CN Nuclei/ Reflexes

Question 1

**Which 2 cranial nerves have their nuclei in the midbrain?

Answer 1

1. Occulomotor (III) and Trochlear (IV)

Question 2

**Which CNs have their nuclei in the pons?

Answer 2

5-8

Trigem, Abducens, Facial, Vestibulocochlear

Question 3

**Which CN have their nuclei in medulla?

Answer 3

9, 10, 12

Glosopharyngeal, vagus, hypoglossal

Question 4

Corneal reflex

Answer 4

afferent -> V1 (opthalmic)

efferent–> VII

Question 5

Jaw jerk

Answer 5

afferent–> V3 (sensory)

efferent–> V3 (motor)

Question 6

Pupillary

Answer 6

afferent–> CN II

efferent–> CN III

Question 7

Gag

Answer 7

afferent–> CN IX

efferent–> CN X

Question 8

What cranial nerves relay to Nucleus solitarius? what info?

Answer 8

VII, IX, X–> sensory info (taste, baroreceptor, gut distention)

Question 9

What CNs relay info to Nucleus Ambiguus? What info

Answer 9

IX, X–> motor info to pharynx, larynx, upper esophagus (swallowing, palate elevation)

Question 10

Dorsal motor nucleus function? CN associated?

Answer 10

Sends parasympathetics to heart, lungs an upper G.I. tract–> CN X

Question 11

biceps reflex

Answer 11

C5

Question 12

triceps reflex

Answer 12

C7

Question 13

patellar reflex

Answer 13

L4

Question 14

achilles tendon reflex

Answer 14

S1