lecture 8 - cranial nerves & their nuclei

Question 1

How many brainstem nuclei are there?

Answer 1

10

Question 2

What is the general pattern of distribution of brainstem nuclei, lateral to medial?

Answer 2

Sensory: special somatic, general somatic, general visceral (+ taste)
Motor: general visceral, branchial, general somatic

Question 3

Are sensory or motor brain stem nuclei more medial?

Answer 3

Motor (m for medial)

Question 4

What functions are the general somatic efferent nuclei associated with?

Answer 4

eye and tongue movements

Question 5

What functions are the branchial efferent nuclei associated with?

Answer 5

special skeletal muscles of the face for mastication, facial expression, shrugging shoulders, throat/larynx movements

Question 6

What functions are the general visceral efferent nuclei associated with?

Answer 6

pupil constriction, salivary gland excretion, thoracic/abdominal visceral motor supply

Question 7

What functions are the general visceral afferent nuclei associated with?

Answer 7

tongue and epiglottis sensation

Question 8

What functions are the general somatic afferent nuclei associated with?

Answer 8

face, mouth, pharynx and larynx sensation

Question 9

What functions are the special somatic afferent nuclei associated with?

Answer 9

auditory/vestibular function

Question 10

Which cranial nerves are pure somatic motor?

Answer 10

CNIV (trochlear, eye movements), CNXII (hypoglossal, tongue movements)

Question 11

Which cranial nerves are pure sensory?

Answer 11

CNI (olfactory, smell), CNII (optic, vision), CNVIII (vestibulocochlear, auditory/balance)

Question 12

Which cranial nerves are ‘mixed’ sensory and motor?

Answer 12

CNIII (oculomotor), CNV (trigeminal), CNVII (facial), CNIX (glossopharyngeal), CNX (vagus), CNXI (accessory)