Cranial Nerves

Question 1

Answer 1

Facial Nerve (CN VII)

Mixed Nerve

Motor to muscles of facial expression, taste to anterior two-thirds of tongue, motor to glands that produce tears, mucus and saliva. Sensory to part of face and mouth

Question 2

Answer 2

Oculomotor Nerve (CN III)

Motor nerve

Innervates four of six extrinsic eye muscles, elevates eyelid, constricts pupils, rounds lens of eye

Question 3

Answer 3

Hypoglossal Nerve (CN XII)

Motor nerve

Intrinsic and extrinsic tongue muscles

Question 4

Answer 4

Glossopharyngeal Nerve (CN IX)

Mixed nerve

Sensory and taste to posterior tongue, sensory to part of pharynx and others, stylopharyngeus muscle, secretions from parotid gland

Question 5

Answer 5

Trigeminal Nerve (CN V)

Mixed nerve

Sensory from anterior scalp, face, oral cavity, and others, muscles of mastication and others

Question 6

Answer 6

Olfactory Nerve (CN I)

Sensory nerve

Provides for sense of smell

Question 7

Answer 7

Vagus Nerve (CN X)

Mixed nerve

• Visceral sensory from heart, lungs, and abdominal organs
• General sensory from part of pharynx, larynx, others
• Most pharyngeal and all laryngeal muscles
• Smooth muscles and glands of heart, lungs, larynx, and most abdominal organs

Question 8

Answer 8

Trochlear Nerve (CN IV)

Motor Nerve

Innervates superior oblique eye muscle

Question 9

Answer 9

Accessory Nerve (CN XI)

Motor nerve

Innervates trapezius and sternocleidomastoid muscle, has a cranial and spinal component

Question 10

Answer 10

Optic Nerve (CN II)

Sensory Nerve

Provides for sense for sense of vision

Question 11

Answer 11

Vestibulocochlear Nerve (CN VIII)

Sensory Nerve

Provides for senses of hearing and balance

Question 12

Answer 12

Abducens Nerve (CN VI)

Motor Nerve

Innervates lateral rectus eye muscle