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Anatomy > Visual Pathway > Flashcards

Visual Pathway Flashcards

1
Q

Three neurons of retina

A
  • photoreceptors
  • bipolar cells
  • ganglions
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2
Q

What forms the axons of ganglion cells?

A
  • optic nerve, chiasma and tract
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3
Q

Also known as geniculocalcacrine tract or geniculostriate

A

Optic radiation

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4
Q

Area 17

A

Striate or calcacrine cortex

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5
Q

What forms the axons from LGB?

A

Optic radiation

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6
Q

Two divisions of retina

A

Nasal and temporal

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7
Q

Two zones of visual field

A
  • binocular

- monocular

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8
Q

Series of gray mater, flattened nucleus so it is striated or laminated

A

Lateral geniculate body

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9
Q

Lesion on the entire length of the optic radiation will result blindness on the left is called?

A

Left homonymous hemaniopsia

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10
Q

Lesion on the superior part of the optic radiation will produce?

A

Quadrantinopsia

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11
Q

Rounds the temporal horn of the lateral ventricle which refers to the lower fiber of the optic radiation

A

Meyer’s loop

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12
Q

Lesion in meyer’s loop

A

Right upper quadrantonopsia

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13
Q

Where does the fibers from upper and lower quadrants of visual field and the lower and upper quadrants of retina terminated?

A

Upper visual and lower retina- Lateral part LGB

Lower visual and upper retina medial part of LGB

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14
Q

Location of area 17

A

Upper banks of calcacrine sulcus

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15
Q

The central portion of the retina is the area of most acute vision is called?

A

Macula lutea

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16
Q

An area of pure cones in the macula lutea

A

Fovea centralis

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17
Q

Lesion in the dual blood supply

A

Macular sparring

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18
Q

Blood supply of visual cortex

A
  • posterior cerebral artery

- middle cerebral artery

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19
Q

The tip of occipital lobe where the macular or central homonymous hemifields are represented is supplied by branches of the middle and posterior cerebral arteries

A

Watershed area

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20
Q

Lesion of the optic nerve

A

Blindness or anopsia

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21
Q

Lesion on the optic chiasm

A

Bitemporal or binasal hemianopsia

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22
Q

Termination pathway of optic tract

A
  • LGN
  • Suprachiasmatic nucleus of the hypothalamus
  • pretectal nucleus
  • superior colliculus
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23
Q

Most of the fibers of optic tract terminated here

24
Q

Vision have major role in endocrine and autonomic function

A

Suprachiasmatic nucleus of the hypothalamus

25
Q

Area of the midbrain, anterior to the tectum

A

Pretectal cortex

26
Q

Optic pathway termination involved in pupillary constriction

27
Q

Fibers here are involved in the reflex movements of the eye, head and the upper lim in response to visual stimulation

A

Superior colliculus

28
Q

Nucleus is involved with the production of direct and consensual light reflex

A

Pretectal nucleus

29
Q

Stimulation of one eye by applying the penlight will cause constriction of the pupil on the same side

A

Direct light reflex

30
Q

Stimulation of one eye will cause constriction of the pupil of the other eye

A

Consensual light reflex

31
Q

Trace the neural pathway starting from the retina

A

Retina > optic nerve > optic chiasma > optic tract > pretectal nucleus

32
Q

Three process of accomodation reflex

A
  • pupillary constriction
  • thickening of the lenses
  • ocular convergence
33
Q

Occurs when an object in focus brought nearer

A

Accomodation

34
Q

Nerve supply of medial rectus muscle

A

CN III occulomotor

35
Q

The nucleus responsible for ocular convergence

A

Nucleus of perlia

36
Q

Paralysis of sphincter pupillae due to lesion of oculomotor nerve

A

Anisocoria

37
Q

Disease that is characterized by short parasympathetic ganglion, lesion of postganglionic fiber and pupil dilatation

A

Adies syndrome

38
Q

Located in the medial aspect of cerebral hemisphere

A

Limbic system

39
Q

Extend from the hypothalamus to the spinal cord passing thru the lateral horn

A

Longitudinal fasciculus of schudtz

40
Q

Termination pathway of optic tract

A
  • LGN
  • Suprachiasmatic nucleus of the hypothalamus
  • pretectal nucleus
  • superior colliculus
41
Q

Most of the fibers of optic tract terminated here

42
Q

Vision have major role in endocrine and autonomic function

A

Suprachiasmatic nucleus of the hypothalamus

43
Q

Area of the midbrain, anterior to the tectum

A

Pretectal cortex

44
Q

Optic pathway termination involved in pupillary constriction

45
Q

Fibers here are involved in the reflex movements of the eye, head and the upper lim in response to visual stimulation

A

Superior colliculus

46
Q

Nucleus is involved with the production of direct and consensual light reflex

A

Pretectal nucleus

47
Q

Stimulation of one eye by applying the penlight will cause constriction of the pupil on the same side

A

Direct light reflex

48
Q

Stimulation of one eye will cause constriction of the pupil of the other eye

A

Consensual light reflex

49
Q

Trace the neural pathway starting from the retina

A

Retina > optic nerve > optic chiasma > optic tract > pretectal nucleus

50
Q

Three process of accomodation reflex

A
  • pupillary constriction
  • thickening of the lenses
  • ocular convergence
51
Q

Occurs when an object in focus brought nearer

A

Accomodation

52
Q

Nerve supply of medial rectus muscle

A

CN III occulomotor

53
Q

The nucleus responsible for ocular convergence

A

Nucleus of perlia

54
Q

Paralysis of sphincter pupillae due to lesion of oculomotor nerve

A

Anisocoria

55
Q

Disease that is characterized by short parasympathetic ganglion, lesion of postganglionic fiber and pupil dilatation

A

Adies syndrome

56
Q

Located in the medial aspect of cerebral hemisphere

A

Limbic system

57
Q

Extend from the hypothalamus to the spinal cord passing thru the lateral horn

A

Longitudinal fasciculus of schudtz

Anatomy (11 decks)

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