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Physiological optics and Binocular Vision > Visual pathway and Lesions on the Visual Pathway > Flashcards

Visual pathway and Lesions on the Visual Pathway Flashcards

1
Q

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

A

Retina

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2
Q
  • Nerve of sight
  • Functions to unite the brain and the retina
A

OPTIC NERVE

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3
Q

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

A

OPTIC CHIASMA

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4
Q

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

A

OPTIC TRACT

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5
Q
  • 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
A

LATERAL GENICULATE BODY

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6
Q

Carry visual impulse to area striata

A

OPTIC RADIATION

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7
Q

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

A

VISUAL CORTEX/ AREA STRIATA/ BROADMAN AREA #17

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8
Q

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

A

Opposite

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9
Q

complete inability of the eye to see

A

Blindness

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10
Q

one eye is completely blind

A

monocular/uniocular blindness

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11
Q

half blindness

A

HEMIANOPSLA/HEMIANOPIA

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12
Q

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

A

HETERONYMOUS HEMIANOPSIA

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13
Q
  • Loss of either right or left hemifield
  • Both eyes are blind to either right or left side
A

HOMONYMOUS HEMIANOPSIA

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14
Q
  • Hemianopsia on both eyes are completely symmetrical in extent and intensity
  • Same size, shape and position
  • Damage/lesion is closer to the brain
A

CONGROUS HEMIANOPSIA

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15
Q
  • Visual field defects are dissimilar in both eyes
  • Damage /lesion is farther to the brain
A

INCONGROUS HEMIANOPSIA

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16
Q

damage on the optic nerve

A

total blindness of the affected eye

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17
Q

damage on the OPTIC CHIASMA

A

heteronymous hemianopsia

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18
Q

damage on the CROSSED OPTIC CHIASMA

A

bi-temporal heteronymous

19
Q

damage on the UNCROSSED OPTIC CHIASMA

A

bi-nasal heteronymous

20
Q

damage on ONE SIDE OF CHIASMA

A

nasal hemianopsia

21
Q

damage on OPTIC TRACT

A

incongrous homonymous hemianopsia

22
Q

damage on the RIGHT OPTIC TRACT

A

left incongrous homonymous

23
Q

damage on the LEFT OPTIC TRACT

A

right incongrous homonymous

24
Q

damage on the LATERAL GENICULATE BODY

A

congrous homonymous hemianopsia

25
Q

damage on the RIGHT LGB

A

left homonymous hemianopsia (complete)

26
Q

damage on the LEFT LGB

A

right homonymous hemianopsia (complete)

27
Q

damage on the OPTIC RADIATION

A

congrous homonymous hemianopsia

28
Q

damage on the RIGHT OR

A

left homonymous hemianopsia (complete)

29
Q

damage on the LEFT OR

A

right homonymous hemianopsia (complete)

30
Q

damage on the RIGHT TEMPORAL OR

A

right nasal hemianopsia

31
Q

damage on the RIGH NASAL OR

A

left temporal hemianopsia

32
Q

damage on the LEFT TEMPORAL OR

A

left nasal hemianopsia

33
Q

damage on the LEFT NASAL OR

A

right temporal hemianopsia

34
Q

damage on the LEFT NASAL OR

A

right temporal hemianopsia

35
Q

damage on the AREA STRIATA/ AREA #17

A

homonymous scotoma

36
Q

Perception of light is entirely lost

A

ABSOLUTE SCOTOMA

37
Q

Perception of light is only diminished

A

RELATIVE SCOTOMA

38
Q
  • Appears as black spot in the visual field
  • Patient is not aware; detected only by examination
A

NEGATIVE SCOTOMA

39
Q

Dark spot in the visual field

A

POSITIVE SCOTOMA

40
Q

scotoma that Involves the point of fixation

A

CENTRAL SCOTOMA

41
Q

scotoma that Involves peripheral areas

A

PERIPHERAL SCOTOMA

42
Q

scotoma that Involves peripheral areas

A

PERIPHERAL SCOTOMA

43
Q

scotoma that are Usual on persons with migraine

A

SCINTILLATING SCOTOMA

44
Q
  • Extension of blindspot
  • Arch-like
  • Early stages of glaucoma
A

ARCUATE SCOTOMA

Physiological optics and Binocular Vision (12 decks)

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