Thalamus Flashcards
What arteries supplies the thalamus?
PCA and anterior choroidal artery
What structure is located inside the epithalamus?
Pineal Gland
What is the function of the pineal gland?
Melatonin, circadian rhythm, possible seasonal or hormonal regulation
What other structure is in the epithalamus that has multiple connections that may influence circadian rhythm, inhibition of excess movement via basal gang, social and cognitive fxns?
Habenular nuclei
Where is the subthalamus located?
Posterior and inferior to thalamic bodies, part of basal gang loops
What is included in the hypothalamus?
Midline nuclei
Mammillary bodes
Infundibular stalk
Posterior lobe of pituitary gland
What is the function of the thalamus?
Selective filter for the cx, directs attn to impt info by regulating flow of info to cx
*REGULATES ACTIVITY LVL OF CX
Relay station/processing/integration
-all sensory except olfaction
-motor inputs from cerebellum and BG
-projection fibers travel thru internal capsule
-limit inputs
OTHER:
-widespread modulators inputs (reg consciousness, arousal, attn and sleep wake cycle)
-some emotional and memory info processing
The thalamus (and all of the other thalami) is from what earlier part of the brain?
Diencephalon and prosencephalon
What is the y shaped white matter called?
Internal medullary lamina
What does the internal medullary lamina divide into?
Anterior, medial and lateral group of nuuuclei
Where is the intralaminar nuclei located?
Internal medullary lamina
What ventricle is the midline thalamic nuclei located in?
3rd
Thalamic reticular nucleus is where?
Lateral aspect of thalamus
What are the three main functional groups of the thalamus?
Relay, intralaminar, reticular
What kind of input does the relay nuclei receive?
Sensory (not olfactory), cerebellar input, basal gang, and limbic.
Integrates and process this info- FILTERS.
