Central Processing Flashcards

1
Q

what is binocularity

A

some ganglion cells project to the same side, some to opposite sides

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2
Q

what is the LGN

A

thalamic nucleus through which visual information is routed to the visual cortex

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3
Q

what is anatomy of the LGN

A
ladder structure with 6 layers
largest cells (m cells) in layers 1 and 2
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4
Q

describe projection in LGN

A

visual info from the two visual fields is kept separate

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5
Q

what is ipsilateral and contralateral projection

A

in right LGN, right eye axons synapse on LGN layers 2,3,5

left eye axons synapse on layers 1,4,6

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6
Q

what is the retinotopic map of visual cortex

A

retina
LGN
striate cortex (layer IVC)

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7
Q

where do signals coming from LGN project to

A

visual cortex V1(area 17/striate cortex)

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8
Q

what are two cell types of LGN

A
stelate cells (very small, not proper axons, in layer C4)
pyramidial cells (structure that radiate through cortex, only cells with axons that exit cortex)
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9
Q

what are three parallel processing channels

A

m channel
p-ib channel
blob channel

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10
Q

what is m channel

A

magnocellular
analyses object motion
simple cells that are orientation sensitive

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11
Q

what are P-Ib channel

A

parvocellular interblob
layer 3 analyses object shape
receive binocular inputs

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12
Q

what are blob cells

A

parvo and koniocellular
object colour
wavelength sensitive

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