Cranial Nerves (Function)

Question 1

Define dysarthria

Answer 1

Difficult or unclear articulation of speech

Question 2

Define dysphagia

Answer 2

Difficulty swallowing

Question 3

What does CN 3 do?

Answer 3

Constricts pupil; accomodates lens, innervates medial, superior, inferior recti, inferior oblique, and levator palpebrae

Question 4

What does CN 4 do?

Answer 4

Innervates superior oblique

Question 5

What does CN 5 do?

Answer 5

Sensation to face and anterior scalp, mucous membranes, dura, and innervates muscles of mastication

Question 6

What does CN 6 do?

Answer 6

Innervates lateral rectus

Question 7

What does CN 7 do?

Answer 7

Innervates muscles of facial expression, lacrymal and salivary glands, stapedius, taste to anterior 2/3s of the tongue, and sensation to the external ear

Question 8

What does CN 8 do?

Answer 8

Vestibular: head position, angular and linear acceleration

Cochlear: heading

Question 9

What does CN 9 do?

Answer 9

Innervates muscles of swallowing; parotid gland; taste to posterior 1/3 of tongue and pharynx, carotid body; and sensation to external ear

Question 10

What does CN 10 do?

Answer 10

Innervates the muscles of swallowing; larynx; parasympathetic innervation to heart, lungs, and viscera to splenic flexure; and sensation to external ear

Question 11

What does CN 11 do?

Answer 11

Innervates sternocleidomastoid and trapezius

Question 12

What does CN 12 do?

Answer 12

Innervates intrinsic muscles of the tongue