Cerebral cortex - divisions

Question 1

Cerebral cortex

Answer 1

Forms the outer surface of the cerebral hemisphere. All cell bodies form in cortex.

Question 2

Cortex is convoluted by grooves called…

Answer 2

Sulci (small )/ Fissures (large)

- Allow for 3x greater surface area. 2/3 of cortex is in sulci

Question 3

Bulges in cortex are termed, what?

Answer 3

Gyri or gyrus

Question 4

What is the cortex composed of and what color appearance?

Answer 4

Composed of cells (largely unmyelinated), looks gray. Formed from 6 layers of cells

Question 5

Cortex is divided into

Answer 5

4 lobes: frontal, parietal, occipital, and temporal

Question 6

Why are pathways white?

Answer 6

Because the axons are covered with myelin

Question 7

Central fissure divides

Answer 7

the frontal from parietal lobe (pre/postcentral gyrus) and motor/ sensory cortex

Question 8

Lateral fissure divides

Answer 8

temporal and frontal lobe

Question 9

minor sulci define

Answer 9

the occipital lobe

Question 10

Longitudinal fissure divides

Answer 10

the left and right hemispheres