Cranial Nerves

Question 1

Olfactory. Number, Location, one function?

Answer 1

• (I)
• cribiform plate of ethmoid bone
• sensory for smell

Question 2

Optics. Number, location, one function? -

Answer 2

• (II)
• Big x on underside of cerebrum from retina to thalamus
• Sensory for sight

Question 3

Oculomotor. Number, location, one function

Answer 3

• (III)
• midbrain to muscles deep to eyeball
• Motor for eye movement

Question 4

Trochlear. Number, location, one function

Answer 4

• (IV)
• Lateral midbrain (very small)
• motor for eye movement

Question 5

Trigeminal. Number, location, one function

Answer 5

• (V)
• originates in pons, branches throughout face
• Both sensory of the face and motor for muscles of mastication (chewing)

Question 6

Abducens. Number, location, one function

Answer 6

• (VI)
• originates in pons, to eyeballs
• motor for eye movement

Question 7

Facial. Number, location, one function

Answer 7

• (VII)
• Originates in pons, branches throughout the face
• Sensory for taste, motor for moving muscles of the face; motor for making tears and saliva

Question 8

Vestibulocochlear. Number, location, one function

Answer 8

• (VIII)
• Ear
• sensory for sound and balance

Question 9

Glossopharyngeal. Number, location, one function

Answer 9

• (IX)
• Originates in the medulla to tongue and carotid sinus
• both: sensory for taste and blood pressure. motor for swallowing.

Question 10

Vagus. Number, location, one function

Answer 10

• (X)
• Originates in medulla oblongata, goes everywhere
• vagus to the viscera: Both sensory for visceral sensation and motor to smooth and cardiac muscle

Question 11

Accessory. Number, location, one function

Answer 11

• (XI)
• originates in medulla goes to sternocleidomastoid and trapezius
• mostly motor to muscles of neck and back, swallowing, and moving head -

Question 12

Hypoglossal. Number, location, one function -

Answer 12

• (XII)
• medulla to tongue
• motor for the tongue ____