Diencephalon: Structure and Function Flashcards
major subdivisions of diencephalon
dorsal thalamus, hypothalamus, epithalamus, ventral thalamus, subthalamus
epithalamus
habenular nuclear complex, pineal gland, posterior commisure
dorsal thalamus
thalamic nuclei, external medullary lamina, internal medullary lamina
ventral thalamus
reticular nucleus of thalamus, ventral lateral geniculate nucleus
subthalamus
zona incerta, subthalamic nucleus
hypothalamus
hypothalamic nuclei, infundibulum, hypophysis (pituitary gland), hypophyseal portal system
anterior nuclear group
afferent: mammilary body; efferent: cingulate gyrus; functions: limbic
lateral ventral tier
VA; VL; VPL; VPM; LGN; MGN
ventral anterior (VA)
afferent: globus pallidus; efferent: area 6 (premotor); functions: motor
ventral lateral (VL)
afferent: dentate nucleus; efferent: areas 4&6; function: motor
VPL
afferent: DC/ML & STT; efferent: areas 3,1,2; function: SS (body)
VPM
afferent: trigeminal nucleus; efferent: area 3,1,2; function: SS (face)
LGN
afferent: retina; efferent: area 17; function: vision
MGN
afferent: inferior colliculus; efferent: areas 41, 42; function: audition
Lateral-dorsal tier
LD, LP, pulvinar
lateral dorsal (LD)
afferent: cingulate gyrus; efferent: cingulate gyrus; functions: emotional experience
lateral posterior (LP)
afferent: parietal cortex; efferent: parietal cortex; function: sensory integration
pulvinar
afferent: superior colliculus, parietooccipitotemporal cortex; efferent: POT cortex; functions: sensory integration
medial group (MD)
afferent: amygdala, olfactory, hypothalamus; efferent: prefrontal cortex; functions: limbic
midline nuclei
afferent: reticular formation & hypothalamus; efferent: basal forebrain; functions: limbic
intralaminar nuclei
centro-medial, centro-lateral & parafascicularis
CM, CL, PF
afferent: reticular formation, STT, globus pallidus & cortical areas; efferent: basal ganglia, cortex areas; functions: pain, sleep & wakefulness
reticular nucleus
afferent: cortex, thalamus, brain stem RF; efferent: thalamic nuclei; functions: modulation of thalamic activity (alert/attention)