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Neuro-Unit 3 > Friday, 4-22-Visual System (Stephens) > Flashcards

Friday, 4-22-Visual System (Stephens) Flashcards

1
Q

The visual field projects an __ image onto the retinal field

A

Inverted and reversed

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2
Q

The upper nasal visual quadrant projects to the __ retinal quadrant

A

Lower temporal

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3
Q

The lower nasal visual quadrant projects to the __ retinal quadrant

A

Upper temporal

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4
Q

The upper temporal visual quadrant projects to the __ retinal quadrant

A

Lower nasal

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5
Q

The lower temporal visual quadrant projects to the __ retinal quadrant

A

Upper nasal

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6
Q

The ___ pathway constitues the primary pathway for visual information

A

Retinogeniculostriate

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7
Q

Which fibers from the hemiretina cross in the optic chiasma?

A

Fibers from the nasal hemiretina

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8
Q

Information from the lower hemiretina projects to ___

A

Lateral part of the Lateral geniculate body, the Loop of meyer, and the Lingual gyrus

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9
Q

__ refer to corresponding halves of visual fields such as the temporal field of 1 eye and the nasal field of the other.

A

Homonymous visual fields

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10
Q

___ refer to noncorresponding visual fields (i.e., temporal field of 1 eye and temporal field of the other)

A

Heteronymous visual fields

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11
Q

The right nasal field of the left eye and the right temporal field of the right eye are an example of a __ visual field

A

Homonymous

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12
Q

The right nasal field of the left eye and the left nasal field of the right eye is an example of a __ visual field

A

Heteronymous

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13
Q

Monocular blindness is due to a lesion of the ___

A

Optic nerve

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14
Q

Binasal hemianopia is due to a bilateral lesion of the ___ that results in a heteronymous blindness in the nasal fields of each eye.

A

Lateral aspect of the optic chiasma

It may also be unilateral since it is frequently due to atherosclerosis of the ICAs

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15
Q

A unilateral lesion of the lateral aspect of the optic chiasma results in a __ of the ipsilateral eye

A

Nasal hemianopia

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16
Q

A lesion of the temporal retina of the left eye would result in a __

A

Right nasal hemianopia of the left eye

17
Q

Bitemporal hemianopia may be due to a ___

A

Midline lesion of the medial portion of the optic chiasma

18
Q

Bitemporal hemianopsia is usually caused by a ___

A

Pituitary tumor

19
Q

Unilateral lesions of the lateral geniculate body, complete optic radiations, or visual cortex result in a ___

A

Contralateral homonymous hemianopsia

20
Q

Unilateral lesions of the __ usually result in contralateral superior quadrantanopia

A

Loop of meyer

21
Q

A left superior quadrantanopia would indicate a lesion of the ___

A

Right loop of meyer

22
Q

An incongruent contralateral homonymous hemianopia with macular sparing is usually indicative of a unilateral lesion of the ___

A

Visual cortex and may be due to obstruction of posterior cerebral artery

23
Q

A left homonymous hemianopia with macular sparing would indicate a lesion of the __

A

Right primary visual cortex

24
Q

The pupillary constriction associated with a normal response to shining an exam light into a patients eye is a parasympathetic mediated response that is centrally processed through the ___

A

Pretectum

25
Q

__ is the critical link for the consensual light reflex

A

Posterior commissure

26
Q

Accomodation is a __ -mediated visual response which originates in the frontal eye field of the frontal lobe.

A

Cortically

27
Q

__ fibers synapse on the edinger-westphal and oculomotor nuclei to produce the triad of accomodation

A

Corticotectal fibers

28
Q

Holmes-adie pupil or tonic pupil is a benign condition, which may be due to a lesion of the ___

A

Ciliary ganglion

29
Q

Voluntary movements of the eyes are controlled by the __

A

Frontal eye fields

30
Q

Nonvolitional eye movements are controlled by the __

A

Occipital eye fields

31
Q

Clinically, lesions of the visual system are always described in terms of their __ deficits

A

Visual field

Neuro-Unit 3 (21 decks)

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