Thalamo-cortical relationships and rhythmic activity Flashcards
(24 cards)
What is the relationship b/t the thalamus and the cerebral cortex
it’s involved in a continuous conversation with the cerebral cortex by way of extensive reciprocal connections
In addition to the filtering function of the thalamus, what are the three other involvements does it have
processing memory
language
extrapyramidal information
Name the four major functional types of thalamic nuclei
S.A.N.S
Speicific Relay
Association
Non-specific
Subcortical
What does the specific relay nuclei receive
well-defined inputs and project to discrete areas of the cortex
ie. VPL received input from ML and STT and projects to SSI cortex
What does the association nuclei received
input from broad cortical areas and project to broad areas of cortex
ie. Pulvinar nucleus
What does the non-specific nuclei receive
input from cortical and subcortical sources
ie. intralaminar nuclei
What does the subcortical nuclei receive
receives input from thalamic nucli and then projects back to the thalmaus
What is an example of subcortical nuclei
reticular nucleus
*Does not directly project to the cortex, important in sleep
Name the two major anatomic groups of thalamic nuclei
The lateral group
The medical group
The lateral group consists of all nuclei ——– to the internal medullary lamina
lateral
The lateral group consists of what two tier of nuclei
ventral tier
dorsal tier
The ventral tier of the lateral group consists of what six divisions
LGN MGN VPL VPM VL VA
The dorsal tier of the lateral group consists of what three divisions
Pulvinar
LP
LD
The medial group is ——— to the internal medullary lamina
medial
What group of nuclei reside in the medial group
M dorsal nucleus
What layer of the cerebral cortex does the thalamus project to
layer 4
What layer of the cerebral cortex projects back to the thalamus
layer 6
The ventral anterior nucleus of the ventral tier group receives projectsion from ———- and projects to widespread areas of the ——–
caudate nucleus
frontal lobe
The VA is related to non classic functions of the
basal ganglia such as emotion and cognition
The doral tier has two-way connections with
parietal-occipital-temporal “association cortex”
What are the important functions that the association cortex of the P-O-T is involved in
higher sensory and gnostic function
- involved in selection of cortical rhythms that are correlated with different stages of sleep-wakefulness
The medial dorsal nucleus of the medical group of nuclei is related to
cortical and subcortical zones which are involved in affect, mood, and emotion
The centromedian nucleus of the intralaminar nucleus is related to
basal ganglia
What is unusual about the reticular nucleus
it recieves its majar input from other thalamic nuclei and DOES NOT project to the cerebral cortex
*its output is GABAergic and projects back to thalamus to influence rhythmic activity of thalamortical cells
