CN IX, X, XI, XII DSA

Question 1

SVE of IX

Answer 1

to stylopharyngeus m.

nucleus ambiguus

Question 2

GVE-P of IX

Answer 2

PS to parotid

salivatory nucleus

Question 3

GSA of IX

Answer 3

sensation of middle ear, external ear, posterior 1/3 tongue

descend nucleus of V and VTT

Question 4

SVA of IX

Answer 4

taste - posterior 1/3 tongue

solitary nucleus

Question 5

GVA of IX

Answer 5

carotid body and sinus

solitary nucleus

Question 6

IX exits skull

Answer 6

jugular foramen

Question 7

lesser petrosal nerve

Answer 7

PS from IX

-to otic ganglion > parotid gland

Question 8

SVE of X

Answer 8

pharyngeal and laryngeal muscles

nucleus ambiguus

Question 9

GVE-P of X

Answer 9

PS to heart, lung, GI to splenic flexure

dorsal motor nucleus of X

Question 10

GSA of X

Answer 10

sensation from pharynx, meninges, external ear

descending nucleus of V

Question 11

SVA of X

Answer 11

taste from epiglottis

solitary nucleus

Question 12

GVA of X

Answer 12

chemoreceptor and baroreceptors of aortic arch

solitary nucleus

Question 13

GSE of XI

Answer 13

sternocleidomastoid and trapezius m.

spinal accessory nucleus

Question 14

recurrent laryngeal nerve fibers

Answer 14

travel with CN XI briefly

Question 15

palate innervation UMNs

Answer 15

contralateral

Question 16

palatoglossal innervation

Answer 16

CN X

Question 17

UMN CN XII lesion

Answer 17

tongue deviates opposite side of lesion

fasciculation of tongue
no atrophy

Question 18

LMN CN XII lesion

Answer 18

tongue toward side of lesion

flaccid paralysis
atrophy on affected side

Question 19

GSE of XII

Answer 19

intrinsic muscles of tongue

hypoglossal nucleus