4.25 Cerebrum 3

Question 1

What are the subcortical structures of the cerebral hemispheres?

Answer 1

• subcortical white matter

- BG

Question 2

What are the cortical structures of the cerebral hemispheres?

Answer 2

• cerebral cortex

- hippocampus/amygdala

Question 3

subcortical white matter: 3 fiber types

Answer 3

• projection fibers
• commissural fibers
• association fibers

Question 4

projection fibers travel through

Answer 4

internal capsule

Question 5

projection fibers: axons spread out to form the

Answer 5

corona radiata

Question 6

internal capsule

Answer 6

how the cerebrum connects to everything else

Question 7

3 parts of the internal capsule

Answer 7

• anterior limb
• posterior limb
• genu

Question 8

internal capsule: anterior limb consists of

Answer 8

• corticopontine
• thalamolimbic
• corticolimbic

Question 9

internal capsule: posterior limb consists of

Answer 9

• corticospinal

- some thalamocortical

Question 10

internal capsule: genu consists of

Answer 10

fibers to CN nuclei and RF

Question 11

What do commissural fibers connect?

Answer 11

• hemispheres

- homologous structures between hemispheres (ex thalamus ⬌ thalamus)

Question 12

What is the major commisure?

Answer 12

corpus callosum

Question 13

What do association fibers connect?

Answer 13

individual regions within one hemisphere

Question 14

function of the BG

Answer 14

regulate, sequence, modulate movements via direct/indirect pathways

Question 15

What does the BG affect? (overall functions)

Answer 15

• executive function
• motivation
• decision making
• behavior

Question 16

ventral striatum is a part of the

Answer 16

BG

Question 17

What does the ventral striatum do?

Answer 17

• links motivation with behavior

- reward center