6: Central Vision Flashcards by Nina Dabic | Brainscape

Q

What is the Effect of a Dark Surround in an On-Center RGC?

A

When the Surround is in the Dark…

Surround cones depolarize
Surround cones release gluta onto horizontal cells
Horizontal cells depolarize
Horizontal cells release GABA onto the center cone
Center cone hyperpolarizes even more
-Similar to if it had gotten more light!

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Explain Layer 1 of V1.

A

Lots of synapses
No cell bodies
No specialized identifiable function
Lots of collaterals
Pyramidal cell dendrites

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Explain Layer 2/ 3 of V1.

A

-Send/ receives axons to/ from other cortical areas (including opposite hemispheres)

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Explain Layer 4 of V1.

A

Main input layer where thalamic axons terminate/ synapse
-Receives thal axons
-Highest density of stellate neurons

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Explain Layer 5 of V1.

A

Syn on neurs in spin cord which sends musc sigs/ neurons that cause movement
Sends axons to brainstem & spinal cord

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Explain Layer 6 of V1

A

-Efferent axons to thal

How well did you know this?

1

Not at all

2

3

4

5

Perfectly