Cerebral Cortex layers Flashcards

1
Q

layer I is also known as

A

molecular layer

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2
Q

layer II is also known as

A

external granule layer

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3
Q

layer III is also known as

A

external pyramidal layer

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4
Q

layer IV is also known as

A

internal granule layer

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5
Q

layer V is also known as

A

internal pyramidal layer

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6
Q

layer VI is also known as

A

multiform layer

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7
Q

layer I contains

A

mostly axons

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8
Q

layer II contains

A

granule (stellate) cells

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9
Q

layer III contains

A

primary pyramidal cells

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10
Q

layer IV contains

A

main granular cell layer

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11
Q

layer V contains

A

dominated by giant pyramidal cells

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12
Q

layer VI contains

A

all types of cells: pyramidal, stellate, fusiform

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13
Q

three major cells types

A

pyramidal cells, granule cells and fusiform cells

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14
Q

pyramidal cells function

A

source of corticospinal projections. major efferent cell

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15
Q

granule cells function

A

short axons - function as interneurons (intra cortical processing)

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16
Q

excitatory granule cells release

A

glutamate

17
Q

inhibitory granule cells release

A

GABA

18
Q

fusiform cells function

A

least numerous. give rise to output fibers from cortex

19
Q

most output leaves cortex via

A

V and VI

20
Q

spinal cord tracts originate from layer

A

V

21
Q

thalamic connections from layer

A

VI

22
Q

most incoming sensory signals terminate in layer

A

IV

23
Q

most intracortical association functions in layers…

A

I, II, III

24
Q

large number of neurons in

A

II, III - short horizontal connections with adjacent cortical areas