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Flashcards in Cranial Nerves Deck (76):
1

Name CN I and state whether the nerve is sensory, motor or both.

Oflactory. Sensory.

2

Name CN II and state whether the nerve is sensory, motor or both.

Optic. Sensory.

3

Name CN III and state whether the nerve is sensory, motor or both.

Oculomotor. Motor and parasympathetic.

4

Name CN IV and state whether the nerve is sensory, motor or both.

Trochlear. Motor.

5

Name CN V and state whether the nerve is sensory, motor or both.

Trigeminal. Sensory and motor.

6

Name CN VI and state whether the nerve is sensory, motor or both.

Abducens. Motor.

7

Name CN VII and state whether the nerve is sensory, motor or both.

Facial. Sensory, motor and parasympathetic.

8

Name CN VIII and state whether the nerve is sensory, motor or both.

Vestibulocochlear. Sensory.

9

Name CN IX and state whether the nerve is sensory, motor or both.

Glossopharyngeal. Sensory, motor and parasympathetic.

10

Name CN X and state whether the nerve is sensory, motor or both.

Vagus. Sensory, motor and parasympathetic.

11

Name CN XI and state whether the nerve is sensory, motor or both.

Accessory. Motor.

12

Name CN XII and state whether the nerve is sensory, motor or both.

Hypoglossal. Motor.

13

Name the structure(s) innervated and the function of CN I.

Olfactory epithelium innervated. Olfaction.

14

Name the structure(s) innervated and the function of CN II.

Retina innervated. Vision and the pupillary light reflex.

15

Name the structure(s) of motor innervation and the function of CN III.

Motor innervation: superior rectus, inferior rectus, middle rectus and inferior oblique (for eye movements). Levator palpebrae superioris (for elevation of upper eyelid).

16

Name the structure(s) of parasympathetic innervation and the function of CN III.

Parasympathetic innervation: sphincter papillae and ciliary muscle of the eyeball for pupillary constriction and accommodation.

17

Name the structure(s) innervated and the function of CN IV.

Superior oblique muscle innervated. Movement of the eyeball (depression, abduction, intorsion).

18

Name the structure(s) of sensory innervation and the function of CN V.

Sensory innervation of face, scalp, cornea, nasal and oral cavities providing general sensation.

19

Name the structure(s) of motor innervation and the function of CN V.

Motor innervation of muscles of mastication for opening and closing the mouth. Motor innervation of tensor tympani for tension on tympanic membrane.

20

Name CN V1 and provide function.

The ophthalmic branch of the trigeminal nerve provides sensation to the anterior head and superior 1/3 of the face (scalp, forehead, cornea and nose tip). 

21

Name CN V2 and provide function.

The maxillary branch of the trigeminal nerve provides sensation to the middle 1/3 of the face (cheek, nose, upper lip, upper teeth and palate). 

22

Name CN V3 and provide function.

The mandibular branch of the trigeminal nerve provides sensation to the inferior 1/3 of the face (lower lip, lower teeth, chin and jaw), anterior 2/3 of the tongue and motor control to muscles of mastication and the tensor tympani.

23

Name the structure(s) innervated and the function of CN VI.

Lateral rectus muscle innervated for movement of the eyeball (abduction).

24

Name the structure(s) innervated and the function of CN VII.

Sensory innervation: anterior 2/3 of the tongue for taste. Motor innervation: muscles of facial expression for facial movements. Parasympathetic innervation: salivary and lacrimal glands for salivation and lacrimation.

25

Name the structure(s) innervated and the function of CN VIII.

Vestibular apparatus innervated for sensation of position and movement of the head. Cochlea innervated for hearing.

26

Name the structure(s) of sensory innervation and the function of CN IX.

Sensory innervation of pharynx, posterior 1/3 of the tongue, Eustachian tube and middle ear for general sensation. Sensation of posterior 1/3 of tongue, carotid body and carotid sinus for taste, chemoreception and baroreception.

27

Name the structure(s) of motor innervation and the function of CN IX.

Motor innervation of stylopharyngeus muscle for swallowing.

28

Name the structure(s) of parasympathetic innervation and the function of CN IX.

Parasympathetic innervation of parotid salivary gland for salivation.

29

Name the structure(s) of sensory innervation and the function of CN X.

Sensory innervation of pharynx, larynx, trachea and oesophagus for general sensation. Sensory innervation of thoracic and abdominal viscera (for visceral sensation), the aortic bodies and the aortic arch (for chemoreception and baroreception).

30

Name the structure(s) of motor innervation and the function of CN X.

Motor innervation of the soft palate (for swallowing), pharynx, larynx (to generate voice) and oesophagus.

31

Name the structure(s) of parasympathetic innervation and the function of CN X.

Parasympathetic innervation of the thoracic and abdominal viscera (innervation of cardiac muscle, smooth muscle, respiratory tracts and GI tracts).

32

Name the structure(s) innervated and the function of CN XI.

Sternocleidomastoid muscle innervated to flex head and neck. Trapezius muscle innervated for movement of shoulders.

33

Name the structure(s) innervated and the function of CN XII.

Intrinsic and extrinsic muscles of the tongue innervated for movement of the tongue.

34

What is the skull exit point for CN I?

Cribriform plate.

35

What is the skull exit point for CN II?

Optical canal.

36

What is the skull exit point for CN III?

Superior orbital fissure.

37

What is the skull exit point for CN IV?

Superior orbital fissure.

38

What is the skull exit point for CN V1?

Superior orbital fissure.

39

What is the skull exit point for CN V2?

Foramen rotundum.

40

What is the skull exit point for CN V3?

Foramen ovale.

41

What is the skull exit point for CN VI?

Superior orbital fissure.

42

What is the skull exit point for CN VII?

Internal acoustic meatus.

43

What is the skull exit point for CN VIII?

Internal acoustic meatus.

44

What is the skull exit point for CN IX?

Jugular foramina.

45

What is the skull exit point for CN X?

Jugular foramina.

46

What is the skull exit point for CN XI?

Jugular foramina.

47

What is the skull exit point for CN XII?

Hypoglossal canal.

48

Identify the foramina highlighted. 

Q image thumb

Jugular foramen (right). 

49

Identify the foramina highlighted. 

Q image thumb

Hypoglossal canal (right). 

50

Identify the foramina highlighted. 

Q image thumb

Superior orbital fissure. 

51

Identify the foramina highlighted. 

Q image thumb

Foramen rotundum (right). 

52

Identify the foramina highlighted. 

Q image thumb

Optic canal (right). 

53

Identify the foramina highlighted. 

Q image thumb

Foramen ovale (right). 

54

Identify the exit point highlighted. 

Q image thumb

Cribriform plate. 

55

Identify the foramina highlighted. 

Q image thumb

Internal acoustic meatus (right). 

56

The olfactory nerve comes through the cribriform plate and passes into the _____ of the ________ lobe. 

Uncus of the temporal lobe. 

57

The fibres of the optic nerve are closesly related to what?

The lateral geniculate body. 

58

Is pupil dilation are symapthetic or parasympathetic process?

Sympathetic (pupillary constriction is part of the parasympathetic nervous system). 

59

Damage to which nerve will result in double vision when the patient looks down?

Trochlear nerve. 

60

Trigeminal afferents meet where?

Meckel's cave. 

61

Give symptoms of trigeminal neuralgia. 

Damage to the sensory ganglion results in numb face and false inputs to the trigeminal nuclei resulting in spontaneous firing which results in pain inside the face. 

62

The trigeminla nerve runs through which sinus?

Cavernous sinus. 

63

What is the most common lesion of the facial nerve?

Bell's palsy. 

64

Inflammatio of the ______ gland will cause facial palsy. 

Parotid gland (which the facial nerve passes through). 

65

Where does the vagus nerve emerge from?

The medulla. 

66

How does the vagus nerve effect heart rate and blood pressure on stimulation?

Decreases both heart rate and blood pressure. 

67

Hoarsness of voice is a sign of vocal cord paralysis caused by damage to which derivative of the vagus nerve?

The recurrent laryngeal nerve, which supplies all intrinsic muscles of the larynx (except cricothyroid). 

68

The palate fails to rise when the patient says "ah". What is this a sign of?

Bilateral lesions of the vagus nerve. 

69

Absence of a gap reflex suggests what?

Lesion in the glossopharyngeal or vagus nerves. 

70

How is paralysis of the sternocleidomastoid muscle tested?

If there if difficulty rotating the head against resistance. Difficulty arises when rotating the head to the side opposite the lesion. 

71

How is paralysis of the trapezius tested?

Inability of the patient to shrug their shoulders against resistance. 

72

Paralysis of the sternocleidomastoid and trapezius muscles occurs on which side of the lesion to the accessory nerve?

The same side. 

73

Damage to the hypoglossal nerve will cause paralysis of which half of the tongue?

The ipsilateral half (same side). Licks the lesion. 

74

The posterior third of the tongue is supplied by which nerve(s)?

Glossopharyngeal (CN IX). 

75

The anterior third of the tongue is supplied which nerve(s)?

Mandibular branch of trigeminal nerve (CN V3). 

Facial nerve (CN VII). 

76

Which structures pass through the cavenrous sinus?

Oculomotor nerve. 

Trochlear nerve. 

Opthalmic branch of the trigeminal nerve. 

Maxillary branch of the trigeminal nerve. 

Internal carotid artery. 

Abducens nerve. 

Trochlear nerve.