Cranial Nerves

Question 1

enumerate all 12 cranial nerves in order

Answer 1

CN I Olfactory
CN II Optic
CN III Oculomotor
CN IV Trochlear
CN V Trigeminal
CN VI Abducens
CN VII Facial
CN VIII Vestibulocochlear
CN IX Glossopharyngeal
CN X Vagus
CN XI Spinal Accessory
CN XII Hypoglossal

Question 2

sensory: sense of smell

Answer 2

CN I Olfactory

Question 3

sensory: sense of vision

Answer 3

CN II Optic

Question 4

motor: eye movement, pupil size, lens shape

Answer 4

CN III Oculomotor

Question 5

motor: eye movement (three CNs)

Answer 5

CN III Oculomotor, CN IV Trochlear, and CN VI Abducens

Question 6

sensory: sensation of the head and face including eyes and oral cavity
motor: middle ear muscle, mastication muscle for chewing, palatine muscle, and throat muscle

Answer 6

CN V Trigeminal

Question 7

sensory: sense of taste in the anterior 2/3 tongue
motor: facial expressions, submandibular and sublingual salivary glands of the mouth, lacrimal glands of the eye

Answer 7

CN VII Facial

Question 8

sensory: sense of hearing and balance

Answer 8

CN VIII Vestibulocochlear/Acoustic

Question 9

sensory: sense of taste in the posterior 1/3 tongue, tactile sensation of posterior tongue, middle ear, pharynx, sensory receptors from carotid arteries that monitor BP, blood pH, oxygen, and carbon dioxide levels
motor: swallowing, parotid salivary glands

Answer 9

CN IX Glossopharyngeal

Question 10

sensory: sensation in the larynx, neck, thorax, abdominal organs, sensory receptors in the aortic arch that monitor BP, blood pH, oxygen, and carbon dioxide levels
motor: muscles of palate, pharynx, larynx, lungs, kidneys, heart rate, and digestion

Answer 10

CN X Vagus

Question 11

motor: head and shoulder movement

Answer 11

CN XI Spinal Accessory

Question 12

motor: tongue movement

Answer 12

CN XII Hypoglossal