(1) Cholinergic muscarinic receptor binding and acetylcholinesterase (AChE) histochemistry were studied in the barrel cortex of adult, vibrissae deprived and vibrissae denervated mice.
(2) Fifty percent of the stained neurons were vibrissa sensitive.
(3) The specific cortical vibrissa area is somatotopically organized; 39% of the cortical units in that area responded to stimulation of only a single sinus hair but in some cases all maxillary vibrissae activated a single cortical neurone.
(4) Peripheral processes of dorsomedially situated ganglion cells course dorsally toward the presumptive vibrissa field, and those of ventrolaterally situated ganglion cells project ventrally.
(5) Movements of RF-vibrissae produced a burst of multiple discharges in S-TR neurons and single spike discharges followed by a prominent suppression of spontaneous discharges in VB neurons.
(6) The PSA frequency varied in relation to the difference between fast and slow vibrissa tremor, as reported previously.
(7) Responses of neurones to either physiological stimulation of hair and vibrissa follicle sensory afferents and to ionophoretically applied excitatory amino acids were challenged with the antagonists D-2-amino-5-phosphonovalerate (APV), kynurenate and gamma-D-glutamylaminomethyl sulphonate (GAMS).
(8) The following structures of the host brain were stimulated: ventrobasal complex and posterior thalamic nuclei, ipsilateral area of vibrissae representation in the sensorimotor cortex and contralateral barrel field.
(9) The vibrissae of rex are curved or bent and may break off; those of waved are a mixture of straight, curved, and bent hairs.
(10) These patterns of metabolic activity underscore the vertical and horizontal organization of the SmI vibrissa cortex and suggest that neurons located within the central core of a column have functional properties distinct from those located in zones where individual columns interface.
(11) The normal cytoarchitectonic pattern of barrels in layer IV of mouse SmI face cortex is altered by early damage to the mystacial vibrissae (Van der Loos and Woolsey, '73).
(12) In most cases, each of the response reflexes was found to be associated with several genes (locomotion, hind limb, crossed extensor, righting, vibrissae placing, bar holding).
(13) All but one of the recovered cells were responsive to deflection of any one of a number (4-19) of vibrissae.
(14) The arrangement of barreloids showed a distinct orderlines similar to that of facial vibrissae on a horizontal section.
(15) The paper deals with the contribution of intracortical inhibitory processes to the organization of receptive fields in the vibrissae projection area of the somatosensory cortex.
(16) The connective tissues are organized into capsular and extracapsular systems that serve to stabilize the vibrissae and return them to initial rest positions.
(17) The oculomotor effects of vibrissae stimulation have been studied in the "encéphale isolé" non-anaesthetized Cat.
(18) Immediately after nerve crushing, the latency of the initial positive potential evoked at contralateral scalp sites by stimulating the vibrissae of the nerve-crushed side was increased.
(19) Injections of isotope in the two other foci of vibrissa-evoked activity usually recorded in each brain were invariably found to label a part of area 3b of the first somatosensory area (SI) in the case of the more anterior focus.
(20) Deprivation of vibrissae affected the performance of the control cats only in darkness and had no effect on the blind cats.
Whisker
Definition:
(n.) One who, or that which, whisks, or moves with a quick, sweeping motion.
(n.) Formerly, the hair of the upper lip; a mustache; -- usually in the plural.
(n.) That part of the beard which grows upon the sides of the face, or upon the chin, or upon both; as, side whiskers; chin whiskers.
(n.) A hair of the beard.
(n.) One of the long, projecting hairs growing at the sides of the mouth of a cat, or other animal.
(n.) Iron rods extending on either side of the bowsprit, to spread, or guy out, the stays, etc.
Example Sentences:
(1) Writing in the journal Nature , the researchers describe how our ancestors lost another piece of DNA that gives rise to both facial whiskers and sensitive spines on the tip of the penis, both of which are found in chimpanzees and other non-human primates.
(2) They also suggest that both the migration of cortical neurons on glia and the refinement of the mapping between the peripheral whisker field and its cortical representation may depend upon the distribution of substrate adhesion molecules.
(3) The figures on Tuesday mean Osborne has, by a whisker, achieved his promise that his austerity measures would bring year-on-year cuts in the UK's annual deficit.
(4) Facebook Twitter Pinterest Bernie Sanders: I want to see major changes in the Democratic party But Clinton is still a comfortable favourite in polling at the national level and her team argued earlier that day that if she can shrink his lead to single digits in the New Hampshire primary on Tuesday, she will have blunted the surprise momentum that unnerved supporters when he came within a whisker of beating her in Iowa.
(5) Follicles and whisker pads cultured with minoxidil, then washed for one h in media were devoid of minoxidil-immunoreactivity.
(6) In the present experiments we manipulated the tactile experience of young rats by depriving them of the sensory information that is normally provided by their large facial whiskers.
(7) In addition to the well-documented role of intracortical connectivity in elaboration of multi-whisker receptor fields in the cortical neurones, the role played by direct inputs from multi-whisker thalamic ventrobasal neurones was discussed.
(8) The whisker-to-barrel pathway of the adult mouse was used in a study on the effects of peripheral sensory deprivation on GAD-immunoreactivity in the somatosensory cortex.
(9) Condition b was investigated by calculating the mean and the variance of the time required for the diffusion of a molecule (the proximal tip of the fiber) on a spherical surface (whose radius is the distance from the tip to the whisker tethering point) into a circular sink (the baseplate site).
(10) A normally transient cross-modal thalamocortical projection from the magnocellular subdivision of the medial geniculate nucleus (MGm) to the primary somatosensory (SI) cortex of rats was found to remain unchanged throughout adulthood following unilateral removal of whiskers in newborn animals.
(11) Following displacement of an adjacent whisker, unit discharges to subsequent deflections of the maximally excitatory whisker were reduced in a time-dependent fashion.
(12) Whiskers contacted the discriminanda along the hair shaft, not at the whisker tips.
(13) On the other hand, none of the upper one-half or two-thirds implants regenerated a dermal papilla, and no whisker production was observed.
(14) Indeed, the present findings suggest that the representation of the whiskers in SII may have a specialized function paralleling that in SI.
(15) Of 134 neurons that were noted as either sustained or transient based on the response to a maintained whisker deflection, 50 were sustained-type neurons and 84 were transient-type neurons.
(16) Democrats also won the battle for lieutenant governor and were within a whisker of securing the post of attorney general – an unprecedented sweep in a state that until recently was a Republican stronghold.
(17) We found that normal barrel fields and abnormal barrel fields caused by supernumerary whiskers or lesions to the whisker pad are closely approximated by this mathematical formalism.
(18) The deprived barrel cortices, examined in adults, showed drastically diminished intracortical projections relative to normal controls, although the map of the whiskers in the cortex was unchanged.
(19) These data indicate that PA and CA antisera identify two cell populations in whisker-related regions of the V brainstem complex and that PA cells are somatotopically patterned in PrV, SpI, and SpC.
(20) To study minoxidil's action on isolated follicles we developed and validated an organ culture system using mouse whisker follicles.