Visual Pathway

Question 1

Fibers of the optic nerve are the axons of the cells in the

Answer 1

ganglionic layer of the retina

Question 2

Ganglionic layer of the retina converge on the

Answer 2

Optic Disc

Question 3

T or F:

Optic nerve are myelinated

Answer 3

TRUE

but the sheaths are formed from oligodendrocytes rather than Schwann cells since the optic nerve is comparable to a tract within the CNS

Question 4

The optic nerve leaves the orbital cavity through the optic canal and unites with the optic nerve of the opposite side to form the

Answer 4

Optic Chiasma

Question 5

This tract emerges from the optic chiasma and passes posterolaterally around the cerebral peduncle

Answer 5

Optic tract

Question 6

Small, oval swelling projection from the pulvinar of the thalamus which consists of six layers of cells

Answer 6

Lateral Geniculate Body

Question 7

The axons of the nerve cells within the geniculate body leave it to form the

Answer 7

Optic Radiation

Question 8

Optic radiation terminates in the

Answer 8

Visual cortex (area 17)

Question 9

Area 17 occupies the

Answer 9

upper and lower lips of the calcarine sulcus

Question 10

Responsible for recognition of objects and perception of colors

Answer 10

Visual association cortex (area 18 and 19)

Question 11

4 neurons that visual impulses to the visual cortex:

Answer 11

Rods and Cones
Bipolar Neurons
Ganglion cells
Neurons of the Lateral Geniculate Body

Question 12

Specialized receptor neurons in the retina

Answer 12

Rods and Cone

Question 13

Neurons that connect the rods and cones to the ganglion cells

Answer 13

Bipolar Neurons

Question 14

Its axons pass to the lateral geniculate body

Answer 14

Ganglion cells

Question 15

Its axons pass to the cerebral cortex

Answer 15

Neurons of the Lateral Geniculate Body

Question 16

T or F:
The image of an object in the right field of vision is projected on the nasal half of the right retina and the temporal half of the left retina

Answer 16

TRUE

Question 17

Constriction of the pupil upon which the light is shone is called

Answer 17

direct light reflex

Question 18

The constriction of the opposite pupil even though no light fell upon that eye is called

Answer 18

consensual light reftex

Question 19

T or F:
The lens thickens to increase its refractive power by contraction of the ciliary muscles and the pupils constrict to restrict the light waves to the thickest central part of the lens.

Answer 19

TRUE

Question 20

The pupil will

A. Dilate
B. Constrict
C. Not do anything

if the skin is painfully stimulated by pinching

Answer 20

A. Dilate

Question 21

A partial lesion of the optic chiasma on the lateral side

Answer 21

Nasal Hemianopia

Question 22

This would follow a sagittal section of the optic chiasma. This condition is most commonly produced by a tumor of the pituitary gland exerting pressure on the optic chiasma.

Answer 22

Bitemporal hemianopia

Question 23

This would follow division of the optic tract or optic radiation or destruction of the visual cortex on one side

Answer 23

Contralateral Homonymous Hemianopia

Question 24

Anatomy of the Visual Pathway

Answer 24

Eye -> Optic nerve -> Chiasm -> Optic Tract -> Lateral Geniculate -> Optic radiation -> Occipital Lobe

Question 25

In the eye the film of the camera is the

Answer 25

Retina

Question 26

Decussation of visual fibers

Decussation of pupil fibers

Answer 26

Chiasm

Question 27

Homonymous quadrant

Answer 27

occipital lobe

Question 28

Temporal crescent

Answer 28

occipital lobe

Question 29

Macular sparing

Answer 29

occipital lobe

Question 30

The “where” pathway of visual pathway

Answer 30

Occipitoparietal pathway

Question 31

The “what” pathway of visual pathway

Answer 31

Occipitotemporal pathway

Question 32

Acquired optic nerve disease (usually) without disc edema

Relatively painless progressive loss of vision over first week

Answer 32

Optic Neuritis

Question 33

The most common cause for disc swelling over the age of 50

Answer 33

Ischemic Optic Neuropathy