7.5.2 Thalamus and Forebrain Flashcards
What is the role of the reticular nucleus?
What are the general functions and cortical targets of the pulvinar nucleus and the intralaminar nuclei?
Which fibers are contained in the internal capsule?
What acts as the last synaptic relay station in ascending pathways before they reach the cerebral cortex?
Thalamus
“Gateway to the cerebral cortex”
What part of the thalamus is damaged in Korsokoff’s syndrome? What are the two main symptoms?
Mediodorsl nucleus and the mammillary bodies
Anterograde amnesia and Confabulation
What are the sensory system nuclei of the thalamus? (5)
Lateral geniculate nucleus (primary visual pathway)
Medial geniculate nucleus (primary auditory pathway)
VPL (body) and VPM (head) (primary somatosensory pathway)
VPMpc (primary gustatory pathway)
Medial dorsal (primary olfactory pathway)
What separates the thalamic nuclei into groups?
Internal medullary lamina
Occlusion of which artery will lead to thalamic pain?
Thalamogeniculate artery
What is the feedforward model for motor control by the cerebellum?
What is the multisensory nucleus of the thalamus?
Pulvinar - receives input from superior colliculus, other sensory regions; output to parieto-occipital cortex
What are the limbic system nuclei of the thalamus? (2)
Medial Dorsal – part of the “drive” pathway between the amygdala, nucleus acumbens and orbitofrontal cortex
Anterior nucleus – part of the Papez memory circuit
What are the motor system nuclei of the thalamus? (2)
VL – relays basal ganglia and cerebellar info to motor and premotor cortex feed forward system to smooth out movements
VA – relays basal ganglia info widespread areas of frontal cortex - projects to the frontal eye fields and premotor cortex
