Karius- Special Senses: Vision Flashcards

1
Q

What are bipolar ON-center cells during in light?

A

Depolarized in center
Hyperpolarized in off part

Misc - these are metabotropic R, NT release = decreased cation influx

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2
Q

What are bipolar OFF-center cells during light?

A

Center is hyperpolarized
Outside is depolarized

Misc - AMPA R

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3
Q

ON-center tells us what?

A

Where something is

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4
Q

OFF-center tells us what?

A

Where something ends

Edges

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5
Q

First place for AP in eye?

A

Ganglion cells

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6
Q

Vertical pathway for rods

A

Important in low light

Many rods converge on ON-center bipolar cell

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7
Q

Vertical pathway rod synapses on

And what is pathway after that?

A

A 11 amacrine cell

–> ON-center bipolar –> ganglion cell –> optic n –> optic chiasm –> lateral geniculate body

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8
Q

What gets rid of distortion?

A

Amacrine and horizontal cells

–inhibitory signals

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9
Q

Functions of the lateral geniculate body?

A

Control eyes as they converge

Identify major elements and motion

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10
Q

What is primary visual cortex responsible for?

A

V1 - first place - edges and contours

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11
Q

What is V2 important for?

A

Identify disparities in visual image of 2 eyes

Depth perception

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12
Q

Close your eyes, take a deep breath and see yourself submitting your test tomorrow. See yourself getting an A. Know that you are a smart, fantastic future doctor.

A

Seriously. We’ve got this.

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13
Q

What are blobs for?

A

Color detection, begin processing

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14
Q

What is V4 important for?

A

Color processing

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15
Q

2 pathways for higher visual processing?

A

Dorsal - enables us to act on what we are seeing

Ventral - name and copy an image

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