Physiology of the Visual Cortex

Question 1

Monocular blindness

Answer 1

Loss of vision from 1 eye

Question 2

Bitemporal hemianopsia

Answer 2

Loss of vision from nasal retina

Question 3

Homonymous hemianopia

Answer 3

Loss of vision from the same part in each eye

Question 4

Damage to optic nerve on 1 side

Answer 4

Monocular blindness

Question 5

Damage to optic chiasma

Answer 5

Bitemporal hemianopsia

Question 6

Damage to anything behind the optic chiasm

Answer 6

Homonymous hemianopia

Question 7

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

Answer 7

4

Question 8

Layer 4 of the visual cortex projects to layers

Answer 8

2/3

Question 9

Layers 2/3 of the visual cortex project to

Answer 9

2-6

Question 10

Layer 6 of the visual cortex projects to the

Answer 10

Lateral geniculate nucleus

Question 11

Simple cortical cells are activated by

Answer 11

object orientation

Question 12

Complex cortical cells are activated by

Answer 12

Oriented edges and gratings

Stimulus must have an edge

Question 13

Hypercomplex cells are activated by

Answer 13

MOVEMENT, orientation and location

Question 14

Vertical organization of visual cortex
Horizontal
Lateral

Answer 14

Cells in different horizontal planes respond to orientations

Cells in the same vertical plane respond to the same orientation

Question 15

Ocular dominance

Answer 15

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

Question 16

Blobs

Answer 16

Cells that process color information

Interspaced between dominance columns

Question 17

Between what ages can irregular dominance columns be corrected

Answer 17

Plasticity between ages 0-6

Question 18

Esotropia

Answer 18

Cross eyed

Question 19

Exotropia

Answer 19

Divergent strabisms

Question 20

Amblyopia

Answer 20

Lazy eye

Question 21

Apperceptive agnosia

Answer 21

Inability to extract an object from the background

Question 22

Sythesia

Answer 22

physical experience activate different sensory modalaties

Question 23

Ventral stream
Recognizes
Pathway

Answer 23

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

Question 24

Dorsal stream
Recognizes
Pathway

Answer 24

Recognizes: Motion
Pathway: V1 → MT → Parietal lobe

Question 25

Color pathway

Answer 25

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

Question 26

How is motion detected

Answer 26

Eyes move or the image on the retina changes in time

Question 27

How is depth percieved

Answer 27

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

Question 28

Color Opponent Cells

Answer 28

Visual system record difference between cones in order to detect color

Question 29

Red versus

Answer 29

Green

Question 30

Blue versus

Answer 30

Yellow

Question 31

White versus

Answer 31

Black