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Neuro II > Physiology of the Visual Cortex > Flashcards

Physiology of the Visual Cortex Flashcards

1
Q

Monocular blindness

A

Loss of vision from 1 eye

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2
Q

Bitemporal hemianopsia

A

Loss of vision from nasal retina

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3
Q

Homonymous hemianopia

A

Loss of vision from the same part in each eye

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4
Q

Damage to optic nerve on 1 side

A

Monocular blindness

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5
Q

Damage to optic chiasma

A

Bitemporal hemianopsia

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6
Q

Damage to anything behind the optic chiasm

A

Homonymous hemianopia

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7
Q

The lateral geniculate nucleus projects to watch layer (1-6) of the visual cortex?

A

4

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8
Q

Layer 4 of the visual cortex projects to layers

A

2/3

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9
Q

Layers 2/3 of the visual cortex project to

A

2-6

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10
Q

Layer 6 of the visual cortex projects to the

A

Lateral geniculate nucleus

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11
Q

Simple cortical cells are activated by

A

object orientation

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12
Q

Complex cortical cells are activated by

A

Oriented edges and gratings

Stimulus must have an edge

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13
Q

Hypercomplex cells are activated by

A

MOVEMENT, orientation and location

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14
Q

Vertical organization of visual cortex
Horizontal
Lateral

A

Cells in different horizontal planes respond to orientations

Cells in the same vertical plane respond to the same orientation

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15
Q

Ocular dominance

A

Cells that receive input from the same piece of retina in different eyes are located side by side, one eye dominates

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16
Q

Blobs

A

Cells that process color information

Interspaced between dominance columns

17
Q

Between what ages can irregular dominance columns be corrected

A

Plasticity between ages 0-6

18
Q

Esotropia

A

Cross eyed

19
Q

Exotropia

A

Divergent strabisms

20
Q

Amblyopia

21
Q

Apperceptive agnosia

A

Inability to extract an object from the background

22
Q

Sythesia

A

physical experience activate different sensory modalaties

23
Q

Ventral stream
Recognizes
Pathway

A

Recognizes: Color & objects
Pathway: V1 → V4 → Temporal lobe

24
Q

Dorsal stream
Recognizes
Pathway

A

Recognizes: Motion
Pathway: V1 → MT → Parietal lobe

25
Q

Color pathway

A

Receptor → P ganglion → Lateral Geniculate → Bloobs → V4 or V19

26
Q

How is motion detected

A

Eyes move or the image on the retina changes in time

27
Q

How is depth percieved

A

Monocular cues for vision beyond 100 feet
- Relative size
- Previous familiarity
- Shadows
- Motion parallax
Stereoscopic cues under 100 feet
- Object appears in different places in each retina

28
Q

Color Opponent Cells

A

Visual system record difference between cones in order to detect color

29
Q

Red versus

30
Q

Blue versus

31
Q

White versus

Neuro II (7 decks)

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