Cortical columns

Question 1

Where do all 5 of the single source divergent networks sen axonal projections?

Answer 1

to the cerebrum

Question 2

What are the cortical columns?

Answer 2

Functional units comprised of groups of neurons that work together to process information
- consists of interactive layers withins the cerebral cortex

Question 3

Are the large groups of neurons able to perform more complex or simple operations compared to a single neuron?

Answer 3

more complex

Question 4

A single cortical column contains an average of how many neurons?

Answer 4

~100 neurons (may contain up to 140)

Question 5

How many layers do each cortical column contain?

Answer 5

6 distinct layers according to the inputs and outputs of that layer

Question 6

What do you call linked together columns?

Answer 6

modules

Question 7

Do neurons within a column have similar responses to stimuli?

Answer 7

yes, they have similar receptive fields

Question 8

What type of layers are I-III?

Answer 8

Supragranular layers

Question 9

Which layers are closest to the cortical surface?

Answer 9

I-III

Question 10

What do layers I-III do?

Answer 10

send reciprocal projections to other cortical columns

Question 11

Are layers I-III similar to V-VI?

Answer 11

No, they have functionally distinct differences

Question 12

Which layer divides the layers into supragranular and infragranular?

Answer 12

Layer IV

Question 13

What does the IV layer of the cortical columns do?

Answer 13

Receives input from the thalamus and sends input to other layers within the cortical columns

Question 14

Which layers of the cortical column are referred to as infragranular layers?

Answer 14

Layers V-VI

Question 15

Where do the infragranular layer receive input from?

Answer 15

from supragranular layers of adjacent columns

Question 16

Do infragranular layers send projections back to adjacent columns?

Answer 16

No

Question 17

Where do infragranular layers project?

Answer 17

to extracortical areas including the thalamus and motor sensory regions

Question 18

What does the Thalamus do in regards to cortical columns?

Answer 18

Thalamus works with the cerebral cortex to create a “feedback circuit”

Question 19

What is the order of transmission from the thalamus to the columns?

Answer 19

infragranular layers –> thalamus –> layer IV

Question 20

Information flow within the cerebral cortex is mediated by the action of what?

Answer 20

Supragranular neuronal layers

Question 21

Additional information from the internal and external environment is integrated by what two structures?

Answer 21

Thalamus and the IV cortical layer