Cranial Nerves

Question 1

I

Answer 1

Olfactory nerve; sensory, special sense of smell

Question 2

II

Answer 2

Optic nerve; sensory, special sense of vision

Question 3

III

Answer 3

Oculomotor nerve; motor and parasympathetic, motor to eye muscles and upper eyelid

Question 4

IV

Answer 4

Trochlear nerve; motor, motor to one eye muscle

Question 5

V

Answer 5

Trigeminal nerve;
sensory from scalp, forehead, nose, upper/lower eyelid, and cornea, sensory from palate, upper jaw, upper teeth and gums, nasal cavity, cheek;
motor: muscles of mastication, middle ear, throat;
greatest sensory function of all cranial nerves

Question 6

VI

Answer 6

Abducens nerve;

somatic innervates 1/6 of muscles responsible for eye movement

Question 7

VII

Answer 7

Facial nerve;
somatic, sensory, and parasympathetic;
all muscles of facial expression, a muscle in middle ear, 2 hyoid muscles;
sensory for taste;
parasympathetic salivary glands of mouth and lacrimal glands of eye

Question 8

VIII

Answer 8

Vestibulococchlear nerve;

sensory inner ear responsible for special senses of hearing and balance

Question 9

IX

Answer 9

Glossopharyngeal nerve;
somatic motor: 1 muscle of pharynx
sensory: taste
parasympathetic: trasmits from receptors in carotid arteries (blood pressure, CO2, O2, pH monitoring)

Question 10

X

Answer 10

Vagus nerve;
somatic motor: soft palate, pharynx, and larynx;
sensory: taste;
parasympathetic: regulates functions of thoracic and abdominal organs, carries fibers to heart and lungs and digestive organs

Question 11

XII

Answer 11

Hypoglossal nerve;

somatic motor: tongue muscles

Question 12

XI

Answer 12

Accessory nerve;
somatic motor: innervation to sternocleidomastoid and trapezius muscles
major component is spinal root