Optic Chiasm/Lateral Geniculate Body of thalamus

Question 1

Optic chiasm: Neurons carrying info from —- cross to —-

Answer 1

Neurons carrying information from medial (inner halves or nasal side) cross to contralateral hemisphere

Question 2

What results in neurons carrying info from medial cross to contralateral hemisphere

Answer 2

This results in L field information going to R hemisphere and R field information going to L hemisphere throughout rest of visual system

Question 3

Lateral geniculate body of thalamus

Answer 3

6 layer plus sublayer: 1-2 magnocellular (large cells); 3-6 parvocellular (small cells)

Question 4

1-2 magnocellular layers (large cells)

Answer 4

Receive input from rods and are therefore sensitive to light but not color

Question 5

3-6 parvocellular layers (small cells)

Answer 5

Receives input from cones; thus, more sensitive to color and less to light

Question 6

Koniocellular

Answer 6

between each magno and parvo layer – also receives input from cones

Question 7

Each layer projects to a specific area in the —- and the —- is preserved in the —-.

Answer 7

Each of these layers projects to a specific area in the visual (striate) cortex and the segregation of information they transmit is preserved in the cortex

Question 8

What projects from the lateral geniculate (LGN) to the visual cortex?

Answer 8

Optic radiations