Laminar Structure

Question 1

How are layers of cerebral cortex defined?

Answer 1

by cell types, connections, and quantity of cells in each layer

Question 2

Name the 6 layers of cerebral cortex (I-VI)

Answer 2

I. Molecular layer 
II. External granular layer 
III. External pyramidal layer 
IV. Internal granular layer 
V. Internal pyramidal layer 
VI. Polymorphic layer

Question 3

How are the cortical regions of cerebral cortex different from each other?

Answer 3

Based on the architectonic organization. Different architectonic patterns are associated with different functional organizations.

Question 4

How do the individual layers of cerebral cortex differ?

Answer 4

Based on cell types and how they interconnect within the layers and to other brain regions

Question 5

classes of pyramidal neurons (3)

Answer 5

corticocortical association neurons
callosal neurons
descending projection neurons

Question 6

corticocortical association neurons (location, projection)

Answer 6

layers II and III, ipsilateral cortex

Question 7

callosal neurons (location, projection)

Answer 7

layers II and III, contralateral cortex via corpus callosum

Question 8

descending projection neurons (location, projection)

Answer 8

layer V, striatum, brain stem, spinal cord; layer VI, thalamus