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Human Form and Function > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

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2
Q

CN II

A

Optic

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3
Q

CN III

A

Oculomotor

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4
Q

CN IV

A

Trochlear

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5
Q

CN V

A

Tribe I also

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6
Q

CN VI

A

Abducens

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7
Q

CN VII

A

Facial

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8
Q

CN VIII

A

Vestibulocochlear

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9
Q

CN IX

A

Glossopharyngeal

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10
Q

CN X

A

Vagus

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11
Q

CN XI

A

Accessory

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12
Q

CN XII

A

Hypoglossal

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13
Q

T/F - CN I is covered in meninges and contains CSF specific cells

A

True, olfactory nerve is not a true cranial nerve as it is part of the telencephalon

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14
Q

Where does the CN I nerve pass thru the skull?

A

Cribiform plate

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15
Q

What type of nerve fibers in CN I?

A

Special visceral afferent nerves (viscerosensory)

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16
Q

Where does the CN II pass thru the skull?

A

Optic canal

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17
Q

T/F CN II fibers always cross at the optic chiasma

A

False - not always, some will and some will not

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18
Q

What type of nerve fibers in CN II?

A

special somatic afferent (special somatosensory)

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19
Q

Where does CN II attach to the brain?

A

Diencephalon

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20
Q

Which muscles do CN III NOT innervate?

A

Lateral rictus and superior oblique

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21
Q

Where does CN III pass thru the skull?

A

Superior orbital fissure

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22
Q

What nerve fiber types does CN III contain?

A

Somatic and visceral motor

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23
Q

The pupillary constrictors consist of what types of nerve fibers?

A

Visceral motor

24
Q

T/F CN III has somatic innervation to superior rectus, inferior rectus, medial rectus, and inferior oblique

A

True

25
Q

CN III attaches to the brain where?

A

Mesencephelon

26
Q

This nerve attaches to the brain at the mesencephalon, passes thru the superior orbital fissure, and arises on the dorsal surface of mesencephalon

A

CN IV - trochlear

27
Q

What is innervated by CN IV? Is it somatic or visceral motor control?

A

Superior oblique, somatic motor control

28
Q

T/F CN IV is the only CN to have contralateral symptoms

A

True, because the fibers cross as they emerge from the dorsal.

29
Q

What symptoms would one experience with a nuclear lesion of CN IV?

A

Contralateral

30
Q

What symptoms would one experience with a nerve lesion of CN IV?

A

Ipsilateral

31
Q

CN VI passes thru the skull where?

A

Superior orbital fissure

32
Q

What nerve fibers is CN VI contain?

A

Somatic motor control

33
Q

What does CN VI innervate?

A

Lateral rectus

34
Q

T/F CN VI attaches to the brain at the diencephalon

A

False, attaches at the pontomedullary junction

35
Q

CN V has how many branches? What are the names of each?

A

3; ophthalmic, maxillary, mandibular

36
Q

Where do the three branches of CN V pass thru the skull?

A

Opthalmic V1 - superior orbital fissure
Maxillary V2 - Foramen rotundum
Mandibular V3 - Foramen ovale

37
Q

Where does CN V attach to the brain?

A

Pons

38
Q

What are the general sensory regions of CN V ?

A

Anterior 2/3 of tongue, skin of the face, nasal mucosa

39
Q

What muscles do the CN V innervate?

A

Muscles of mastication, oral floor muscles

40
Q

What other CNs join with CN V and hitch hike?

A

CN VII join on V2 and V3 to get to glands of the face

CN IX joins V3 to get to parotid gland

41
Q

T/F - Tensor tympani and tensor veil palatine is innervated by CN IV

A

False, both innervated by CN V

42
Q

What branches come off of CN V1?

A

Frontal nerve, nasociliary, lacrimal

43
Q

What branches come off CN V2?

A 
Zygomatic
Infraorbital
Posterior alveolar
Middle alveolar
Anterior superior alveolar
44
Q

Which nerves off of CN V2 penetrate the maxillary sinus?

A

Middle alveolar and anterior superior alveolar

45
Q

Auriculotemporal, buccal, masseteric, deep temporal, and pterygoid branches come off of what CN?

A

CN V3 - mandibular

46
Q

What CN runs with the lingual nerve? Where is it going?

A

Chords tympani (CN VII) is heading toward the submandibular and sublingual glands, and taste buds for anterior 2/3 of tongue

47
Q

T/F - Inferior alveolar nerve runs lateral to the mandible

A

False, runs in the mandible as it enters the Mandibular foramen and exits the mental foramen

48
Q

Mylohoid, anterior digastric have what motor nerve supply?

A

Inferior alveolar

49
Q

What sensory fibers run in the inferior alveolar nerve of CN V3?

A

Sensory fibers to pulp of teeth and also the mental nerve, which is sensory to skin and lip.

50
Q

What five branches come off of the facial nerve CN VII?

A

Temporal, zygomatic, buccal, cervical, posterior auricular

51
Q

CN VII innervates what?

A

Muscles of facial expression

52
Q

What branch of CN VII innervates lacrimal and nasal glands?

A

Greater petrosal nerve

53
Q

What branch of VII innervates submandibular, sublingual, and taste on anterior 2/3 of tongue?

A

Chorda tympani

54
Q

T/F - chorda tympani and the greater pertrosal nerve travel thru petrous part of temporal bone and exit in the stylomastoid foramen

A

False, these two branches branch off before the rest of CN VII leaves via the stylomastoid foramen

55
Q

T/F - CN VIII is motor only

A

False, CN VIII (vestibulocochlear) is sensory only

56
Q

T/F - CN IX has both motor and sensory nerve fibers

A

True

57
Q

Where does CN IX exit the skull?

A

Jugular foramen

Human Form and Function (5 decks)

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