Cranial Nerves (BIO 181-201)

Question 1

CN I

Olfactory

Answer 1

sensory

special sense of smell

Question 2

CN II

Optic

Answer 2

sensory

special sense of vision

Question 3

CN III
Oculomotor
Motor

Answer 3

4 of 6 intrinsic eye muscles: inferior, medial, superior, rectus, inferior oblique, and levator palpebrae superioris

Question 4

CN III
Oculomotor
Parasympathetic

Answer 4

• autonomic

- smooth muscle of eye, circular muscle (pupil size), ciliary muscles (lens shape)

Question 5

CN IV

Trochlear

Answer 5

motor

1 of 6 superior oblique muscle

Question 6

CN V
Trigeminal
Sensory Maxillary Branch

Answer 6

palate, upper jaw, upper teeth and gums, nasopharynx, nasal cavity, skin, lower eyelid, upper lip

Question 7

CN V
Trigeminal
Sensory Ophthalmic Branch

Answer 7

Scalp, forehead, nose, upper eyelid, cornea

Question 8

CN V
Trigminal
Sensory and Motor Mandibular Branch

Answer 8

• sensory: lower jaw and teeth, gums, anterior tongue, lower lip, skin of cheek, chin, auricle, and temporal
• motor: mastication muscle, soft palate, throat, middle ear

Question 9

CN VI

Abducens

Answer 9

• motor

- 1 of 6 extrinsic eye muscle: lateral rectus muscle

Question 10

CN VII
Facial
Sensory

Answer 10

Sense of taste from tongue, 2/3 tongue, external ear, palate

Question 11

CN VII
Facial
Motor

Answer 11

facial expression, throat, and middle ear

Question 12

CN VII
Facial
parasympathetic

Answer 12

submandibular and sublingual salivary glands, lacrimal glands, and glands of nasal cavity and palate

Question 13

CN VIII

Vestibulocochlear

Answer 13

sensory

special hearing and balance senses

Question 14

CN IX
glossopharyngeal
sensory

Answer 14

sense of taste from posterior 1/3 of tongue, middle ear, carotid sinus, carotid body

Question 15

CN IX
Glossopharyngeal
motor

Answer 15

pharyngeal muscles

Question 16

CN IX
Glossopharyngeal
parasympathetic

Answer 16

parotid salivary gland, glands of the posterior 1/3 of tongue

Question 17

CN X
Vagus
Sensory

Answer 17

inferior pharynx, larynx, thoracic and abdominal organs, sense of taste from posterior of tongue

Question 18

CN X
Vagus
Motor

Answer 18

soft palate, pharynx, intrinsic laryngeal muscle, extrinsic tongue muscle

Question 19

CN X
Vagus
parasympathetic

Answer 19

ALL thoracic and abdominal viscera

Question 20

CN XI

Accessory

Answer 20

• motor

- soft palate, pharynx, sternocleidomastoid, trapezius muscles

Question 21

CN XII

Hypoglossal

Answer 21

• motor

- intrinsic and extrinsic tongue and throat muscles