Cranial Nerves

Question 1

Olfactory (I)

Answer 1

Sensory - nose (smell)

Question 2

Optic (II)

Answer 2

Sensory - eye (vision)

Question 3

Oculomotor (III)

Answer 3

Motor - eye muscles (voluntary eye movements)

Question 4

Trochlear (IV)

Answer 4

Motor - superior oblique muscle (voluntary eye movements; depresses eye & turns laterally)

Question 5

Trigeminal (V)

Answer 5

Sensory - ophthalmic, maxillary
mandibular (sensation of face)

Motor - muscles of mastication (mandibular nerve)

Question 6

Abducens (VI)

Answer 6

Motor - external/lateral rectus muscle (voluntary eye movements; moves eye laterally)

Question 7

Facial (VII)

Answer 7

Sensory - anterior 2/3 of tongue
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Motor - muscles of face

Question 8

Vestibulocochlear (VIII)

Answer 8

Sensory - inner ear (vestibular branch - balance; cochlear branch - hearing sounds)

Question 9

Glossopharygneal (IX)

Answer 9

Sensory - posterior 1/3 of tongue, tonsil, pharynx, eardrum

Motor - pharyngeal musculature (sylopharyngeus muscle: swallowing) & parotid salivary glands

Question 9

Vagus (X)

Answer 9

Sensory - internal organs of thoracic & abdominal cavities (heart, lungs, bronchi, trachae, larynx, GI tract, diaphragm); pharynx; external ear (external acoustic meatus)

Motor - heart, lungs, bronchi, GI tract (autonomic motor fibers to internal organs); palate & pharynx (motor fibers)

Question 10

Accessory (XI)

Answer 10

Motor - sternocleidomastoid & trapezius

originates from spinal cord

Question 11

Hypoglossal (XII)

Answer 11

Motor - muscles of tongue