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Neuro Mini Exam > Central Visual Pathways > Flashcards

Central Visual Pathways Flashcards

1
Q

central pathway

A

optic nerve

optic chiasm, optic tract

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2
Q

lateral geniculate nucleus

A

thalamic relay nucleus for vision

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3
Q

destinations for axons of optic tract

A

lateral geniculate nucleus (80%)

pretectal nuclei
superior colliculus
hypothalamus
reticular formation

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4
Q

pretectal nuclei

A

rostral midbrain

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5
Q

visual field

A

view seen by eyes without moving head

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6
Q

binocular

A

part of visual field seen by both eyes

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7
Q

monocular

A

part of visual field viewed by 1 eye

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8
Q

visual hemifields

A

left and right

division of visual fields

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9
Q

optic tract

A

carries info from contralateral visual field

cortex receives info from contralateral visual fields

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10
Q

optic radiation

A

axons from lateral geniculate nucleus

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11
Q

meyers loop

A

more anteriorly into temporal lobe

  • superior visual field
  • DAMAGE here significant**
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12
Q

primary visual cortex

A

brodmans area 17

aka lingual gyrus and cuneus

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13
Q

striations in primary visual cortex

A

aka striate cortex

line of axons

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14
Q

geniculostriate tract

A

LGN to the primary visual cortex

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15
Q

pretectal nuclei

A

control of pupillary light reflexes

anterior to the superior colliculus

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16
Q

pupillary light reflex

A 
receptor - retina
primary afferent - optic n.
interneuron - pretectal nuclei
motor neuron - edinger-westphal nucleus to oculomotor n.
target - pupillary sphincter muscle
17
Q

edinger westphal nucleus

A

motor nucleus of the pupillary light reflexes

-axons - oculomotor nerve

18
Q

constriction of pupil

A

oculomotor

-parasympathetic

19
Q

dilation of pupil

A

sympathetics

20
Q

control of pupil size

A

GVE

-not under voluntary control

21
Q

sympathetics to iris

A

postganglionic cell bodies are in the superior cervical ganglion

-follow blood vessels

22
Q

superior colliculus

A

coordinates visual grasp reflex

-visual stimulus activates tectospinal tract

23
Q

suprachiasmatic nucleus

A

anterior hypothalamus

circadian rhythms

melanopsin system

24
Q

primary visual cortex

A

brodmans area 18/19

  • processing and interpretation
  • look at picture - pick out specifics quickly
25
Q

movement and where is it?

A

dorsal pathway

-to parietal region

26
Q

color and what is it?

A

ventral pathway

-to temporal region

27
Q

prosobagnosia

A

inablity to recognize faces and facial expression

28
Q

temporal or nasal

A

referring to visual field

29
Q

homonymous

A

same side

30
Q

anopia

A

without vision

31
Q

hemianopia

A

without half vision

Neuro Mini Exam (7 decks)

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