Visual pathway and Lesions on the Visual Pathway

Question 1

Thin, transparent membrane where images are cast and where nerve impulses are generated and conveyed to the optic nerve

Answer 1

Retina

Question 2

• Nerve of sight
• Functions to unite the brain and the retina

Answer 2

OPTIC NERVE

Question 3

the Non-decussating, uncrossed, external/lateral fibers and
Decussating, crossed, internal/medial fibers

Answer 3

OPTIC CHIASMA

Question 4

Posterior continuation of optic chiasma with its fibers terminating at lateral geniculate body

Answer 4

OPTIC TRACT

Question 5

• Serves as the end station for some visual fibers
• Regarded as sub-cortical visual center of brain, serving as a relay station between retina and cortex

Answer 5

LATERAL GENICULATE BODY

Question 6

Carry visual impulse to area striata

Answer 6

OPTIC RADIATION

Question 7

Visual/optic center of the brain located at medial aspect of the occipital lobe True visual cortex (true receptive center of visual impressions)

Answer 7

VISUAL CORTEX/ AREA STRIATA/ BROADMAN AREA #17

Question 8

Any problems on the pathway is projected on what side of the visual field?

Answer 8

Opposite

Question 9

complete inability of the eye to see

Answer 9

Blindness

Question 10

one eye is completely blind

Answer 10

monocular/uniocular blindness

Question 11

half blindness

Answer 11

HEMIANOPSLA/HEMIANOPIA

Question 12

Loss of vision on either temporal side (peripheral blindness) or nasal side (central blindness)

Answer 12

HETERONYMOUS HEMIANOPSIA

Question 13

• Loss of either right or left hemifield
• Both eyes are blind to either right or left side

Answer 13

HOMONYMOUS HEMIANOPSIA

Question 14

• Hemianopsia on both eyes are completely symmetrical in extent and intensity
• Same size, shape and position
• Damage/lesion is closer to the brain

Answer 14

CONGROUS HEMIANOPSIA

Question 15

• Visual field defects are dissimilar in both eyes
• Damage /lesion is farther to the brain

Answer 15

INCONGROUS HEMIANOPSIA

Question 16

damage on the optic nerve

Answer 16

total blindness of the affected eye

Question 17

damage on the OPTIC CHIASMA

Answer 17

heteronymous hemianopsia

Question 18

damage on the CROSSED OPTIC CHIASMA

Answer 18

bi-temporal heteronymous

Question 19

damage on the UNCROSSED OPTIC CHIASMA

Answer 19

bi-nasal heteronymous

Question 20

damage on ONE SIDE OF CHIASMA

Answer 20

nasal hemianopsia

Question 21

damage on OPTIC TRACT

Answer 21

incongrous homonymous hemianopsia

Question 22

damage on the RIGHT OPTIC TRACT

Answer 22

left incongrous homonymous

Question 23

damage on the LEFT OPTIC TRACT

Answer 23

right incongrous homonymous

Question 24

damage on the LATERAL GENICULATE BODY

Answer 24

congrous homonymous hemianopsia

Question 25

damage on the RIGHT LGB

Answer 25

left homonymous hemianopsia (complete)

Question 26

damage on the LEFT LGB

Answer 26

right homonymous hemianopsia (complete)

Question 27

damage on the OPTIC RADIATION

Answer 27

congrous homonymous hemianopsia

Question 28

damage on the RIGHT OR

Answer 28

left homonymous hemianopsia (complete)

Question 29

damage on the LEFT OR

Answer 29

right homonymous hemianopsia (complete)

Question 30

damage on the RIGHT TEMPORAL OR

Answer 30

right nasal hemianopsia

Question 31

damage on the RIGH NASAL OR

Answer 31

left temporal hemianopsia

Question 32

damage on the LEFT TEMPORAL OR

Answer 32

left nasal hemianopsia

Question 33

damage on the LEFT NASAL OR

Answer 33

right temporal hemianopsia

Question 34

damage on the LEFT NASAL OR

Answer 34

right temporal hemianopsia

Question 35

damage on the AREA STRIATA/ AREA #17

Answer 35

homonymous scotoma

Question 36

Perception of light is entirely lost

Answer 36

ABSOLUTE SCOTOMA

Question 37

Perception of light is only diminished

Answer 37

RELATIVE SCOTOMA

Question 38

* Appears as black spot in the visual field * Patient is not aware; detected only by examination

Answer 38

NEGATIVE SCOTOMA

Question 39

Dark spot in the visual field

Answer 39

POSITIVE SCOTOMA

Question 40

scotoma that Involves the point of fixation

Answer 40

CENTRAL SCOTOMA

Question 41

scotoma that Involves peripheral areas

Answer 41

PERIPHERAL SCOTOMA

Question 42

scotoma that Involves peripheral areas

Answer 42

PERIPHERAL SCOTOMA

Question 43

scotoma that are Usual on persons with migraine

Answer 43

SCINTILLATING SCOTOMA

Question 44

* Extension of blindspot * Arch-like * Early stages of glaucoma

Answer 44

ARCUATE SCOTOMA