pulvinar


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Related to pulvinar: pulvinar sign

pulvinar

 [pul-vi´nar]
the prominent, cushionlike mass of nuclei that forms the medial portion of the posterior extremity of the thalamus, which partly overhangs the rostral colliculus and its brachium and is separated inferiorly from the geniculate body by the brachium of the rostral colliculus; it receives fibers from other thalamic nuclei and gives off widespread cortical projections.

pul·vi·nar

(pŭl-vī'năr),
The expanded caudal extremity of the thalamus that forms a cushionlike prominence overlying the geniculate bodies. This structure, collectively called nuclei pulvinares [TA] (pulvinar nuclei [TA]), is a composite cell group made up of anterior, inferior, lateral, and medial nuclei.
[L. a couch made from cushions, fr. pulvinus, cushion]

pulvinar

/pul·vi·nar/ (pul-vi´nar) the prominent medial part of the posterior end of the thalamus.

pul·vi·nar

(pŭl'vī-năr) [TA]
The expanded posterior extremity of the thalamus that forms a cushionlike prominence overlying the geniculate bodies.
[L. a couch made from cushions, fr. pulvinus, cushion]

pulvinar 

The prominence of the posterior portion of the thalamus overlapping the superior colliculus. It receives projections from the auditory, somatosensory and visual cortex regions. It is involved in visual attention, suppression of irrelevant stimuli and utilizing information to initiate eye movements.

pulvinar

the posterior medial part of the posterior end of the thalamus.
References in periodicals archive ?
The only positive finding of diagnostic value in vCJD from these tests is the pulvinar sign on MRI, which is not entirely specific for vCJD and can be absent in up to 9% of cases, even after multiple MRIs (14).
Fluency deficits and comprehension defects reflect the thalamo-frontal disconnection caused by pulvinar and paramedian nuclei pathologies (29).
Like a switchboard operator, the pulvinar makes sure that separate areas of the visual cortex - which processes visual information - are communicating about the same external information, lead author of the study Yuri Saalmann, said.
Our study suggests that a mysterious area in the center of the brain called the pulvinar acts as a switchboard operator between areas on the brain's surface known as the visual cortex, which processes visual information.
28) proposed a role for the pulvinar in the recognition of fearful expression.
2]-weighted signal in the pulvinar region of the thalamus (Figure 4).
World Health Organization Diagnostic Criteria for New Variant Creutzfeldt-Jakob Disease Patients must have five of the following six symptoms: * Early psychiatric symptoms * Early persistent paresthesia/dysthesia * Ataxia * Chorea/dystonia or myoclonus * Dementia * Akinetic mutism Patients should meet all the following criteria: * Clinical duration of symptoms >6 months * Age at onset of <50 years * Absences of PrP gene mutation * Electroencephalogram does not show typical periodic appearance * Routine investigations do not suggest an alternative diagnosis * MRI scan shows abnormal bilateral high signal from the pulvinar on axial T-2 and/or proton density weighted images Note: From "Clinical Importance of Bovine Spongiform Encephalopathy, "by C.
According to their conceptualization, the pulvinar is believed to be the primary mediator of language functions.
Researchers believe that part, the pulvinar region, helps humans integrate the disparate bits of information coming in from the senses.
Pulvinar sign (30), cortical ribboning (31), or other findings suggestive of human prion disease have not been identified.
12,13) Structure Affects of AD Eye Lens [beta]-amyloid is present in lens fibres Aqueous Humour [beta]-amyloid is present Optic Nerve Nerve degeneration Retina Ganglion cell loss [beta]-amyloid deposition Reduction in thickness of RNFL Sub-cortical Visual Centres Lateral [beta]-amyloid plaques Geniculate Nucleus (LGN) Pulvinar [beta]-amyloid plaques Superior [beta]-amyloid plaques Colliculus & Neurofibrillary Tangles (NFT)