Cranial Nerves

Question 1

Olfactory nerve

Answer 1

I. sensory nerve for smell from nasal cavity

Question 2

Optic Nerve

Answer 2

II. Sensory nerve for vision from retina

Question 3

Oculomotor nerve

Answer 3

III. Motor nerve to 4 of the 6 extrinsic eye muscles

Parasympathetic nerve to iris and ciliary muscles

Question 4

Trochlear Nerve

Answer 4

IV. Motor nerve to 1 of the 6 extrinsic eye muscles

Question 5

Trigeminal nerve

Answer 5

V. Three major Divisions;

• Ophthalmic: Sensory nerve from upper third of the face
• Maxillary Division: Sensory nerve from middle third of the face and upper teeth
• Mandibular Division: Sensory nerve from lower third of face and lower teeth
• Motor Nerve to muscles of mastication

Question 6

Abducens nerve

Answer 6

VI. Motor nerve to 1 of the 6 extrinsic eye movements

Question 7

Facial Nerve

Answer 7

VII. -Sensory nerve from taste buds

• Motor nerve to muscles of facial expression
• Parasympathetic nerves to lacrimal, nasal, and most salivary glands

Question 8

Vestibulocochlear nerve

Answer 8

VIII. Sensory nerve for hearing and balance from inner ear

Question 9

Glossopharyngeal nerve

Answer 9

IX. -Sensory nerve from posterior tongue and pharynx and some taste buds

• Motor nerve to muscles involved in swallowing
• Parasympathetic nerve to one salivary gland

Question 10

Vagus Nerve

Answer 10

X. -Sensory nerve from thoracic and abdominal organs

-Parasympathetic nerve to thoracic and abdominal organs

Question 11

Accessory Nerve

Answer 11

XI. - Motor nerve to muscles of larynx and pharynx, trapezius and sternocleidomastoid muscles

Question 12

Hypoglossal nerve

Answer 12

XII. Motor nerve of tongue