Cranial Nerves 10/3/16 Flashcards Preview

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Flashcards in Cranial Nerves 10/3/16 Deck (77):
1

What is CN I?

Olfactory nerve

2

Where does CN I run through?

Cribriform Plate (Foramina)

3

What is CN II?

Optic Nerve

4

Where does CN II run through?

Optic Canal

5

What is CN III?

Oculomotor

6

What does CN III run through?

Superior orbital fissure

7

What is CN IV?

Trochlear nerve

8

What does CN IV run through?

Superior orbital fissure

9

What is CN V?

Trigeminal nerve

10

What does CN V run through?

V1-Superior orbital fissure
V2-Foramen rotundum
V3-Foramen ovale

11

What is CN VI?

Abducens nerve

12

Where does CN VI run through?

Superior orbital fissure

13

What is CN VII?

Facial nerve

14

What does CN VII run through?

Internal acoustic meatus

15

What is CN VIII?

Vestibulocochlear nerve

16

Where does CN VIII run through?

Internal acoustic meatus

17

What is CN IX?

Glossopharyngeal nerve

18

Where does CN IX run through?

Jugular foramen

19

What is CN X?

Vagus nerve

20

Where does CN X run through?

Jugular foramen

21

What is CN XI?

Accessory nerve

22

Where does CN XI run through?

Jugular foramen

23

What is CN XII?

Hypoglossal nerve

24

What does CN XII run through?

Hypoglossal canal

25

Which CN has special sensory functions, is only sensory, and part of the telencephalon?

CN I - Olfactory nerve

26

True olfactory fibers run from olfactory epithelium in nasal cavity thru cribriform plate and innervate what?

Olfactory bulb

27

Which CN has special sensory functions, is only sensory, and part of the diencephalon?

CN II - Optic nerve

28

T/F
Most fibers from the optic nerve cross at the optic chiasm but some do not cross.

True

29

What CN control the ocular muscles?

CN III
-CN IV
-CN VI

30

Which CN controls all ocular muscles except the lateral rectus and superior oblique?

CN III - Oculomotor nerve

31

What CN only controls the superior oblique muscle?

CN IV - Trochlear nerve

32

What does the Trochlear nerve control?

Superior oblique muscle

33

What does the Abducens nerve control?

Lateral rectus

34

What CN controls only the lateral rectus?

CN VI - abducens nerve

35

What are the muscles that CN III controls?

-superior rectus
-inferior rectus
-medial rectus
-inferior oblique

36

What muscle of the upper eyelid does CN III innervate?

Levator palpebrae superioris

37

What visceral motor control does CN III do?

Pupillary constrictors via the Pupillary sphincter and ciliary muscle

38

What is the only CN with contralateral symptoms in nuclear lesion? (Left nerve comes from the right nuclei)

CN IV - Trochlear nerve

39

What is the only CN to emerge from dorsal surface?

CN IV - Trochlear nerve

40

What is the function of the lateral rectus?

Abduction of the eye

41

What are the three branches of CN V?

-Ophthalmic V1
-Maxillary V2
-Mandibular V3

42

What does CN V innervate?

-Muscles of Mastication
-Oral floor muscles
-tensor tympani
-Tensor veli palatini

43

T/F Branches of other CNs join up with CN V

True

44

T/F CN V does sensation of the face, forehead, and tongue

True

45

The Trigeminal nerve does general sensory for what areas?

- Nasal mucosa
- Anterior 2/3 of tongue

46

What are the muscles of mastication?

-Temporalis
-Masseter
-Medial Pterygoid
-Lateral pterygoid

47

What are two visceral hitchhikers that join with CN V?

-CN VII on V2 and V3 to get to glands in the face
-CN IX on V3 to get to post. auricular to get to parotid gland

48

What are three branches that come from the Opthalmic branch of the Trigeminal nerve?

-Frontal nerve
-Nasocilliary nerve
-Lacrimal nerve (sensory only)

49

What are the branches that come from the maxillary branch of the trigeminal nerve?

-Posterior, Middle, Anterior superior alveolar nerves
-Infraorbital nerve
-Zygomatic nerve

50

What are the branches that come from the mandibular branch of the trigeminal nerve?

-Auriculotemporal nerve
-Buccal nerve
-Masseteric branch
-Deep temporal branch
-Pterygoid branches
-Masseteric branches
-Inferior alveolar nerve
-Lingual nerve

51

What nerve runs medial to the mandible?

The lingual nerve of the mandibular branch of the trigeminal nerve

52

What is it called when CN VII and the lingual nerve of CN V runs together?

Chorda Tympani

53

What are the functions of the Chorda tympani?

-Innervates glands (submandibular, sublingual)
-Taste on anterior 2/3 of tongue

54

What nerve runs within the mandible?

Inferior alveolar nerve of the mandibular branch of the trigeminal nerve

55

Which CN innervates the mylohyoid and anterior belly of the digastric?

Inferior alveolar nerve of the Mandibular branch of CN V

56

What nerve innervates the pulp of the teeth?

Inferior alveolar nerve of the Mandibular branch of CN V

57

What nerve innervates the skin and lips?

Mental nerve

58

What are the 5 main branches of CN VII?

-Temporal
-Zygomatic
-Buccal
-Cervical
-Posterior Auricular

59

What are 4 other branches that come off of the Facial nerve?

-Greater Petrosal nerve
-Chorda Tympani nerve
-Nerve to stapedius
-Branches to stylohyoid and posterior digastric

60

What does the greater petrosal nerve innervate?

Lacrimal and Nasal glands

61

What does the nerve to stapedius innervate?

Stapedius muscle

62

What does the main branch of CN VII run through?

Parotid gland

63

Does CN VII innervate the parotid gland?

No

64

What is unique about CN VIII?

It has only special sensory nerves

65

What do the vestibular senses of CN VIII do?

Help with proprioception

66

What are the motor functions of CN IX?

-Pharyngeal constrictors
-Stylpharyngeus
-Parotid gland

67

What are the sensory functions of CN IX the glossopharyngeal nerve?

-Posterior tongue
-Posterior oral pharynx
-Mucosa of middle ear
-Skin of external ear
-Tympanic membrane

68

What is the special sensory functions of CN IX?

Taste in posterior 1/3 of tongue
-Chem and Baro receptors (Carotid sinus)

69

What are the sensory functions of the Vagus nerve or CN X?

-Viscera in the abdomen and thorax
-Laryngopharynx and larynx
-Taste in epiglottis
-Ear and external acoustic meatus
-Post. Cranial fossa

70

What are the motor functions of CN X?

-Pharyngeal constrictors (along with CN IX)
-Laryngeal muscles

71

What are the special sense of CN X?

-Pressure receptors -Aortic arch
-Chemoreceptors - Aortic body

72

How does CN XI enter the skull?

Through the foramen magnum

73

Where does CN XI exit the skull?

jugular foramen

74

T/F
The hypglossal nerve is a motor only CN

True

75

What cranial nerves are special sensory only?

CN I
CN II
CN VIII

76

What CN are motor only nerves?

CN III
CN IV
CN VI
CN XI
CN XII

77

Which CN are mixed motor and sensory?

CN V
CN VII
CN IX
CN X