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opthomology > Neuro > Flashcards

Neuro Flashcards

1
Q

Oculomotor nerve 3

A

Motor to several extraocular mm

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2
Q

Trochlear nerve 4

A

Motor to superior oblique m

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3
Q

Trigeminal nerve 5

A

sensory to eyelids, cornea, lacrimal gland

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4
Q

Abducens nerve 6

A

motor to lateral rectus m and retractor bulbim

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5
Q

Facial nerve 7

A

motor to eyelids

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6
Q

vestibulocohlear nerve 8

A

vestibular component of ochlear nmovements

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7
Q

Afferent

A

Sensory

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8
Q

Efferent

A

Motor

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9
Q

visual sensory system (CN 2)

A

Sympathetic and parasympathetic

autonomic nervous system

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10
Q

Pupillary light reflex (PLR)

A

Pupillary constriction with bright light
Afferent: CN2
Efferent: CN3

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11
Q

Dazzle reflex test

A

Bright light in front of eye= eye close
Afferent: CN 2
Efferent: CN 7

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12
Q

What is the autonomic nervous system

A

balance between para/sympathetic innervations of iris= pupil size

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13
Q

Miosis

A

small pupil

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14
Q

Mydriasis

A

large pupil

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15
Q

Anisocoria

A

unequal pupil size

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16
Q

What are some characteristics of PRL’s

A

subcortical response
Does not test vision
Help localize a lesion
Both pupils should constrict when a bright light goes in one

17
Q

What does sympathetic innervation do to the eye

A

Pupil dilation

18
Q

Optic nerve 2

A

Sensory from retina to cortex

19
Q

What is the Schirmer Tear Test

A

assessment of the basal and reflex tear production

20
Q

1st order neurons

A

T1-T3

Diencephalic autonomic centers

21
Q

2nd order neurons

A

Preganglionic
leave spinal chord by T1-T3 roots
Join vago-sympathetic trunk and cranial cervical ganglion

22
Q

Horners syndrome

A

Sympathetic nerve paralysis

23
Q

What does the occulomotor system consist \of

A

CN3(oculomotor n): Dorsal, ventral, medial, rectus muscles, inferior oblique
CN4(trochlear): superior oblique
CN6(abducens): lateral rectus, retractor bulbi

24
Q

Strabismus

A

Lack of parallelism of the visual axes of the eyes

25
Q

Nystagmus

A

Rhythmical oscillation of the eyeballs

26
Q

Physiologic Nystagmus

A

To keep the visual target steady during head movements

27
Q

Pathologic nystagmus

A

vestibular disease

lesion of CN 8

28
Q

What nerves are used in the palpebral reflex

A

Afferent: CN 5
Efferent: CN 7

29
Q

What are the two main branches of trigeminal

A

Opthalmic

Maxillary

30
Q

What are the branches of opthalmic branch of CN 5

A

Supraorbital N: upper eyelid, forehead
Nasocilliary n: medial canthus, 3rd eyelid
Long and short ciliary: ciliary body, iris, cornia

31
Q

What are the nerves involved in corneal blink reflex

A

Afferent: CN 5
Efferent: 6&7

opthomology (7 decks)

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