Exam 1: Optic Nerve

Question 1

3 layers of eye

Answer 1

Fibrous tunic
Vascular tunic
Retina

Question 2

Parts of fibrous layer

Answer 2

Sclera

Cornea

Question 3

Parts of vascular tunic

Answer 3

Ciliary body
Iris
Choroid

Question 4

Layers of retina

Answer 4

1. Pigmented
2. Photosensitive outer segment
3. External limiting membrane
4. Outer nuclear
5. Outer plexiform
6. Inner nuclear
7. Inner plexiform
8. Ganglion cell
9. Nerve fiber
10. Internal limiting membrane

Question 5

Pigmented layer adjacent to

Answer 5

Choroid

Question 6

Photosensitive outer segment has

Answer 6

Rods

Cones

Question 7

Outer nuclear layer contains

Answer 7

Rod and cone cell bodies

Question 8

Outer plexiform layer: rods and cones synapse with

Answer 8

Bipolar cells

Question 9

Inner nuclear layer contains

Answer 9

Bipolar cell bodies

Question 10

Inner plexiform layer: bipolar cells synapse with

Answer 10

Ganglion cells

Question 11

Ganglion cell layer contains

Answer 11

Ganglion cell bodies

Question 12

Nerve fiber layer contains

Answer 12

Retinal ganglion cell axons

Question 13

Retinal ganglion cell axons are ____

Answer 13

NOT myelinated

Question 14

Internal limiting membrane is glial boundary separating

Answer 14

Retina from vitreous body

Question 15

3 layers of cell bodies in eye

Answer 15

Rods/cones
Bipolar cells
Ganglion cells

Question 16

Layers of retina with synaptic activity

Answer 16

Outer plexiform

Inner plexiform

Question 17

___ require light to function

Answer 17

Cones

Question 18

Cones concentrated in

Answer 18

Fovea centralis

Question 19

Cones sense

Answer 19

Color

Question 20

Types of cones

Answer 20

Red
Green
Blue

Question 21

Rods sense

Answer 21

Light vs dark

Question 22

Rods present where in retina

Answer 22

Periphery

Question 23

Color blindness is ____

Answer 23

Sex linked

Question 24

Bipolar cell bodies found in

Answer 24

Inner nuclear layer

Question 25

Bipolar cells synapse in

Answer 25

Inner plexiform layer

Question 26

Optic disc has ___ receptors

Answer 26

None

Question 27

Optic disc is considered to be the

Answer 27

Blind spot

Question 28

Optic nerve enters skull through

Answer 28

Optic canal

Question 29

Optic nerves unite to form

Answer 29

Optic chiasma

Question 30

Are nerve fiber layer axons myelinated

Answer 30

NO

Question 31

Are optic nerve axons myelinated

Answer 31

Yes

Question 32

What cells form myelin

Answer 32

Interfascicular oligodendrocytes

Question 33

Which fibers of the retina will cross

Answer 33

Medial side

Question 34

Optic tract travels around

Answer 34

Cerebral peduncles

Question 35

Majority of optic tract fibers synapse on

Answer 35

Lateral geniculate body

Question 36

3 possible nuclei of termination for the optic tract fibers

Answer 36

LGB Superior colliculus Pretectal nucleus

Question 37

BM area of vision

Answer 37

BM 17

Question 38

Fibers synapsing in superior colliculus relay info to

Answer 38

Tectospinal tract

Question 39

2 muscles influenced by tectospinal tract

Answer 39

SCM | Trapezius

Question 40

Fibers of the pretectal nucleus deal with

Answer 40

Light reflexes

Question 41

Vision is a ___ neuron pathway

Answer 41

4

Question 42

Lesion of optic nerve

Answer 42

Lose depth perception | Lose binocular vision

Question 43

Lesion of optic chiasma

Answer 43

Tunnel vision (lose peripheral)

Question 44

Lesion of optic tract

Answer 44

Lose half of visual field

Question 45

Afferent component of visual reflexes is controlled by

Answer 45

CN 2

Question 46

Lens changes shape due to

Answer 46

ciliaris (CN3)

Question 47

Which visual reflex is CN2 not involved with

Answer 47

Corneal reflex

Question 48

Lens changes to be more __ when looking at close objects

Answer 48

Convex

Question 49

Corneal reflex uses CN __ and ___

Answer 49

``` CN 3 (somatic) CN 5 (V1) ```