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Flashcards in Vision Deck (20):
1

What shape are the receptive fields in the retina?

Circular

2

What do the receptive fields of the retina project to?

The lateral geniculate

3

How is V1 arranged?

In cortical modules (columns)
- Oriented to one point in visual space (shape, color, movement)
- One column for each eye

4

What are the subunits of the cortical modules of vision? Which is the functional unit?

Blobs (functional unit)
Interblobs

5

Which stream is the where pathway, and which is the what pathway?

Dorsal: Where
Ventral: What

6

What structures make up the dorsal stream of vision?

Parietal lobe
Striatum

7

What is the MT portion of the dorsal stream's function?

Visual perception of motion

8

What is the MST portion of the dorsal stream's function?

Neuronal response to complex motion-sensitive properties

9

What is the general function of the dorsal stream of vision?

- Visual coordinates
- Spatial orientation

10

What structures form the ventral stream of vision?

Striatum
Temporal lobe

11

What is the function of the ventral stream?

Puts information together to form object (colro, shape, name)

12

What is the function of V4?

- Afferents from blob and interblob areas
- Shape and color perception

13

What is the function of IT?

- Visual perception/ memory
- Force
- Faces
- Name and recognition of objects

14

What can result form a lesion of IT?

Prosopagnosia
(can't recognize faces even though vision is normal)

15

What percentage of fibers of vision project to the autonomic nervous system? What is their function?

20 %
- Arousal

16

How divisions does the striate cortex have?

6.. sort of
Layer 4 is subdivided 5 times
- Same overall structure

17

What are the units of the retina? What sense does each correspond to?

- Cones (color/ acute vision)
- Rods (peripheral vision)

18

What is the novel stimulus of the retina?

Photons

19

What enters at the optic disk?

The optic nerve

20

What is the macula? What is found in the middle of the macula?

- Dense portion of middle of retina
- Fovea of dense cones found in middle