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Thlamic Nuclei
neuro
37
Biology
Graduate
04/17/2011

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Term
What happens when pulvinar has a lesion?
Definition
affect language, visual perception, pain perception
Term
input of pulvinar
Definition
retina, superior colliculus, STT (indirectly)
Term
output out pulvinar
Definition
reciprocal connections with 2nd order sensory, multimodal association cortices (parietal, temporal, occipital, frontal, cingulated)
Term
6-layered nucleus that receives visual input from retina
Definition
lateral geniculate nucleus
Term
input of LGN
Definition

1. optice nerve/tract: ipsilateral temporal, contralateral nasal eye fields

2. nasal input: ends in layers 1,4,5

3. temporal input ends in layers:2,3,5

Term
output of LGB
Definition
reciprocal connections with primary visual area on the banks of the calcarine fissure (cuneaus, lingual gyrus)
Term
receives auditory input with a contralateral dominance
Definition
MGN
Term
input to MGN
Definition
inferior quadrigeminal brachium from inferior colliculus
Term
output of MGN
Definition
reciprocal connections with auditory cortex (Heschl's gyrus) of the temporal lobe
Term
receives touch, pain, temperature, pressure, proprioception, from THE FACE
Definition
VPM
Term
input VPM
Definition
trigeminal leminscus
Term
output of VPM
Definition
reciprocal connections to post-central gyrus, face region
Term
receives touch, pain, temperature, pressure proprioception from THE FACE
Definition
ventral posteromedial (VPM)
Term
input of VPM
Definition
trigeminal lemniscus
Term
output of VPM
Definition
reciprocal connections to post-central gyrus, FACE REGION
Term
medial, small celled region of this nucleus receives pontine and mesencephalic taste relays
Definition
VPM-parvocellular portion
Term
input of VPMpc
Definition
nucleus of the solitary tract
Term
output of VPMpc
Definition
reciprocal connections with anterior insuls
Term
receives touch, pain, temp, pressure proprioception information from the trunk and limbs
Definition
VPL
Term
input of VPL
Definition
STT, ML, dorsal columns
Term
output of VPL
Definition
reciporcal connections with the post-central gyrus, NON-FACE REGIONS, (small,medial portion relays visceral sensation to INSULA-emotional aspects of pain)
Term
transmite vestibular information to the inferior parietal lobule
Definition
VPi
Term
receives segregated UNCROSSED inhibitory input from the BG
Definition
VA (ventral anterior)
Term
input of the VA-medial and lateral
Definition

medial VA: SN

lateral VA: GP

Term
output of VA-medial and lateral
Definition

medial: reciprocal connections with premotor cortex, frontal eye fields, cingulated and parietal cortex

lateral: connections with trunk, limb regions of premotor cortex

Term
receives CROSSED input from deep cerebellar nuclei
Definition
VL
Term
input of VL
Definition
dento-rubo-thalamic pathway
Term
output of VL
Definition
receiprocally connected with primary motor cortex and premotor, parietal, and superior temporal cortices
Term

no direct sensory inputs; inputs from other thalamic nuclei

lesions: associated with apathy, memory changes, difficulty switching tasks

Definition
medialdorsal nucleus
Term
output of Medial Dorsal nucleus
Definition
reciprocal connections with frontal, orbital cortices
Term

receives input from parahippocampal region and mammillary bodies, cholinergic input from midbrain

lesion: degeneration of anterior group and mammilary bodies seen in korsakoff syndrome

Definition
anterior group
Term
input of anterior group
Definition
fornix, MTT
Term
output of Anterior group
Definition
reciprocal connection with cingulate gyrus
Term
receive input from parahippocampal region
Definition
laterodorsal nuclei
Term
input of laterodorsal nucleus
Definition
fornix
Term
output of laterodorsal nuclei
Definition
reciprocal connections with retrosplenial cortex in isthmus region
Term
project diffusely to cortex and striatum, involved in general cortical arousal
Definition
midline nuclei
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