Cerebral cortex 2

Question 1

what is the order?

Polymorphic layer 
Internal granule layer 
Molecular layer 
Internal pyramidal layer 
External pyramidal layer 
External granule layer

Answer 1

Molecular layer (I)

External granule layer (II)

External pyramidal layer (III)

Internal granule layer (IV)

Internal pyramidal layer (V)

Polymorphic layer (VI)

Question 2

laminar structure of the cortex is uniform

Answer 2

NOTTTTTTTT

Question 3

agranular cortex is dominated by

Answer 3

large pyramidal cells

Question 4

granular cortex is dominated by

Answer 4

small cells

Question 5

does the cortex integrates all sensory modalities?

Answer 5

YASSSSSS

Question 6

cortex controls itself?

Answer 6

yes, it modulates its own activity and focus via the control of attention

Question 7

input into cortex:

• Thalamic sensory and relay nuclei →
• Input from intrathalamic nuclei →
• Intracortical input →

Answer 7

• Thalamic sensory and relay nuclei → layer IV (internal granule layer)
• Input from intrathalamic nuclei → layer VI (polymorphic layers)
• Intracortical input → layers II/III (external granule and pyramidal layers)

Question 8

output from cortex:

• Layer III neurons →
• Layer V →
• Layer VI →

Answer 8

• Layer III neurons → other cortical areas
• Layer V → striatum, brainstem, and spinal cord
• Layer VI → thalamus

Question 9

stay within the same hemisphere

Answer 9

association fibers

Question 10

project from one hemisphere to the other

Answer 10

commissural fibers

Question 11

massive intra-cortical white matter tract containing 200-250 millions axons

Answer 11

corpus callosum

Question 12

connects the temporal lobes, about 1/10th the size of the corpus collosum

Answer 12

anterior commissure

Question 13

cortex:

Superior longitudinal fasciculus – ________

Contains the __________ which connects brain regions involved in the generation and comprehension of language

Answer 13

Superior longitudinal fasciculus – connects frontal with posterior

Contains the Arcuate fasciculus which connects brain regions involved in the generation and comprehension of language

Question 14

forms nearly a complete circle from cingulate to para hippocampal gyrus

Answer 14

Cingulum

Question 15

connects the amygdala with the thalamus, hypothalamus, basal forebrain, brain stem, septal nuclei, and nucleus accumbens

Answer 15

Amygdalofugal pathway

Question 16

Cortical columns are

Answer 16

microcircuits

Question 17

Cortical columns process sensory input

Answer 17

topographically

Question 18

Columnar microcircuits work together to engender

Answer 18

cellular behavior

Question 19

what is activated during facial recognition

Answer 19

fusiform gyrus

Question 20

disruption of higher circuits in cortex altera function

Answer 20

prosopagnosia