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Anatomy Exam 3 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

Trigeminal nerve skeletal components

A

Malleus, Incus

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2
Q

Trigeminal nerve muscles

A

Muscles of Mastication, Tensor tympani, Tensor palati, Mylohyoid, ant belly of Digastric

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3
Q

Facial nerve skeletal components

A

Stapes, Styloid process, Hyoid bone - lesser horn, upper half of body

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4
Q

Facial nerve muscles

A

Muscles of Facial Expression, Stapedius, Stylohyoid, Post. belly of Digastric

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5
Q

Glossopharyngeal nerve skeletal components

A

Hyoid bone - greater horn, lower half of body

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6
Q

Glossopharyngeal nerve muscles

A

Stylopharyngeus

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7
Q

Vagus nerve skeletal components

A

Cartilages of Larynx

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8
Q

Vagus nerve muscles

A

All muscles of Larynx, All muscles of Pharynx (except Stylopharyngeus), All muscles of Soft Palate (except Tensor palati)

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9
Q

Spinal Accessory nerve innervates

A

Sternocleidomastoid, Trapezius

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10
Q

Olfactory nerve is formed by

A

the axons of the bipolar neurons in the olfactory mucosa

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11
Q

Olfactory nerve axons pass through

A

the cribriform plate of the ethmoid bone

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12
Q

Olfactory nerve axons synapse on

A

the olfactory bulb, an extension of the CNS

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13
Q

optic nerve is formed by

A

the axons of ganglion cells in the retina

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14
Q

The optic nerve is ensheathed by

A

the oligodendrocytes (CNS)

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15
Q

the optic nerve enters the skull through

A

the optic canal

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16
Q

if the optic nerve is severed,

A

you are blind in 1 eye

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17
Q

if optic chiasm severed,

A

lose some vision in both eyes (peripheral vision)

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18
Q

if sever right optic tract,

A

lose left field of vision in both eyes

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19
Q

Oculomotor nerve innervates

A

all of the extraorbital muscles, except:
Superior Oblique
Lateral Rectus

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20
Q

the oculomotor nerve enters the orbit via

A

the superior orbital fissure

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21
Q

Oculomotor nerve passes through _______, accompanied by

A

the cavernous sinus accompanied by the trochlear (IV) and abducens nerves (VI)

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22
Q

parasympathetic components of oculomotor nerve

A

constrictor muscle of pupil, ciliary muscle (alteration of thickness of lens), accomodation

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23
Q

What nerve is the only cranial nerve that is crossed (crosses before it leave the brainstem)?

A

trochlear nerve

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24
Q

the trochlear nerve innervates

A

the superior oblique muscle

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25
Q

the trochlear nerve exits via

A

the superior orbital fissure

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26
Q

what is the largest cranial nerve?

A

trigeminal nerve

27
Q

branches of trigeminal nerve

A

ophthalmic, maxillary and mandibular

28
Q

trigeminal nerve gives sensory innervation to

A

the face, scalp, dura mater, eyeball, paranasal sinuses, anterior 2/3 of the tongue, floor of the mouth, teeth, lingual gingiva, palate, nasal cavity, nasopharynx, and external ear

29
Q

Ophthalmic branch exits through

A

the superior orbital fissure

30
Q

Maxillary branch exits through

A

the foramen rotundum

31
Q

mandibular branch exits through

A

the foramen ovale

32
Q

the abducens nerve innervates

A

the lateral rectus muscle (abduction of pupil)

33
Q

the supratrochlear nerve comes out above

A

the trochlear nerve

34
Q

action of the superior oblique

A

pulls down the eye

35
Q

tensor tympani action

A

lessens vibration (with loud noise)

36
Q

tensor palatini

A

tenses soft palate

37
Q

action of medial rectus

A

adducts pupil

38
Q

action of superior rectus

A

elevates pupil

39
Q

action of inferior rectus

A

depresses pupil

40
Q

action of inferior oblique

A

pulls eye up

41
Q

the facial nerve emerges (exits) at the

A

cerebellopontine angle

42
Q

the facial nerve enters the ________ with the ______.

A

internal acoustic meatus with the CN VIII

43
Q

the facial nerve descends through

A

the inner ear

44
Q

The facial nerve emerges through

A

the stylomastoid foramen

45
Q

The facial nerve is ________ sensory, trigeminal is _____ sensory

A

taste; touch

46
Q

The parasympathetic component of the facial nerve supplies

A

the lacrimal and parotid glands

47
Q

bell’s palsy

A

damage to the facial nerve; can’t move one side of the face

48
Q

Vestibulocochlear nerve exits via

A

the internal acoustic meatus and then divides into cochlear and vestibular divisions

49
Q

Vestibulocochlear nerve has 2 components:

A

cochlea and vestibular apparatus (semicircular canals)

50
Q

Glossopharyngeal nerve exits via

A

the jugular foramen accompanied with CN X & CNXI

51
Q

the superior ganglia of the glossopharyngeal nerve gives sensation to

A

the oropharynx

52
Q

the inferior ganglia of the glossopharyngeal nerve gives sensation to

A

(taste) to the posterior third of the tongue

53
Q

What is the longest cranial nerve

A

vegas

54
Q

Emerges just inferior to IX

A

the vegas nerve

55
Q

where does the vegas nerve exit?

A

Exits through the jugular foramen with IX and XI

56
Q

the vegas nerve nerve gives sensation to

A

dura of posterior cranial fossa
Concha & external acoustic meatus and external surface of tympanic membrane
Larynx

57
Q

vegas nerve innervates what muscles?

A

Muscles of the soft palate, larynx
parasympathetic preganglionic fibers thoracic and abdominal viscera to the junction of the right 2/3 and left 1/3 of the transverse colon (goes to splenic fissure)

58
Q

Accessory nerve is composed of two parts:

A

cranial and spinal

59
Q

cranial part of accessory nerve

A

leaves the accessory nerve after entering the jugular foramen and joins the vagus nerve

60
Q

spinal part of accessory nerve

A

enters through foramen magnum and joins the cranial part at jugular foramen

61
Q

The hypoglossal nerve emerges from the

A

hypoglossal canal

62
Q

The hypoglossal nerve innervates

A

all lingual muscles with the exception of palatoglossus

63
Q

If there is a lesion on the left side of the tongue,

A

the tongue will go to the left

Anatomy Exam 3 (7 decks)

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