6- Vision

Question 1

Astigmatism

Answer 1

blurring of vision for lines in one direction causred by asymetrical curvature of eyes

Question 2

Lateral geniculate nucleus

Answer 2

in Thalamus

-where most ganglion cells go
Send axons to other parts of thalamus and cortex

Question 3

Lateral inhibition

Answer 3

Sharpening contrast to emphasize object borders

Light decreases inhibitory output of rods and cones to bipolar cells

Horizontal cell stimulated by receptor also stimulates surrounding cells to lesser extent

Question 4

Parvocellular neurons

Magnocellular

Kiniocellular

Answer 4

P detail and color
M movement and lg overall patterns
K many fxns

Question 5

Ventral vs dorsal stream

Answer 5

V what path, temporal

D where how path, parietal

Question 6

Area V1, V2, V3, V4, V5

Answer 6

V1- primary visual cortex, simple (bar/edge) & complex cells

V2- secondary visual cortex, complex cells (pattern of light)

V3-

V4- color constancy, visual attention

V5- MT (middle temporal cortex)- respond when something moves at a particular speed in a particular direction

MST (medial superior temporal cortex)- Dorsal MST- expansion/contraction/rotation of lg visual scene
Ventral MST- convergence of messages from MT and dorsal MST cells (object moving relative to its background)

Inferior temporal cortex- cells detect objects, not amt of light on retina (shape constancy)