Lecture 2 - Forebrain: Cerebral Cortex

Question 1

Fibre types and function>?

Answer 1

Association - connections of same hemisphere; commisural - connections of different hemispheres; projection fibres - connections from brain to spine

Question 2

Neo cortex?

Answer 2

Surrounding outer area of brain with 6 layers

Question 3

Allocortex compositions?

Answer 3

hippocampus, olfactory inputs and limbic system activation

Question 4

Layers of neocortex I->VI?

Answer 4

molecular, ext. granular (sensory input), ext. pyramidal (info to other cortical areas), int. granular (input from periphery), int. pyramidal (motor neurons, ‘pyramidal tract’), multiform

Question 5

Homotypical cerebral cortex?

Answer 5

even mixture of layers II->V, found in association cortices (prefrontal, parietal association, temporal)

Question 6

Heterotypical cerebral cortex: agranular?

Answer 6

pyramidal cells predominate (III & V, less II and IV) e.g. pre central gyrus

Question 7

Heterotypical cerebral cortex: granular?

Answer 7

granule cells predominate (II and IV, less III & V) e.g. primary sensory cortices (somatosensory, visual, auditory)

Question 8

Genu?

Answer 8

the deep aspect of the internal capsule representing the face homonculus for motor interpretation, with the rest of the body progressing superficially long the internal capsule

Question 9

Internal capsule functions?

Answer 9

seperates lens from caudate nucleus, also connects subcortical structures to cortical structures