Visual System Flashcards Preview

anatomy block 4 > Visual System > Flashcards

Flashcards in Visual System Deck (40):
1

The optic nerve is formed by --- --- --- axons

The optic nerve is formed by retinal ganglion cell axons

2

Light travels through the pupil to the back of the eye where the ---- is

Light travels through the pupil to the back of the eye where the retina

3

bipolar, horizontal & amacrine cells

Inner Nuclear Layer

4

tf INL is b/n IPL amd OPL

T

5

Ganglion cell axons

form optic n.

6

metabolically supports photoreceptors - absorbs stray light particles

RPE

7

cell bodies of rods and cones

Outer Nuclear Layer

8

9

10

11

12

anatomical and physiologic properties

group ganglion cells

13

M (or Y) ganglion cells

largest of the ganglion cells

14

extensive dendritic arbors and large receptive fields

M (or Y) ganglion cells

15

M or Y ganglion cells are predominantly found in the ----- of the retina and mainly receive input from ---

M or Y ganglion cells are predominantly found in the periphery of the retina and mainly receive input from rods

16

P (or X ) ganglion cells

central retina

17

input from cones

P (or X ) ganglion cells

18

P (or X ) ganglion cells

smaller gang cells

 

19

small dendritic arbors and small receptive fields

smaller, P (or X ) ganglion cells

20

variety of receptive field sizes and physiologic responses.

W cells (gang cells)

21

The optic nerve exits the orbit, traverses the ----- canal and emerges into the ---- cranial fossa

The optic nerve exits the orbit, traverses the optic canal and emerges into the middle cranial fossa

22

Optic Nerves

(axons of retinal ganglion cells)

23

goes to left temporal eye

nasal right visual field

24

goes 2 R temporal eye

Left nasal visual field

25

LGN to V1

optic radiation

26

tf optic chiasm to only  lateral geniculate nucleus (LGN)

f also goes to superior colliculus and pretectum

27

Area of overlap of the two visual fields (purple) 

binocular vision

28

partial crossing

visual information from the left visual field is conveyed in the right optic tract

29

right visual fields

use the left LGN

 

30

Left optic ract

used by right visual field

31

Area 17

Primary Visual Cortex

32

6 layers 

LGN

33

large cells;

eceive information about movement and contrast from M-cells

Magnocellular layers 

34

1 and 2 of LGN 

•Magnocellular layers

35

Parvocellular layers

small cells;

receive information about form and color from P-cell

36

3-6 of LGN

Parvocellular layers

37

Optic tract fibers are segregated by eye in the

LGN

38

--- LGN layers receive fibers from the ------ eye and --- layers receive fibers from the ------ eye

Three LGN layers receive fibers from the contralateral eye and 3 layers receive fibers from the ipsilateral eye

39

the upper visual field contribute to the ---- optic radiations, and terminate in the ---- aspect of V1

the upper visual field contribute to the inferior optic radiations, and terminate in the inferior aspect of V1

40

calvarian fissure

separates upper and lower visual field of V1