Cranial nerves

Question 1

Somatic motor

Answer 1

to striated muscles in the orbit, tongue, and external neck as well as striated muscles in the face, palate, pharynx, and larynx

Question 2

Where do the muscles of the face, palate, pharynx, and larynx derive from?

Answer 2

pharyngeal arches

Question 3

Visceral motor

Answer 3

to glands and involuntary smooth muscle in the viscera and blood vessels

Question 4

Somatic (general) sensory

Answer 4

transmit general sensation (touch, pressure, heat, cold)

Question 5

Visceral (general) sensory

Answer 5

convey sensation from viscera (from carotid body and sinus, pharynx, larynx, trachea)

Question 6

Special sensory

Answer 6

convey taste and smell
serve the special senses of vision, hearing, and balance

Question 7

Exclusively sensory nerves

Answer 7

I
II
VII (8)

Question 8

Exclusively motor nerves

Answer 8

III
IV (4)
VI (6)
XI (11)
XII (12)

Question 9

Mixed

Answer 9

V (5)
VII (7)
IX (9)
X (10)

Question 10

Olfactory nerve

Answer 10

CN I
Special sensory- smell
Exit via cribriform plate of ethmoid bone

Question 11

Optic nerve

Answer 11

CN II
special sensory- sight
R and L fibers merge at optic chiasm
Exits via optic canals

Question 12

Oculomotor nerve

Answer 12

CN III
somatic motor- to extraocular muscles
visceral motor- constricts the pupil and accommodates the lens
exits via superior orbital fissure

Question 13

Trochlear nerve

Answer 13

CN IV
Somatic motor- to superior oblique muscle
exits via superior orbital fissure

Question 14

Abducent nerve

Answer 14

CN VI
Somatic motor- to lateral rectus muscle
exits via superior orbital fissure

Question 15

Trigeminal nerve

Answer 15

CN V

Question 16

CN V1

Answer 16

Ophthalmic division
general sensory from skin of forehead, external nose, and philtrum of upper lip
exits via supraorbital fissure

Question 17

CN V2

Answer 17

Maxillary division
general sensory from skin of face overlying the maxilla, nasal cavity, upper teeth, and palate
exits via foramen rotundum

Question 18

CN V3

Answer 18

Mandibular division
General sensory from skin over mandible, lower lip, and TMJ
Brachial motor to muscles of mastication
exits via foramen ovale

Question 19

Facial nerve

Answer 19

CN VII
special sensory (taste)- from anterior 2/3 of tongue
brachial motor- to muscles of facial expression: exits via stylomastoid foramen
visceral motor- to lacrimal gland, nasal, and palatine mucosal glands, submandibular and sublingual salivary glands
Exits via internal acoustic meatus

Question 20

Vestibulocochlear nerve

Answer 20

CN VIII
special sensory- hearing and equilibrium
exits via internal acoustic meatus

Question 21

Glossopharyngeal nerve

Answer 21

CN IX
Brachial motor- muscle of pharynx
visceral motor- parotid gland
special sensory- taste from posterior 1/3 of tongue
visceral sensory- from carotid body and sinus
exits via jugular foramen

Question 22

Vagus nerve

Answer 22

CN X
brachial motor- to muscles of pharynx, larynx, and palate
visceral motor- to thoracic and abdominal organs
somatic sensory- from skin of posterior ear and external auditory canal
special sensory- taste from epiglottis and root of tongue
visceral sensory- from inferior pharynx and larynx mucosa, thoracic and abdominal viscera
exits via jugular foramen

Question 23

Spinal accessory nerve

Answer 23

CN XI
somatic motor- to trapezius and sternocleidomastoid muscles
exits via jugular foramen

Question 24

Hypoglossal nerve

Answer 24

CN XII
somatic motor- muscles within the tongue and those that attach to it
exits via hypoglossal canal

Question 25

CN III, VII, IX

Answer 25

synapse in one of 4 head ganglia and innervate portions of the eye, lacrimal gland, nasal mucosa, and salivary glands

Question 26

CN X

Answer 26

thru one of many autonomic plexi, synapse in an intramural ganglion in the wall of the target organ

Question 27

Sacral outflow (S2, S3, and S4)

Answer 27

thru the inferior hypogastric plexus and synapse in an intramural ganglia in the wall of the target organ