optic lobe, and it is ... By the age of about ten months they have developed a pointed head with sensory tentacles near the mouth and lost their eyes, ...

https://en.wikipedia.org/wiki/Amphibian

Type II: (medium) Low threshold, rapidly adapting in dynamic settings. *Type III: (large) High threshold, slowly adapting in ... A mechanoreceptor, also called mechanoceptor, is a sensory cell that responds to mechanical pressure or distortion. There are ... Once threshold is reached, the magnitude of the stimulus is encoded in the frequency of impulses generated in the neuron. So ... The impulses travel along the sensory axon to the spinal cord where they form several kinds of synapses: *Some of the branches ...

https://en.wikipedia.org/wiki/Mechanoreceptor

... with their sensory threshold and common sensory descriptors: *4-ethylphenol (,140 μg/L): Band-aids, barnyard, horse stable, ... The sensory threshold for acetaldehyde is 100-125 mg/L. Beyond this level it imparts a sherry type character to the wine which ... Mercaptans have a very low sensory threshold, around 1.5 μg/L,[6] with levels above causing onion, rubber, and skunk type ... The compound responsible is 2-ethoxyhexa-3,5-diene, which has a low sensory threshold concentration of 1 ng/L.[12] In wine it ...

https://en.m.wikipedia.org/wiki/Wine_fault

Smolewska et al. (2006): Aesthetic Sensitivity (AES, having greater awareness of beauty), Low Sensory Threshold (LST, easily ... wrote that sensory processing here refers not to the sense organs themselves, but to what occurs as sensory information is ... Sensory processing sensitivity (SPS) is a temperamental or personality trait involving "an increased sensitivity of the central ... From "... A Review... " (2012): SPS is "unrelated to Sensory Processing Disorder". *From "The Clinical Implications of Jung's ...

https://en.wikipedia.org/wiki/Highly_sensitive_person

2008). Sensory Evolution on the Threshold: Adaptations in Secondarily Aquatic Vertebrates. Berkeley: University of California ... "Sex-specific peptides from exocrine glands stimulate mouse vomeronasal sensory neurons". Nature 437 (7060): 898-901. Bibcode: ... "Use it or lose it: molecular evolution of sensory signaling in primates" (PDF). Pflugers Arch. 453 (2): 125-131. PMID 16897042 ...

https://gl.wikipedia.org/wiki/Órgano_vomeronasal

2008). Sensory Evolution on the Threshold: Adaptations in Secondarily Aquatic Vertebrates. Berkeley: University of California ... Sensory neuronsEdit. Vomeronasal sensory neurons are extremely sensitive and fire action potentials at currents as low as 1 pA ... The vomeronasal organ's sensory neurons act on a different signaling pathway than that of the main olfactory system's sensory ... sensory epithelium. The receptor neurons possess apical microvilli, to which are localized the sensory receptors, G-protein- ...

https://en.m.wikipedia.org/wiki/Vomeronasal_organ

Hearing is an important sensory system for most species of fish. Hearing threshold and the ability to localize sound sources ... Vision is an important sensory system for most species of fish. Fish eyes are similar to those of terrestrial vertebrates like ... A Critique of the paper: "Do fish have nociceptors: Evidence for the evolution of a vertebrate sensory system"" (PDF). Archived ... ISBN 978-0-08-096136-1. Hara TJ and Zielinski B (2006) Fish Physiology: Sensory Systems Neuroscience Academic Press. ISBN 978-0 ...

https://en.wikipedia.org/wiki/Fish_physiology

... effects on thermal sensory and pain thresholds". Neuroscience Letters. 363 (2): 157-162. doi:10.1016/j.neulet.2004.03.069. PMID ...

https://en.m.wikipedia.org/wiki/Bioelectromagnetics

Tomi K, Mashimo T, Tashiro C, Yagi M, Pak M, Nishimura S, Nishimura M, Yoshiya I (1993). "Alterations in pain threshold and ... Tomlin PJ, Jones BC, Edwards R, Robin PE (1973). "Subjective and objective sensory responses to inhalation of nitrous oxide and ...

https://en.wikipedia.org/wiki/Methoxyflurane

... and psychological states influence the threshold for signal detection.[14] Some phantom vibration experiences may be a type of ... the cerebral cortex may misinterpret other sensory input (such as muscle contractions, pressure from clothing, or music) as a ...

https://en.wikipedia.org/wiki/Phantom_vibration_syndrome

... and nerve sensory thresholds in experimental diabetic neuropathic rats.[25][26] ...

https://en.wikipedia.org/wiki/Taurine

The recognition odor threshold is usually a factor of 2 to 5 times higher than the detection threshold.[19] ... As a result, odor sensory methods, instead of instrumental methods, are normally used to measure such odor. Odor sensory ... To measure odor sensation, an odor is diluted to a detection or recognition threshold. The detection threshold is the ... It is standardized in CEN EN 13725:2003.[20] The method is based on dilution of an odor sample to the odor threshold. The ...

https://en.wikipedia.org/wiki/Odour

An electrical stimulus below threshold strength fails to elicit a propagated spike potential. If it is of threshold strength or ... Adrian isolated and stimulated one sensory fibre. The impulses externally on the fibre were uniform: "as simple as the dots in ... As long as the stimulus reaches the threshold, the full response would be given. Larger stimulus does not result in a larger ... If a nerve trunk is stimulated, then as the exciting stimulus is progressively increased above a threshold, a larger number of ...

https://en.wikipedia.org/wiki/All-or-none_law

Sensory and psychodynamics of human hearing[edit]. Cocktail party effect[edit]. Understanding speech[edit]. Non-linearity[edit] ... Main article: Absolute threshold of hearing. Audiometric testing[edit]. *objectives: integrity, structure, function, freedom ... This stimulates the sensory cells of the organ of Corti, atop the basilar membrane, to send nerve impulses to the central ... The most commonly used assessment of hearing is the determination of the threshold of audibility, i.e. the level of sound ...

https://en.wikipedia.org/wiki/Audiometry

... a factor which led to the concept of a defect in sensory peripheral neural mechanisms.[10] Changes in the oral environment, ... so it has been suggested that it is a disorder of reduced pain threshold and increased sensitivity. Often people with BMS have ...

https://en.wikipedia.org/wiki/Burning_mouth_syndrome

... and research on sensory psychology and sensory physiology laid the groundwork for accepting experimental psychology as a field ... The two-point threshold, the smallest distance between two points where a person determines that it is two points and not one, ... Two-point Threshold Technique: helped map sensitivity and touch acuity on the body using compass technique. Points of a compass ... In a book titled De Tactu, which translates to "Concerning touch" in English, he decided that there was a threshold of ...

https://en.wikipedia.org/wiki/Ernst_Heinrich_Weber

The aroma can be very potent, detectable at a sensory threshold as low as 1.6 parts per billion (µg/l). The exact compound ... Martineau, B., Acree, T.E. and Henick-Kling, T "Effect of wine type on the detection threshold for diacetyl" Food Research ... At an odor detection threshold of 0.2 mg/l in white wines and 2.8 mg/l in red wines, it can be perceived as slightly buttery or ... The primary role of malolactic fermentation is to deacidify wine.[6] It can also affect the sensory aspects of a wine, making ...

https://en.m.wikipedia.org/wiki/Malolactic_fermentation

Sensory overload[edit]. When exposed to a multitude of sounds from several different sources, sensory overload may occur. This ... Temporary threshold shifts can result in different types of fatigue. Short-term fatigue[edit]. Recovery from temporary ... Finneran, J. J., Schlundt, C.E. (2013). Effects of fatiguing tone frequency on temporary threshold shift in bottlenose dolphins ... Temporary threshold shifts[edit]. When exposed to noise, the human ear's sensitivity to sound is decreased, corresponding to an ...

https://en.wikipedia.org/wiki/Listener_fatigue

E.H. Weber built upon Herbart's work and tried to prove the existence of a psychological threshold, saying that a minimum ... Today these differences, such as sensory and motor functioning (reaction time, visual acuity, and physical strength) are ... stimulus was necessary to activate a sensory system. After Weber, G.T. Fechner expanded upon the knowledge he gleaned from ... by the British Association for the Advancement of Science to investigate the possibility of quantitatively estimating sensory ...

https://en.wikipedia.org/wiki/Psychometric

The state of the reflex system is dependent on both a conscious signal from the brain and the firing rate of sensory fibers ... After transection of the brain stem just above the pons, the threshold is lowered and less bladder filling is required to ... Action potentials carried by sensory neurons from stretch receptors in the urinary bladder wall travel to the sacral segments ... stretch receptors in the bladder wall initiate a reflex contraction that has a lower threshold than the inherent contractile ...

https://en.wikipedia.org/wiki/Urination

This correlation can be seen especially in adults who have low neurological thresholds (sensory sensitivity and sensory ... Sensory craving/seeking.. Sensory-based motor disorder (SBMD)[edit]. Sensory-based motor disorder shows motor output that is ... Sensory processing disorders are classified into three categories: sensory modulation disorder, sensory-based motor disorders ... Sensory processing model[edit]. In Miller's nosology "sensory integration dysfunction" was renamed into "Sensory processing ...

https://en.wikipedia.org/wiki/Sensory_Processing_Disorder

... degree of eventual sensory hearing loss). In addition, the assumption that the pressure of perilymph is equal to ICP does not ... physiological variability of the reflex threshold, functional integrity of the cochlear and facial nerves, ...

https://en.wikipedia.org/wiki/Non-invasive_intracranial_pressure_measurement_methods

Nerve stimulation and sensory responses are now often performed during the surgery to confirm function of the sensory nerves.[ ... a medical device used to measure sensitivity thresholds. Values were recorded. The authors note that there are no control data ... with 9 undergoing extended vibratory sensory testing. The initial tests were performed on the inner thigh, labia majora, labia ...

https://en.wikipedia.org/wiki/Intersex_medical_interventions

... high threshold (HT), and low threshold (LT).[6] These classifications are based on their responses to mechanical stimuli.[6] ... C fibers are one class of nerve fiber found in the nerves of the somatic sensory system.[1] They are afferent fibers, conveying ... includes CT fibres, also known as C low-threshold mechanoreceptors (CLTM), which are unmyelinated afferents found in human ... has a higher threshold of activation regarding heat of about 52 °C and also responds to capsaicin and low pH.[1] Both types of ...

https://en.wikipedia.org/wiki/Group_C_nerve_fiber

... increased sensory threshold), the adoption of a typical posture, and the occupation of a sheltered site, all of which is ... characterized by passivity and increased thresholds for sensory stimuli as well as changes in the EEG pattern, markedly ...

https://en.wikipedia.org/wiki/Sleep_in_animals

Regardless of the sensory domain, there are three main areas of investigation: absolute thresholds, discrimination thresholds ... Absolute threshold is also often referred to as detection threshold. Several different methods are used for measuring absolute ... For 'absolute thresholds' again the subject reports whether they are able to detect the stimulus. For 'difference thresholds' ... A threshold is estimated from the mean midpoint of all runs. This estimate approaches, asymptotically, the correct threshold. ...

https://en.wikipedia.org/wiki/Psychophysics

T units have low thresholds and narrow tuning. The separate processing of information continues passed the primary sensory ... Barlow HB (1961). "Possible principles underlying the transformation of sensory messages". Sensory communication. Cambridge, MA ... rather than faithful copying of the sensory world onto a sensory map in the brain. For example, in the visual system, they ... Early in the sensory pathway feature detectors tend to have simple properties; later they become more and more complex as the ...

https://en.m.wikipedia.org/wiki/Feature_detection_

The complex also contributes to integrating modulatory and sensory inputs which feed its larger network with the capacity to ... which allows neurons to intrinsically fire action potentials at sub-threshold membrane potentials. Studies have shown that the ... the pre-Bötzinger complex is also capable of integrating sensory information from changes in the biochemical environment, ...

https://en.wikipedia.org/wiki/Pre-Bötzinger_complex

Quantitative sensory testing can be used to determine pain thresholds (decreased pain threshold indicates allodynia) and ... Sensory neurons produce antinociceptive effects in inflammatory pain: involvement of inflammatory mediators" (PDF). J. Neurosci ... "Methylprednisolone and Ketorolac rapidly reduce hyperalgesia around a skin burn injury and increase pressure pain thresholds". ...

https://en.m.wikipedia.org/wiki/Hyperalgesia

https://fa.wikipedia.org/wiki/ادرار_کردن?match=en

Sensory information arriving at the lateral aspect of the amygdala is processed and conveyed to the amygdala's central nucleus ... posits that the accumulation of stressors across a lifespan can enhance the development of psychopathology once a threshold is ...

https://en.wikipedia.org/wiki/Hypothalamic-pituitary-adrenal_axis

The olfactory system, or sense of smell, is the sensory system used for smelling (olfaction). Olfaction is one of the special ... "Olfactory threshold in Parkinson's disease". Journal of Neurology, Neurosurgery & Psychiatry. 50 (1): 88-89. doi:10.1136/jnnp. ... Olfactory sensory neurons in the epithelium detect odor molecules dissolved in the mucus and transmit information about the ... "Sniffing out the Contributions of the Olfactory Tubercle to the Sense of Smell: Hedonics, Sensory Integration, and More?" ...

https://en.wikipedia.org/wiki/Olfactory_system

A liability threshold model for ALS proposes that cellular damage accumulates over time due to genetic factors present at birth ... Sensory nerves and the autonomic nervous system are generally unaffected, meaning the majority of people with ALS maintain ...

https://en.wikipedia.org/wiki/Lou_Gehrig's_disease

https://en.wikipedia.org/wiki/Sensory_processing_sensitivity

This threshold reference dose for foods (such as cow's milk, egg, peanut and other proteins) will provide food manufacturers ... Histamine also causes itchiness by acting on sensory nerve terminals. The most common antihistamine given for food allergies is ... threshold quantities below which labeling may be of no purpose, and validation of allergen detection methods to test and ...

https://en.wikipedia.org/wiki/Food_allergy

O'Mahony, Michael (1986). Sensory Evaluation of Food: Statistical Methods and Procedures. CRC Press. p. 487. ISBN 0-82477337-3 ... If the calculated p-value is below the threshold chosen for statistical significance (usually the 0.10, the 0.05, or 0.01 level ...

https://en.wikipedia.org/wiki/Student's_t-test

A Arenz; E Bracey; T Margrie (2009). "Sensory representations in cerebellar granule cells". Current Opinion in Neurobiology. 19 ... Local Spine Boost and Global Low-Threshold Spike". The Journal of Neuroscience. 25 (14): 3521-3530. doi:10.1523/JNEUROSCI.4746- ... This allows the granule cells to regulate the processing of the sensory input in the olfactory bulb.[20] The olfactory bulb ... altering motor behaviour based on the nature of the sensory input. ...

https://en.wikipedia.org/wiki/Granule_cell

... dark-adapted visual thresholds, vascular diameters, pupillometry, electroretinography (ERG), multifocal ERG and optical ... "Sensory Reception: Human Vision: Structure and function of the Human Eye" vol. 27, Encyclopædia Britannica, 1987 ...

https://en.wikipedia.org/wiki/Retina

Upper line: average hearing thresholds. Lower long line: LDLs of this group. Lower short line: LDLs of a reference group with ... which can lead to temporary dysfunction and even to death of the sensory cells, which in turn can cause the typical symptoms of ... but fully developed EH may mechanically and chemically interfere with the sensory cells for balance and hearing, ...

https://en.wikipedia.org/wiki/Menieres_disease

... gating an orienting response towards a sensory stimulus. The anuran striatum is homologous to a portion of the amniote basal ... and then commits itself to snapping by reducing the thresholds for subsequent prey-catching responses. Even when the prey ... neurons that respond selectively to specific features of a sensory stimulus. Results showed that there were no "worm-detectors ...

https://en.wikipedia.org/wiki/Vision_in_toads

If the threshold is taken as 14 Hz, then the slowest beta wave has about the same duration as the longest spike (70 ms), which ... Displays during cross-modal sensory processing (perception that combines two different senses, such as sound and sight)[75][76] ... A simple approach to deal with artifacts is to simply remove epochs of data that exceed a certain threshold of contamination, ... Beck placed electrodes directly on the surface of the brain to test for sensory stimulation. His observation of fluctuating ...

https://en.wikipedia.org/wiki/Electroencephalogram

Sensory biasEdit. The sensory bias hypothesis states that the preference for a trait evolves in a non-mating context, and is ... Polyandry thresholdEdit. There also seems to be a "polyandry threshold" where males may do better by agreeing to share a female ... Another example of sensory exploitation is in the water mite Neumania papillator, an ambush predator that hunts copepods (small ... Other examples for the sensory bias mechanism include traits in auklets,[23] wolf spiders,[24] and manakins.[25] Further ...

https://en.m.wikipedia.org/wiki/Behavioural_ecology

... or they may be blind and rely on other sensory inputs. A number of deep sea creatures are bioluminescent; this serves a variety ...

https://en.wikipedia.org/wiki/Habitat

detection of chemical stimulus involved in sensory perception of bitter taste. • signal transduction. • response to stimulus. • ... It appears that while TAS2R38 genotypes determine a threshold of PROP tasting abilities, the genotypes cannot account for the ... differences in tasting amongst each threshold group. For example, some PAV/PAV homozygotes perceive PROP to be more bitter than ...

https://en.wikipedia.org/wiki/TAS2R38

Sensory. LSD causes an animated sensory experience of senses, emotions, memories, time, and awareness for 6 to 20 hours, ... Threshold effects can be felt with as little as 25 micrograms of LSD.[90][91] Dosages of LSD are measured in micrograms (µg), ... Some sensory effects may include an experience of radiant or more vibrant colors, objects and surfaces appearing to ripple, " ... He said this would be a threshold dose based on the dosages of other ergot alkaloids. Hofmann found the effects to be much ...

https://en.m.wikipedia.org/wiki/LSD

Feed efficiency, carcass characteristics, and sensory quality of lambs, with or without prolific ancestry, fed diets with ...

https://en.wikipedia.org/wiki/Feed_conversion_ratio

Prey animals make use of a variety of mechanisms including camouflage and mimicry to misdirect the visual sensory mechanisms of ...

https://en.wikipedia.org/wiki/Predator

Words of low threshold, higher level of meaning and importance, such as one's name and "watch out", redirects one's attention ... A brain simply cannot process all sensory information that is occurring in an environment so only the most relevant and ... Treisman also suggests that a threshold mechanism exists in selective auditory attention in which words from the unattended ... Deutsch's model theorizes that all information and sensory input are attended to and processed for meaning.[11] Later in the ...

https://en.m.wikipedia.org/wiki/Selective_auditory_attention

The olfactory system, or sense of smell, is the part of the sensory system used for smelling (olfaction). Most mammals and ... Quinn, N P; Rossor, M N; Marsden, C D (1 January 1987). "Olfactory threshold in Parkinson's disease". Journal of Neurology, ... "Sniffing out the Contributions of the Olfactory Tubercle to the Sense of Smell: Hedonics, Sensory Integration, and More?" ... integrates auditory and olfactory sensory info to complete the aforementioned tasks, and plays a role in transmitting positive ...

https://en.wikipedia.org/wiki/Olfactory_cortex

Measuring and Testing Sensory Thresholds Defining and measuring sensory thresholds requires setting the sensitivity limit such ... Several different sensory thresholds have been defined; Absolute threshold: the lowest level at which a stimulus can be ... In measuring sensory threshold, noise must be accounted for. Signal noise is defined as the presence of extra, unwanted energy ... When related to motion in any of the possible six degrees of freedom (6-DoF), the fact that sensory thresholds exist is why it ...

https://en.wikipedia.org/wiki/Sensory_threshold

Plants, Perception and the Practice of Gardening: Lowering the Sensory Threshold. By seattlepi.com staff on November 12, 2010 ... The garden, with its combination of scenic and sensory effects, is a work of art that represents the designers idea of order. ...

https://blog.seattlepi.com/artdish/2010/11/12/plants-perception-and-the-practice-of-gardening-lowering-the-sensory-threshold/

... Coverage decision. L&I does not cover sensory nerve conduction ... Sensory Nerve Conduction Threshold (sNCT) testing evaluates a variety of sensory neuropathological conditions, including ... threshold testing. The evidence does not substantially demonstrate the use of sNCT to diagnose sensory neuropathies. ... The test is intended to detect and quantify sensory neurophathies by assessing the conduction of all three major sub- ...

https://www.lni.wa.gov/ClaimsIns/Providers/TreatingPatients/ByCondition/CovMedDev/SpecCovDec/EsNCT.asp

Chronic phantom limb pain: the effects of calcitonin, ketamine, and their combination on pain and sensory thresholds.. ... Pain thresholds were unaffected by calcitonin. The analgesic effect of the combination of calcitonin and ketamine was ... Pain thresholds after electrical, thermal, and pressure stimulation were recorded before and during each infusion. ... Sensory assessments indicated that peripheral mechanisms are unlikely important determinants of phantom limb pain. Ketamine, ...

https://www.ncbi.nlm.nih.gov/pubmed/18349204

Our results show that thermal sensory thresholds measured with the two devices are comparable. However, our data suggest that, ... In order to analyze whether this noise could influence the thermal threshold measurements we compared the thresholds obtained ... of intrinsic noise generated by a thermotesting device on thermal sensory detection and thermal pain detection thresholds.. ... At each session, heat, heat pain, cold, and cold pain thresholds were determined with three measurements. Bland-Altman analysis ...

https://www.ncbi.nlm.nih.gov/pubmed/19367649

Chiral Terpenes - Quantitation, Threshold Determination and Sensory Impact on Aromatic White Wines. AVF Proj. ID: 567 / Year ... Threshold Determination and Sensory Impact on Aromatic White Wines. ... Cat.: Enology, Sensory Aldehydes Primary Investigator(s): Elizabeth Tomasinoby AVF. Objective 1 - Development of methodology ... Once quantitation of enantiomers is achieved the impact of the enantiomers will be investigated through a series of sensory ...

https://www.avf.org/research-summary/chiral-terpenes-quantitation-threshold-determination-and-sensory-impact-on-aromatic-white-wines-2/

Lab report on Sensory Threshold In this lab the purpose is to test the sensory threshold of a human body. To say it in terms ... Lab report on Sensory Threshold In this lab the purpose is to test the sensory threshold of a human body. To say it in terms ... Lab Report On Sensory Threshold. Essay by PaperNerd Contributor, College, Undergraduate, November 2001 ... "Lab Report On Sensory Threshold," WriteWork.com, https://www.writework.com/essay/lab-report-sensory-threshold (accessed January ...

https://www.writework.com/essay/lab-report-sensory-threshold

Cutaneous sensory detection thresholds were lower for stimuli presented at R+300 ms than R+0 ms or R+600 ms. The finding that ... Sensory detection thresholds are modulated across the cardiac cycle: evidence that cutaneous sensibility is greatest for ... Sensory detection thresholds are modulated across the cardiac cycle: evidence that cutaneous sensibility is greatest for ... Sensory detection thresholds are modulated across the cardiac cycle: evidence that cutaneous sensibility is greatest for ...

https://dspace.lboro.ac.uk/dspace-jspui/handle/2134/15150

Recent initiatives have developed novel protocols for quantitative sensory testing (QST). Application of these methods led to ... intriguing findings, such as the presence lower pain-thresholds in healthy children compared to healthy adolescents. In this ... Overcoming pain thresholds with multilevel models-an example using quantitative sensory testing (QST) data. Gerrit Hirschfeld1 ... Pain, Thresholds, Signal detection theory, Sensitivity, Multilevel models, Quantitative sensory testing Copyright. © 2015 ...

https://peerj.com/articles/1335/

Thermal Sensory Limen (TSL) and Mechanical Detection Threshold (MDT). The only unchanged sensory detection threshold was ... were observed for the following sensory detection thresholds: Cold Detection Threshold (CDT), Warm Detection Threshold (WDT), ... but not pain threshold changes. We thus conclude that a relaxation suggestion has no genuine effect on sensory pain thresholds ... No significant changes were observed for the determined pain detection thresholds (Cold Pain Thresholds, Heat Pain Thresholds, ...

https://bmccomplementalternmed.biomedcentral.com/articles/10.1186/1472-6882-14-496

Sensory thresholds are ill-deﬁned in theory (Lawless and Heymann 1998; Morrison 1982).A good determination requires hundreds of ... doubts even the existence of a sensory threshold. A. ﬁrst reaction is that it is futile to invest time and money in threshold ... Sensory thresholds are ill-deﬁned in theory (Lawless and Heymann 1998; Morrison 1982). ... Burke 1988). Published group thresholds (Fazzalari 1978; Van Gemert and Nettenbreijer. 1984; Devos et al. 1990) vary by a ...

https://www.taylorfrancis.com/books/9780429195143/chapters/10.1201/b16452-12

A compression/ischemia-induced (differential) nerve block in conjunction with repeated quantitative sensory testing of A-delta ... The aim was to investigate if DMA and SMA could be assessed at perception threshold level using short or longer lasting usually ... Implications Techniques to quantify the different allodynias at perception threshold level deserve further attention as ... using cold and warm stimuli was used to assess which nerve fibre population that contributes to pain at perception threshold ...

https://www.degruyter.com/view/j/sjpain.2011.2.issue-1/j.sjpain.2010.08.001/j.sjpain.2010.08.001.xml

5C). Inflammatory mediators that enhance pain through effects on the thresholds of activation of sensory neurons had little or ... The conditional null mice were healthy with a normal number of sensory neurons and normal acute pain thresholds. Behavioral ... However, the majority of Dicer-null, mutant-derived Nav1.8+ sensory neurons showed normal thresholds of activation. Nineteen of ... although hundreds were expressed at higher levels than those in normal sensory neurons (Fig. 6B). Surprisingly, many sensory ...

http://www.jneurosci.org/content/30/32/10860.full

... an effort to more fully understand the results of long term exposures to impulse noise as they relate to asymptotic threshold ... NIOSH-Grant; Noise-induced-hearing-loss; Noise-exposure; Laboratory-animals; Hearing-threshold; Sensory-thresholds ... Threshold shift at 8kHz had reached an asymptotic level within 1 hour from the start of the exposure while threshold shift at ... Maximum permanent threshold shift was at 2 and 2.8kHz with median PTS of 17 and 13dB, respectively. The cochleas were examined ...

https://www.cdc.gov/niosh/nioshtic-2/00197926.html

The temporary threshold shift (TTS) caused by repeated short duration noise bursts lasting less than 1 second was studied. ... NIOSH-Grant; Noise-induced-hearing-loss; Noise-exposure; Impulse-noise; Hearing-threshold; Sensory-thresholds; Humans ... The temporary threshold shift (TTS) caused by repeated short duration noise bursts lasting less than 1 second was studied. ... http://journals.lww.com/ear-hearing/Abstract/1975/07000/Temporary_Threshold_Shift_From_Short_Duration.2.aspx ...

https://www.cdc.gov/niosh/nioshtic-2/00190481.html

... applying electrical stimulation to a target neural region at an initial current level that approximates a typical threshold- ... Methods for preventing/treating damage to sensory hair cells and cochlear neurons. ... threshold to be defined with reference to the first minimum stimulus threshold and the second minimum stimulus threshold. For ... infra-threshold process 400 begins at block 402. At block 404 the initial stimulus current level is set to a level which is as ...

http://www.google.ca/patents/US8965520

II congenital sensory neuropathy. *III familial dysautonomia. *IV congenital insensitivity to pain with anhidrosis ... The threshold of pain or pain threshold is the point along a curve of increasing perception of a stimulus at which pain begins ... People who have been exposed to more noise/music usually have a higher threshold pressure.[3] Threshold shift can also cause ... Different values for pain threshold pressure level and pain threshold pressure are found in the literature:[5][6][4] ...

https://en.wikipedia.org/wiki/Pain_threshold

Thermal Quantitative Sensory Thresholds. Tests were performed using Somedic SENSELab MSA II equipment with a handheld ... Three secondary composite variables that reflected thermal detection thresholds, pain thresholds, and nerve conduction measures ... quantitative sensory thresholds, and for the NCS. Data were assessed for normality and transformed with power or logarithmic ... The glycemic thresholds for counterregulatory responses, generation of symptoms, and cognitive impairment are reset at lower ...

http://care.diabetesjournals.org/content/39/3/426.long

Sensory perception testing. Patient characteristics by average resting hot pain threshold are shown in Table 2. Compared with ... Sensory perception testing. Results from the Marstock test of cutaneous sensory perception were obtained at baseline after the ... The solid linerefers to patients with hot pain threshold ≥41°C, and the broken linerefers to patients with hot pain threshold , ... Patients were divided into two groups: 1) average hot pain threshold ,41°C; and 2) average hot pain threshold ≥41°C. Previous ...

http://www.onlinejacc.org/content/33/7/1855

Quantitative testing of sensory thresholds. Tactile thresholds.. To quantitatively assess tactile thresholds and deficits of ... Thermal thresholds.. Heat pain threshold, cold pain threshold, warm detection threshold, and innocuous cool detection threshold ... Previous studies using sensory testing indicate that pain thresholds are elevated after lesions involving the posterior insula ... 1, Table 1). A group of 14 healthy older adults was recruited to assess differences in pain perception, sensory thresholds, and ...

http://www.jneurosci.org/content/29/9/2684?ijkey=6f88191a5c43d1c04f747b738d3e352469b62382&keytype2=tf_ipsecsha

Rectal Heat Thresholds: A Novel Test of the Sensory Afferent Pathway. Chan, Christopher L. H.; Scott, Mark S.; Birch, Malcolm J ...

https://journals.lww.com/dcrjournal/toc/2003/46050

Sensory System Agents. Peripheral Nervous System Agents. Adjuvants, Anesthesia. Anesthetics, Intravenous. Anesthetics, General ... Fentanyl Ultra Low Doses Effects on the Nociceptive Threshold (FENTANULD). The safety and scientific validity of this study is ... Nociceptive threshold evaluated with sternal electronical Von Frey mechanical stimulation. The stimulation will increase until ... Fentanyl Ultra Low Doses Effects on Human Volunteers Nociceptive Threshold. Towards a Simple Pharmacological Test Able to ...

https://clinicaltrials.gov/ct2/show/NCT00454259

S Sensory and Nutritive Qualities of Food - Determination of Sensory Thresholds of Selected Calcium Salts and Formulation of ... S Sensory and Nutritive Qualities of Food - Determination of Sensory Thresholds of Selected Calcium Salts and Formulation of ... S Sensory and Nutritive Qualities of Food - Effect of Sensory Characteristics and Non-sensory Factors on Consumer Liking of ... Determination of Sensory Thresholds of Selected Calcium Salts and Formulation of Calcium‐fortified Pocket‐type Flat Bread ...

https://www.tib.eu/en/search/id/BLSE%3ARN179618010/Determination-of-Sensory-Thresholds-of-Selected/

We present for the first time, a framework to simulate PNS thresholds for realistic coil geometries to directly address PNS in ... With this model, we were able to reproduce measured PNS thresholds of two leg/arm solenoid coils with good agreement. ... mainly through using the size of the linear region as a proxy for PNS thresholds or by conducting human experiments after ... Recoskie, B. J., Scholl, T. J., Zinke-Allmang, M. & Chronik, B. A. Sensory and motor stimulation thresholds of the ulnar nerve ...

https://www.nature.com/articles/s41598-017-05493-9?error=cookies_not_supported&code=03c606e7-90e4-4afb-9a98-7bf2bf1f639b

Quantitative sensory threshold testing. We have had an immediate response from one of our readers (SS) who has found 5 articles ... thereby providing a measurement of genital sensory threshold. This is different to nerve conduction studies which also use ... Quantitative sensory testing is the collective term for a group of tests that are used to assess skin sensation. Devices which ... Thermal thresholds are assessed by placing a probe onto the body part being investigated. The temperature of the probe then ...

https://rxisk.org/antidepressants-sex-and-thermal-thresholds/?utm_source=June+2018+Newsletter&utm_campaign=June+News&utm_medium=email

The minimum amount of stimulus energy necessary to elicit a sensory response. ... Summary of "Physiological Thresholds in the Context of Marine Mammal Conservation.". There is growing evidence of the adverse ... Physiological Thresholds in the Context of Marine Mammal Conservation.. 07:00 EST 1st January 2019 , BioPortfolio ... Metabolic Thresholds and Fat Utilization Points Correlation. To examine existence of connection between fat utilization points ...

https://www.bioportfolio.com/resources/pmarticle/2466426/Physiological-Thresholds-in-the-Context-of-Marine-Mammal-Conservation.html

Although vestibular sensory detection thresholds were similar in PLV and control groups, mechanical and cold pain thresholds ... Reduced forearm pain thresholds in these patients suggest altered sensory processing at extrapelvic sites, although it is ... Our report of normal vestibular thermal sensory detection thresholds combined with reduced thermal (cold and heat) and ... Sutton KS, Pukall CF, Chamberlain S. Pain ratings, sensory thresholds, and psychosocial functioning in women with provoked ...

https://jaoa.org/article.aspx?articleid=2726849

Quantitative Sensory Testing and Current Perception Threshold Testing in Patients With Chronic Pain Following Lower Extremity ... Quantitative Sensory Testing and Current Perception Threshold Testing in Patients With Chronic Pain Following Lower Extremity ... Quantitative Sensory Testing and Current Perception Threshold Testing in Patients With Chronic Pain Following Lower Extremity ... title = "Quantitative Sensory Testing and Current Perception Threshold Testing in Patients With Chronic Pain Following Lower ...

https://jhu.pure.elsevier.com/en/publications/quantitative-sensory-testing-and-current-perception-threshold-tes

The butanol threshold test involves a forced-choice test using an aqueous concentration of butyl alcohol in one sniff bottle ... Age-Related Sensory Impairments and Risk of Cognitive Impairment. J Am Geriatr Soc. 2016 Oct. 64 (10):1981-7. [Medline]. [Full ... The butanol threshold test involves a forced-choice test using an aqueous concentration of butyl alcohol in one sniff bottle ... The detection threshold is recorded as the concentration at which the patient correctly identifies the butanol on 5 consecutive ...

https://www.medscape.com/answers/861242-168558/1214270-overview

In Sensory Biology of Aquatic Animals (ed. Atema, J., Fay, R. R., Popper, A. N. and Tavolga, W. N.), pp. 131-149. New York, NY ... compare particle acceleration thresholds to pressure thresholds to better separate each aspect of underwater sound for acoustic ... 2004). Evolution of sensory hair cells. In Evolution of the Vertebrate Auditory System (ed. Manley, G. A., Popper, A. N. and ... Hearing thresholds for all fish species were similar at 400, 600 and 800 Hz, ranging from −30 to −15 dB re. 1 m s−2. More ...

https://jeb.biologists.org/content/215/19/3429

Weber was able to define absolute and difference threshold statistically which led to the establishment of Weber's Law and the concept of just noticeable difference to describe threshold perception of stimuli. (wikipedia.org)
There are three common methods used to determine sensory thresholds: Method of Limits: In the first step, the subject is stimulated by strong, easily detectable stimuli that are decreased stepwise (descending sequence) until they cannot detect the stimulus. (wikipedia.org)
Intensities involve stimuli which are surely subthreshold and stimuli which are surely supra-threshold. (wikipedia.org)
Cutaneous sensory detection thresholds were lower for stimuli presented at R+300 ms than R+0 ms or R+600 ms. The finding that cutaneous sensibility was greater when stimulated during systole than diastole may be accounted for by a modified afferent feedback hypothesis. (lboro.ac.uk)
The absolute threshold can be compared to the difference threshold , which is the measure of how different two stimuli must be for the subject to notice that they are not the same. (wikipedia.org)
A compression/ischemia-induced (differential) nerve block in conjunction with repeated quantitative sensory testing of A-delta and C-fibre function using cold and warm stimuli was used to assess which nerve fibre population that contributes to pain at perception threshold level using 1 s (vF1) and 10 s (vF10) von Frey filament stimulation of the skin. (degruyter.com)
Detection and pain thresholds to thermal (cold and heat) and mechanical (pressure) stimuli were measured. (jaoa.org)
The smallest difference which can be discriminated between two stimuli or one which is barely above the threshold. (harvard.edu)
This study explores the relationships among anxiety, sensitivity to sensory stimuli, and picky eating (PE). (bioportfolio.com)
Sensory neurons of the dorsal root ganglia (DRG) are the primary responders to stimuli inducing feelings of touch, pain, temperature, vibration, pressure and muscle tension. (bioportfolio.com)
The ability of the BRAIN to suppress neuronal responses to external sensory inputs, such as auditory and visual stimuli. (bioportfolio.com)
Sensory filtering (or gating) allows humans to block out irrelevant, meaningless, or redundant stimuli. (bioportfolio.com)
Specialized afferent neurons capable of transducing sensory stimuli into NERVE IMPULSES to be transmitted to the CENTRAL NERVOUS SYSTEM. (bioportfolio.com)
Peroperative recordings of 2012 single units revealed an overwhelming unresponsiveness (99%) to sensory stimuli or motor activation. (sonimodul.ch)
The specific stimuli have to be integrated, detected and transmitted to the brain in order to reach sensory consciousness. (wikibooks.org)
Optogenetics and optical neurophysiology reveal efficient sensory encoding of both favorable (warming) and unfavorable (cooling) stimuli for distinct components of thermotactic strategy by this one set of neurons. (pnas.org)
Psychophysics is the study of physical stimuli and their relation to sensory reactions. (encyclopedia.com)
The temporal discrimination threshold (TDT) is the shortest time interval at which an observer can discriminate two sequential stimuli as being asynchronous (typically 30-50 ms). It has been shown to be abnormal (prolonged) in neurological disorders, including cervical dystonia, a phenotype of adult onset idiopathic isolated focal dystonia. (jove.com)
The temporal discrimination threshold (TDT) is the shortest time interval at which an individual can perceive that two sequential sensory stimuli are asynchronous. (jove.com)
The TDT is a simple, objective measure believed to represent the processing of visual (and other sensory stimuli) in the superficial layers of the superior colliculus. (jove.com)
Timelige diskriminering terskelen (TDT) er det korteste tidsintervallet som observatør kan diskriminere to sekvensiell stimuli som asynkrone (vanligvis 30-50 ms). Det har vist seg å være unormalt (lengre) i nevrologiske lidelser, inkludert cervical Dystoni, en fenotypen av voksen utbruddet idiopatisk isolert fokal Dystoni. (jove.com)
Timelige diskriminering terskelen (TDT) er det korteste tidsintervallet der en person kan oppfatte at to sekvensiell sensoriske stimuli er asynkron. (jove.com)
Overlegen colliculus, en sensorimotor struktur i dorsal mellomhjernen, er viktig for rask påvisning av miljømessige stimuli under skjult attentional orientere 2 , 11 , 12 . (jove.com)
In other words, sleeping persons perceive fewer stimuli, but can generally still respond to loud noises and other salient sensory events. (wikipedia.org)

Through sensory nerves, the receptors relay the taste sensation information to the brain. (scientificamerican.com)
That's again because the sensory receptors in your [ear], they become desensitized. (khanacademy.org)
Which areas of the skin have more sensory receptors? (utah.edu)
Which areas of the skin have more temperature-sensitive sensory receptors? (utah.edu)
The evolution of the accessory structures (e.g. lenses in the eye), peripheral receptors and regions of the central nervous system that together form sensory systems is often viewed solely in terms of the benefits they provide to an animal, i.e. information about the animal's internal and external environments. (biologists.org)
Extracting germane information from internal and external environments requires sensory receptors (with their accessory structures) to sample these environments and central circuits to analyse and interpret the incoming information. (biologists.org)

In this science activity, you (and maybe some friends or family) will find out by exploring your taste thresholds for sweetness, saltiness and sourness. (scientificamerican.com)
Taste thresholds of further eighteen compounds and their correlation with P.T.C. thresholds. (springer.com)
Human taste thresholds for sucrose octaacetate. (springer.com)

Measuring and Testing Sensory Thresholds Defining and measuring sensory thresholds requires setting the sensitivity limit such that the perception observations lead to the absolute threshold. (wikipedia.org)
The level of sensitivity is usually assumed to be constant in determining the threshold limit. (wikipedia.org)
No significant changes were observed for the determined pain detection thresholds (Cold Pain Thresholds, Heat Pain Thresholds, Mechanical Pain Sensitivity, Dynamic Mechanical Allodynia, Wind-up Ratio and Pressure Pain Threshold). (biomedcentral.com)
As the name implies what sensory adaptation is is a change in the sensitivity of your perception of a sensation. (khanacademy.org)
A common feature of ASD is over or under sensitivity to the environment and difficulty putting sensory information together in an orderly way, referred to here as sensory issues. (bioportfolio.com)
Sensory sensitivity mediates the relationship between anxiety and picky eating in children/ adolescents ages 8-17, and in college undergraduates: A replication and age-upward extension. (bioportfolio.com)
As a measure of each preparation's greatest sensitivity to 5HT, we first determined the lowest 5HT concentration that produced increased excitability in the SNs ('threshold' 5HT). (elsevier.com)
Background Testing of vibration perception threshold (VPT) at the fingertips as a quantitative measure of tactile sensitivity is a commonly used tool in diagnosing hand-arm vibration syndrome. (bmj.com)
For the similarly-named personality trait distinct from the disorder, see Sensory processing sensitivity . (wikipedia.org)
The problem of sensitivity involves the determination of the smallest detectable intensity of a stimulus (called the absolute threshold), often as a function of another stimulus dimension, such as wavelength, frequency, duration, or areal extent. (encyclopedia.com)
Sensitivity is also subject to systematic variation, either of the permanent kind encountered in aging or in pathology of the sensory tissues, or of a temporary kind observed, for example, in the relatively rapid decline of visual sensitivity under exposure to light (light adaptation) and the subsequent gradual recovery of sensitivity in the dark (dark adaptation). (encyclopedia.com)
These and many other systematic changes in sensitivity are frequently expressed as alterations of the absolute threshold. (encyclopedia.com)
The study of absolute thresholds reveals the exquisite sensitivity of the sense organs under optimal conditions. (encyclopedia.com)

Pain thresholds after electrical, thermal, and pressure stimulation were recorded before and during each infusion. (nih.gov)
Separate interleaving up-down staircases were used to determine the 50% detection threshold for each R-wave to stimulation interval. (lboro.ac.uk)
By including estimates for the probability of an average photon being absorbed by an average rod cell, the threshold stimulation for the rods is approximately one photon absorption per second per 5000 rods. (wikipedia.org)
The minimum magnetic field modulation strength dB switched at rise time dt is a commonly used measure of the PNS stimulation thresholds (note that dt determines the pulse duration of the electric field). (nature.com)
Other studies have reviewed dB/dt at threshold for body MRI gradients noting that the dB/dt at stimulation ranged from 12.4 T/s to 54 T/s 6 . (nature.com)
The current paper posits that peripheral sensory stimulation paradigm, which has been shown to be efficacious in improving several neurological conditions, could be an important therapeutic strategy in OSA also. (hindawi.com)
Tooth pain thresholds (PT) were measured before and after stimulation with a computerized electrical pulp tester. (ocom.edu)
Effects of thermal agents on electrical sensory threshold and current tolerance when applied prior to neuromuscular electrical stimulation. (physiospot.com)
This study's goal was to examine the effects of thermal agents on electrical sensory threshold and current tolerance when applied immediately before neuromuscular electrical stimulation. (physiospot.com)

Various factors can influence thermal perception threshold measurements and contribute significantly to unwanted variability of the tests. (nih.gov)
The aim of this human study was to measure the underlying excitability modulation of small cutaneous nerve fibers using a novel and fast perception threshold tracking (PTT) technique. (aau.dk)
The aim was to investigate if DMA and SMA could be assessed at perception threshold level using short or longer lasting usually non-painful von Frey filament prodding of the neuropathic skin. (degruyter.com)
Method: This was a cross-sectional study where quantitative sensory testing and current perception threshold testing were conducted on the injured and noninjured legs of cases and both legs of controls. (elsevier.com)
This is the first study to examine peripheral sensory nerve function at the site of injury in patients with chronic pain following lower extremity fractures using quantitative sensory testing and current perception threshold testing. (elsevier.com)
A Neurometer device is an electrical nerve stimulator used to determine the current perception threshold (CPT) evoked by stimulating A-beta fibers at 2,000 Hz, A-delta fibers at 250 Hz and C fibers at 5 Hz. (europeanspinejournal.org)
Gregersen G (1968) Vibratory perception threshold and motor conduction velocity in diabetics and non-diabetics. (springer.com)
We assessed the characteristics of sensory perception and processing in PD patients using current perception threshold (CPT). (kagawa-u.ac.jp)

16 showed that balance (measured by a reduction in the anterior-posterior sway) was strongly associated with the ability to detect small movements (motion-detection thresholds). (arvojournals.org)

Methods have been developed to measure thresholds in any of the senses. (wikipedia.org)
Methods: Small sensory fibers were selectively blocked by 120-minute topical application of LP and confirmed by quantitative sensory testing. (aau.dk)
Application of these methods led to intriguing findings, such as the presence lower pain-thresholds in healthy children compared to healthy adolescents. (peerj.com)
Fortunately, there are other methods of investigating sensory issues. (rxisk.org)
Here, we compared the particle acceleration and pressure auditory thresholds of three species of fish with differing hearing specialisations, goldfish ( Carassius auratus , weberian ossicles), bigeye ( Pempheris adspersus , ligamentous hearing specialisation) and a third species with no swim bladder, the common triplefin ( Forstergyian lappillum ), using three different methods of determining particle acceleration. (biologists.org)
Direction-recognition thresholds were measured using standard methods. (frontiersin.org)
Because it fluctuates, the threshold is difficult to measure, and the various methods that have been tried do not always yield the same value. (encyclopedia.com)
Methods for the measurement and analysis of the temporal discrimination threshold are presented, and its application to the study of the pathogenesis of cervical dystonia are discussed. (jove.com)

The conditional null mice were healthy with a normal number of sensory neurons and normal acute pain thresholds. (jneurosci.org)
Inflammatory mediators failed to enhance excitability of Nav1.8 + sensory neurons from null mutant mice. (jneurosci.org)
MicroRNA microarray and deep sequencing identified known and novel nociceptor microRNAs in mouse Nav1.8 + sensory neurons that may regulate nociceptor gene expression. (jneurosci.org)
Sensory neurons are essential for pain perception, and alterations in neuronal excitability contribute to inflammatory pain. (jneurosci.org)
Clusters of neurons in the somatic peripheral nervous system which contain the cell bodies of sensory nerve axons. (bioportfolio.com)
1. The modulatory actions produced by the neurotransmitter serotonin (5HT) in Aplysia sensory neurons (SNs) can be distinguished on the basis of their concentration requirement for 5HT, their activation and recovery kinetics, and their dependence on the relative contribution of different second messenger pathways. (elsevier.com)
Emptage, NJ, Mauelshagen, J & Carew, TJ 1996, ' Threshold serotonin concentration required to produce synaptic facilitation differs for depressed and nondepressed synapses in Aplysia sensory neurons ', Journal of neurophysiology , vol. 75, no. 2, pp. 843-854. (elsevier.com)
In the case of the very simplest organisms, the entire machinery for sensing the environment and acting upon it is found within the same cell, whereas at their most elaborate, for example the mammalian visual system, peripheral sensory structures may consist of millions of neurons, with even greater numbers of neurons involved in processing the information they obtain within the central nervous system. (biologists.org)

In psychophysics, sensory threshold is the weakest stimulus that an organism can detect. (wikipedia.org)
In neuroscience and psychophysics , an absolute threshold was originally defined as the lowest level of a stimulus - light, sound, touch, etc. - that an organism could detect. (wikipedia.org)

This study was designed to evaluate the effects of hypnotic relaxation suggestion on different somatosensory detection and pain thresholds. (biomedcentral.com)
During hypnosis significantly changed somatosensory thresholds (reduced function) were observed for the following sensory detection thresholds: Cold Detection Threshold (CDT), Warm Detection Threshold (WDT), Thermal Sensory Limen (TSL) and Mechanical Detection Threshold (MDT). (biomedcentral.com)
Purpose: To quantify and compare peripheral somatosensory function and sensory nerve activation thresholds in persons with chronic pain following lower extremity fractures with a cohort of persons with no history of lower extremity fractures. (elsevier.com)
To evaluate vestibular and peripheral experimental pain thresholds in patients with PLV to further define the somatosensory profile of these patients. (jaoa.org)
Quantitative sensory testing results demonstrated that vestibular cold allodynia may be a somatosensory feature of PLV. (jaoa.org)
Vuralli D, Evren Boran H, Cengiz B, Coskun O, Bolay H. Chronic Migraine Is Associated With Sustained Elevation of Somatosensory Temporal Discrimination Thresholds. (harvard.edu)
People with non-specific chronic low back pain (NSCLBP) and central sensitisation (CS) exhibit sensory processing alterations, somatosensory hypersensitivity and differences in the brain's emotional n. (bioportfolio.com)

Edwards AEE, Kopple JD, Kornfeld CM (1973) Vibrotactile threshold in patients undergoing maintenance hemodialysis. (springer.com)
Vibrotactile thresholds (VTs) of the index and small fingers of both hands were measured before and after exercise using a Vibraton-II instrument. (cdc.gov)
Vibrotactile threshold abnormalities occurred much more often in the lower extremities. (cdc.gov)

Absolute threshold: the lowest level at which a stimulus can be detected. (wikipedia.org)
Recognition threshold: the level at which a stimulus can not only be detected but also recognised. (wikipedia.org)
Differential threshold: the level at which an increase in a detected stimulus can be perceived. (wikipedia.org)
Terminal threshold: the level beyond which a stimulus is no longer detected. (wikipedia.org)
The strength of the stimulus, perceived in more than half of the presentations will be taken as the threshold. (wikipedia.org)
Under the influence of signal detection theory , absolute threshold has been redefined as the level at which a stimulus will be detected a specified percentage (often 50%) of the time. (wikipedia.org)
[1] The absolute threshold can be influenced by several different factors, such as the subject's motivations and expectations, cognitive processes, and whether the subject is adapted to the stimulus. (wikipedia.org)
locally establishing threshold-NRT (T-NRT) at a finer stimulus resolution. (google.ca)
The threshold of pain or pain threshold is the point along a curve of increasing perception of a stimulus at which pain begins to be felt. (wikipedia.org)
Traditionally the threshold has often been defined, as we defined it formerly, as the least stimulus intensity at which a subject perceives pain. (wikipedia.org)
The intensity at which a stimulus (e.g., heat, pressure) begins to evoke pain is thus called by a separate term, threshold intensity . (wikipedia.org)
The minimum amount of stimulus energy necessary to elicit a sensory response. (bioportfolio.com)
The threshold may be defined as the stimulus value that is perceived on half the presentations. (encyclopedia.com)

L&I does not cover sensory nerve conduction threshold testing. (wa.gov)
Sensory Nerve Conduction Threshold (sNCT) testing evaluates a variety of sensory neuropathological conditions, including sensory nerve dysfunction. (wa.gov)

Despite the importance of PNS as the practical limitation to use these imaging modalities in humans, we are not able to fully incorporate PNS thresholds directly into the system design optimization. (nature.com)
We measured vestibular perceptual thresholds in 105 healthy humans (54F/51M) ranging from 18 to 80 years of age. (frontiersin.org)

Auditory thresholds were measured before exposure. (cdc.gov)
2) Like other threshold measures (e.g., auditory thresholds), vestibular thresholds have direct functional relevance. (frontiersin.org)

The study found that warm thermal thresholds at the glans produced the best results. (rxisk.org)
Thermal thresholds are assessed by placing a probe onto the body part being investigated. (rxisk.org)
PPT and thermal thresholds probably give comparable information on small fibre dysfunction in diabetic patients with symptomatic neuropathy. (northampton.ac.uk)

Our modeling approach represents an important advancement, because it allows for a more general and accurate description of perceptual thresholds for simple and complex translational motions. (nih.gov)

Principles of Sensory Evaluation of Food covers the concepts of sensory physiology and the psychology of perception. (elsevier.com)
After providing a brief introduction to problems related to sensory evaluation in food industry, this book goes on examining the physiology and psychology of the senses. (elsevier.com)
We'll also identify and describe flavor groups of wine and discuss sensory physiology including the visual, olfactory, textural, and taste aspects of various wines. (coursera.org)

Superficial tactile sensibility was tested using the Pressure Specified Sensory Device (PSSD) which allows the determination of the cutaneous pressure threshold (static and moving). (usp.br)
A avaliação da sensibilidade tátil foi realizada com o Pressure Specified Sensory Device(TM) (PSSD(TM)), aparelho que quantifica a pressão aplicada à pele, estática ou em movimento. (usp.br)

We assessed "stress-arousal symptoms", compliance, sensation thresholds, sensation ratings averaged over four levels of distension, fasting and postprandial colonic tone, and phasic motility index (MI). (physiology.org)
Pregabalin did not significantly affect colonic compliance, sensation thresholds, colonic fasting tone, and MI. (physiology.org)
Quantitative sensory testing is the collective term for a group of tests that are used to assess skin sensation. (rxisk.org)
The pinprick sensory threshold (PPT) is the lightest weighted needle which consistently elicits a sharp sensation. (northampton.ac.uk)
This minimum level of sensation is called the threshold. (medlineplus.gov)

Our secondary aim was to improve our understanding of the mechanisms of action of the investigated drugs using quantitative sensory testing. (nih.gov)
Recent initiatives have developed novel protocols for quantitative sensory testing (QST). (peerj.com)
Quantitative sensory testing (QST) measurements were performed before and during hypnosis in twenty-three healthy subjects on the dorsum of the right hand. (biomedcentral.com)
Clinical and laboratory evaluations included extensive autonomic function testing, peripheral nerve conduction studies, and quantitative sensory testing. (diabetesjournals.org)
We discussed several tests that can be used to investigate this condition including skin biopsy, corneal confocal microscopy and quantitative sensory testing. (rxisk.org)
The interesting point about quantitative sensory testing is that in addition to investigating conditions like small fibre neuropathy, it is sometimes also used in urology if a patient is experiencing genital numbness, or if they have erectile dysfunction that is suspected to involve a neuropathy. (rxisk.org)
After informed consent was provided, eligible participants completed a questionnaire and underwent quantitative sensory testing at the forearm and posterior vestibule. (jaoa.org)

Chronic phantom limb pain: the effects of calcitonin, ketamine, and their combination on pain and sensory thresholds. (nih.gov)
There was no difference in basal pain thresholds between the amputated and contralateral side except for pressure pain. (nih.gov)
Pain thresholds were unaffected by calcitonin. (nih.gov)
Sensory assessments indicated that peripheral mechanisms are unlikely important determinants of phantom limb pain. (nih.gov)
Influence of intrinsic noise generated by a thermotesting device on thermal sensory detection and thermal pain detection thresholds. (nih.gov)
In contrast, the intrasubject variability of the thresholds for heat, heat pain, and cold pain detection was significantly lower with the silent device. (nih.gov)
Bin saif GA, Alajroush A, Mcmichael A, Yosipovitch G. Healthy scalp has a reduced sensory thresholds to temperature, pain, itch and neurogenic inflammation response. (edu.sa)
Hypnotic relaxation without a specific analgesic suggestion results in thermal and mechanical detection, but not pain threshold changes. (biomedcentral.com)
We thus conclude that a relaxation suggestion has no genuine effect on sensory pain thresholds. (biomedcentral.com)
These findings suggest that the insula may be well positioned to use cognitive information to modulate connected brain areas involved in processing of sensory-discriminative, affective, and cognitive-evaluative components of pain. (jneurosci.org)
To investigate the role that the insula plays in pain processing and modulation, sensory testing and functional magnetic resonance imaging (fMRI) experiments were used to examine two patients who suffered from large left middle cerebral artery (MCA) ischemic strokes with lesions encompassing the insular cortex. (jneurosci.org)
[1] So, if a hotplate on a person's skin begins to hurt at 42 °C (107 °F), that is the pain threshold temperature for that bit of skin at that time. (wikipedia.org)
It is not the pain threshold (which is internal/subjective) but the temperature at which the pain threshold was crossed (which is external/objective). (wikipedia.org)
The temperature at which heat becomes painful for a recipient is called the heat pain threshold for that person at that time. (wikipedia.org)
One study showed that morning oriented people have higher pain threshold for heat as compared to evening oriented individuals. (wikipedia.org)
the threshold for pain is between 120 and 140 dB SPL. (wikipedia.org)
The purpose of this study was to test whether cutaneous thermal pain thresholds are related to anginal pain perception. (onlinejacc.org)
symptoms have been related to pain perception thresholds. (onlinejacc.org)
Occurrence of angina and timing of angina onset on an exercise test are related to overall hot pain sensory perception. (onlinejacc.org)
Symptoms have been variously reported to be related to levels of circulating opioid peptides or pain perception thresholds, presence or absence of neurologic disease, personality variables and the physical or mental stressors associated with a particular ischemic episode (5-11) . (onlinejacc.org)
Principal Objective : 'Evaluate fentanyl 'ultra low doses' effects on human volunteer's nociceptive threshold depending on their prior pain and opioid experience. (clinicaltrials.gov)
28 mmHg), in whom pregabalin treatment increased pain threshold (suggesting a visceral analgesic effect) and concomitantly increased rectal compliance although there was a limited range of intrarectal balloon distention pressures tested. (physiology.org)
Reduced forearm pain thresholds in these patients suggest altered sensory processing at extrapelvic sites, although it is unclear whether these measurements are related to central sensitization. (jaoa.org)
electric pain threshold at the teeth. (clinicaltrials.gov)
We hypothesized that cognitive factors would be related to LRJT performance of hands and feet and that sensory, motor, and pain related factors would be related to LRJT in the affected hand of participants with wrist/hand pain. (hindawi.com)
In an observational cross-sectional study, sixty-one participants with wrist/hand pain participated in a study assessing motor imagery ability, cognitive (Stroop test), sensory (Two-Point Orientation Discrimination, pressure pain thresholds), motor (grip strength, Purdue Pegboard Test), and pain related measures (West Haven Yale Multidimensional Pain Inventory) as well as disability (Disability of the Arm, Shoulder and Hand). (hindawi.com)
Trait anxiety and sensory processing profile characteristics in patients with non-specific chronic low back pain and central sensitisation - A pilot observational study. (bioportfolio.com)

Voiceover: In this video we're going to talk about something known as sensory adaptation. (khanacademy.org)
We're going to look at a couple of different examples of sensory adaptation. (khanacademy.org)
There's this sensory adaptation that can occur for your sense of proprioception as well. (khanacademy.org)
Another sense that undergoes sensory adaptation is your sense of sight. (khanacademy.org)

As the measurements come closer to the absolute threshold, the variability of the noise increases causing the threshold to be obscured. (wikipedia.org)
A universal absolute threshold is difficult to define a standard because of the variability of the measurements. (wikipedia.org)
In order to analyze whether this noise could influence the thermal threshold measurements we compared the thresholds obtained with a silent thermotesting device to those obtained with a commercially available device. (nih.gov)
Bland-Altman analysis was used to assess agreement in measurements obtained with different devices and it was shown that the intersubject variability of the thresholds obtained with the two devices was comparable for all four thresholds tested. (nih.gov)
selecting the initial current level to insure safety while minimizing a quantity of measurements required to determine the threshold-NRT (T-NRT) level of the target neural region. (google.ca)
In this paper, we present measurements that reveal differences in thresholds depending not only on the duration of the profile, but also on the actual time course of the acceleration. (nih.gov)
The measurements are further explained by a model based on a transfer function, which is able to predict direction detection thresholds for all types of acceleration profiles. (nih.gov)
In practice, it is most important when making VPT measurements to take into account the age and sex of the subject and possibly also to allow for thresholds slightly higher than usual with subjects engaged in physical work. (springer.com)

This may be because experimental studies describe participants' responses exclusively in terms of thresholds that conflate several aspects of the response. (peerj.com)
The glycemic thresholds for counterregulatory responses, generation of symptoms, and cognitive impairment are reset at lower levels of blood glucose in people who have developed IAH ( 4 ). (diabetesjournals.org)
The Psychophysiological Investigations of Myocardial Ischemia (PIMI) study, a multicenter study of patients with documented coronary artery disease, has multiple objectives (12) , including examination of the relations between symptoms associated with myocardial ischemia and somatic sensory threshold, autonomic reflexive control of the heart and beta-endorphin responses. (onlinejacc.org)
Food acceptance and preference depend on human sensory responses. (elsevier.com)
Devices that help people with impaired sensory responses. (bioportfolio.com)
also known as sensory integration dysfunction ) is a condition where multisensory integration is not adequately processed in order to provide appropriate responses to the demands of the environment. (wikipedia.org)

The only unchanged sensory detection threshold was Vibration Detection Threshold (VDT). (biomedcentral.com)
The detection threshold is recorded as the concentration at which the patient correctly identifies the butanol on 5 consecutive trials. (medscape.com)
WDT, warm detection threshold. (diabetesjournals.org)
Furthermore, the relationship between motion-detection threshold and an unsuccessful stand was stronger for the most difficult stand on one foot (the soleo stand) ( P = 0.02). (arvojournals.org)

The test is intended to detect and quantify sensory neurophathies by assessing the conduction of all three major sub-populations of sensory nerve fibers. (wa.gov)
The study group consisted of 119 volunteers, 238 hands, who were divided into three groups according to the presence or absence of CTS symptoms and abnormalities in sensory nerve conduction as measured by standard electrophysiological techniques. (cdc.gov)

This study is the first to examine the effects of naturally occurring variations in baroreceptor activity across the cardiac cycle on cutaneous sensory detection thresholds. (lboro.ac.uk)
The Marstock test of cutaneous sensory perception was administered at baseline after 30 min of rest on two days and after exercise and mental stress. (onlinejacc.org)

Subjective sensory experiences are constructed by the integration of afferent sensory information with information about the uniquely personal internal cognitive state. (jneurosci.org)
Unfortunately, snoring vibrations, pharyngeal suction collapse, negative pressure, and hypoxia cause pathological perturbations including dysfunctional UA afferent sensory activity. (hindawi.com)
This pathway involves the afferent sensory limb to the brain and the motor nerve limb to the muscle. (hindawi.com)

That's because the sensory nerves in your hand that are sensitive to temperature, as soon as they go off, they become saturated. (khanacademy.org)
Additional features include on/off logic control, low power consumption, small package sizes and ±0.5°C typical threshold temperature accuracy. (microchip.com)

In this study, the sensory disturbance of the lower-extremity was quantitatively analyzed using CPT testing before and after lumbar discectomy. (europeanspinejournal.org)
CPT measured by a Neurometer is very useful in assessing lower-extremity sensory functions before and after surgery for lumbar disc herniation. (europeanspinejournal.org)

Common physiopathology for sensory, motor and limbic positive symptoms. (sonimodul.ch)

Around 69-95% of children with Autistic Spectrum Disorder are known to have sensory processing abnormalities .Tackling these problems would help in better quality of life, both for the pa. (bioportfolio.com)

Probably the oldest sensory system in the nature, the olfactory system concerns the sense of smell. (wikibooks.org)
Similar to other sensory modalities, olfactory information must be transmitted from peripheral olfactory structures, like the olfactory epithelium, to more central structures, meaning the olfactory bulb and cortex. (wikibooks.org)
Due to phylogeny, olfactory sensory activity is transferred directly from the olfactory bulb to the olfactory cortex, without a thalamic relay. (wikibooks.org)

By soft manual palpation of the craniosacral and fascia system sensory, motor, cognitive, and emotional processes can be influenced. (clinicaltrials.gov)
The results suggest that the LRJT is a complex mental task that involves cognitive, sensory, motor, and behavioural processes. (hindawi.com)
To examine potential mechanisms within sensory cortex that may contribute to cognitive functions, here we describe nicotinic actions in primary auditory cortex, where well-characterized neural "filters"-frequency receptive fields-can be exploited to examine nicotinic regulation of cortical processing. (frontiersin.org)
Similar effects across sensory and non-sensory cortical circuits could contribute to nicotinic enhancement of cognitive functions. (frontiersin.org)
The authors explicitly note that no studies were found that measured sensory abilities, and also note that findings of cognitive improvement sometimes were small in magnitude and contradicted by other results. (frontiersin.org)
[27] After sensory information passes through these centers, it is then routed to brain regions responsible for emotions, memory, and higher level cognitive functions. (wikipedia.org)

The influence of hypnotic susceptibility was evaluated by calculating correlation coefficients for threshold changes and hypnotic susceptibility (Harvard group scale). (biomedcentral.com)
No correlation of hypnotic susceptibility and threshold changes were detected. (biomedcentral.com)
Even taking age and other factors into consideration, we found a significant correlation of balance test failures with increasing roll-tilt thresholds. (frontiersin.org)

Threshold measures for contact detection, two-point discrimination and two-point perception were obtained on the chin before and 1, 3 and 6 months and 1 and 2 years after surgery. (elsevier.com)
Sensory discrimination problems , that might manifest themselves in behaviors such as things constantly dropped. (wikipedia.org)
2011. Regionally specific human GABA concentration correlates with tactile discrimination thresholds . (cardiff.ac.uk)

The remaining chapters describe the relationship between sensory characteristics and various physical and chemical properties of foods. (elsevier.com)
Passiflora setacea D.C is a passion fruit species native from Brazilian savannah characterized by naturally sweet sensory characteristics. (bioportfolio.com)

What is the role of butanol threshold test in the diagnosis of taste and smell disorders? (medscape.com)
Goldberg JM, Lindblom U (1979) Standardised method of determining vibratory perception thresholds for diagnosis and screening in neurological investigation. (springer.com)
These findings suggest that CPT testing might contribute to diagnosis of PD, as well as the understanding of sensory processing involving peripheral deafferentation. (kagawa-u.ac.jp)
[22] Dr. Catherine Lord, a leading autism expert and the director of the Center for Autism and the Developing Brain at New York-Presbyterian Hospital, argues that sensory issues are an important concern, but not a diagnosis in themselves. (wikipedia.org)

The purpose of this analysis was to examine the effect of sensory retraining on sensory function after bilateral sagittal split osteotomy (BSSO). (elsevier.com)

We aimed to quantify effects of pregabalin on colonic sensory and motor functions and assess relationships between sensory effects and colonic compliance. (physiology.org)
Complex animal behaviors are built from dynamical relationships between sensory inputs, neuronal activity, and motor outputs in patterns with strategic value. (pnas.org)

The first systematic studies to determine sensory thresholds were conducted by Ernst Heinrich Weber, a physiologist and pioneer of experimental psychology at the Leipzig University. (wikipedia.org)
The stability of the ATS produced by impulse noise and the consistency across the five animals suggest that the phenomenon may be useful in the systematic study of both temporary threshold shift and noise induced permanent threshold shift. (cdc.gov)
The investigators will conduct a systematic study of the sensory perception of a diverse set of commonly used pediatric liquid medications and excipients in tandem with an equally complete. (bioportfolio.com)

Sensory ganglia may also have intrinsic interneurons and non-neuronal supporting cells. (bioportfolio.com)

the heteromultimeric voltage-sensitive calcium (Ca 2 + ) channel is involved in the function of excitable tissues including sensory nerves. (physiology.org)

We chose to measure vestibular thresholds for a variety of reasons. (frontiersin.org)
3) Thresholds have been shown to be a sensitive measure of vestibular function that has been shown to identify specific peripheral vestibular deficits ( 10 ). (frontiersin.org)

Examples are taken from a wide range of sensory modalities in both vertebrates and invertebrates. (biologists.org)

These mechanisms play an important role in adapting the operation of central networks to external demands and thus help optimize sensory-motor integration [ 4 ]. (hindawi.com)
Studying sensory processing means focusing on the rules and mechanisms that the brain uses to make sense of the world. (cardiff.ac.uk)

Since basic cortical circuitry and nAChR distributions are similar across neocortex, these findings may generalize to neural processing in other sensory regions, and to non-sensory regions where afferent inputs are more difficult to manipulate experimentally. (frontiersin.org)

Sensory processing issues represent a feature of a number of disorders, including anxiety problems, ADHD, [14] food intolerances, behavioral disorders, and particularly, autism spectrum disorders . (wikipedia.org)

Anatomy5

Organisms1

Diseases10

Chemicals and Drugs1

Analytical, Diagnostic and Therapeutic Techniques and Equipment8

Psychiatry and Psychology9

Phenomena and Processes13

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture2

Information Science3

Health Care6

Transient and permanent deficits in motion perception after lesions of cortical areas MT and MST in the macaque monkey. (1/3575)

Spinal cord-evoked potentials and muscle responses evoked by transcranial magnetic stimulation in 10 awake human subjects. (2/3575)

Electrophysiological evidence for tetrodotoxin-resistant sodium channels in slowly conducting dural sensory fibers. (3/3575)

Uninjured C-fiber nociceptors develop spontaneous activity and alpha-adrenergic sensitivity following L6 spinal nerve ligation in monkey. (4/3575)

Quantitative structure-activity relationships for nasal pungency thresholds of volatile organic compounds. (5/3575)

Paradoxical heat sensation in healthy subjects: peripherally conducted by A delta or C fibres? (6/3575)

Impairment in preattentive visual processing in patients with Parkinson's disease. (7/3575)

NOS inhibitor antagonism of PGE2-induced mechanical sensitization of cutaneous C-fiber nociceptors in the rat. (8/3575)

Sensory Thresholds

Thermosensing

Sensation

Pain Threshold

Touch

Vibration

Fecal Incontinence

Peripheral Nervous System Diseases

Pressure

Manometry

Pain Measurement

Pain

Hot Temperature

Differential Threshold

Auditory Threshold

Neural Conduction

Median Nerve

Diabetic Neuropathies

Sural Nerve

Ulnar Nerve

Tibial Nerve

Chinchilla

Hearing Loss, Noise-Induced

Noise

Noise, Occupational

Ear Protective Devices

Stainless Steel

Hypoglycemia

Diabetes Mellitus, Type 1

Autonomic Nervous System Diseases

Awareness

Sensitivity and Specificity

Autonomic Nervous System

Expert Systems

Algorithms

Patents as Topic

Telemetry

National Socialism

Magnetic Resonance Imaging

Brain Mapping

Hyperalgesia

Intraoperative Period

Dose-Response Relationship, Drug

Pain, Postoperative

Transient and permanent deficits in motion perception after lesions of cortical areas MT and MST in the macaque monkey. (1/3575)

Spinal cord-evoked potentials and muscle responses evoked by transcranial magnetic stimulation in 10 awake human subjects. (2/3575)

Electrophysiological evidence for tetrodotoxin-resistant sodium channels in slowly conducting dural sensory fibers. (3/3575)

Uninjured C-fiber nociceptors develop spontaneous activity and alpha-adrenergic sensitivity following L6 spinal nerve ligation in monkey. (4/3575)

Quantitative structure-activity relationships for nasal pungency thresholds of volatile organic compounds. (5/3575)

Paradoxical heat sensation in healthy subjects: peripherally conducted by A delta or C fibres? (6/3575)

Impairment in preattentive visual processing in patients with Parkinson's disease. (7/3575)

NOS inhibitor antagonism of PGE2-induced mechanical sensitization of cutaneous C-fiber nociceptors in the rat. (8/3575)

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Detection Threshold for Sonar - Discovery of Sound in the Sea

New Study on Thresholds of Biomechanical Loads due to Collisions Between Robots and Humans

On threshold prediction of low-density parity-check codes with structure | IEEE Conference Publication | IEEE Xplore

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Journal of Vestibular Research - Volume 8, issue 6 - Journals - IOS Press

Interactive Multiple Object Tracking (iMOT)

How to get sensor threshold on BMC-based system with a specific sensor number - Advantech Cloud IoT Service Portal

Presynaptic Spontaneous Activity Enhances the Accuracy of Latency Coding | MIT CogNet

Exertional myocardial ischemia in diabetes: a quantitative analysis of anginal perceptual threshold and the influence of...

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