Cranial Nerves

Question 1

Nerve I

Answer 1

Olfactory nerve. Entirely sensory, connects olfactory bulbs from the nose to temporal lobe.

Question 2

Nerve II

Answer 2

Optic nerve. Entirely sensory, optic nerves from both eyes merge to form the optic chiasm.

Question 3

Nerve III

Answer 3

Occular nerve. Motor only, controls the eye muscle that moves the eyeballs.

Question 4

Nerve IV

Answer 4

Trochlear nerve. Motor only, controls the muscle that moves the eyeball. Superior oblique muscle

Question 5

Nerve V

Answer 5

Trigeminal. Largest cranial nerves, mixed with motor & sensation. 3 regions: ophthalmic, maxillary & mandibular.

Question 6

Nerve VI

Answer 6

Adbudcens. All motor only, controls the muscles that move the eyeball. Lateral rectus muscle.

Question 7

Nerve VII

Answer 7

Facial nerve. Mixed with motor & sensation. Control muscles of the face for facial expressions and for mastication.

Question 8

Nerve VIII

Answer 8

Vesitbulocochlear nerve. Sensory nerve. 2 branches: Vestibular- equilibrium, cochlear- hearing.

Question 9

Nerve IX

Answer 9

Glossopharyngeal nerve. Mixed cranial nerve. Sensory- taste buds, monitors BP and CO levels. Motor: Swallowing

Question 10

Nerve X

Answer 10

Vagus nerve. Mixed, motor: swallowing, vocalization and coughing. Sensory: sensation around the ear, some taste buds, sensory in the abdomen organs and thoracic region.

Question 11

Nerve XI

Answer 11

Spinal accessory nerve. Motor and sensory. Coordinates head movement by supplying the SCM & Trap

Question 12

Nerve XII

Answer 12

Hypoglossal nerve. Motor only. Supplies muscles of the tongue for moving & swallowing food.