S5 CNs examplify

Question 1

which CN runs thru posterior triangle and is most susceptible to damage here?

Answer 1

accessory nerve

>denervation of trapezius muscle

Question 2

baroreceptor carotid sinus reflex

Answer 2

afferent- glossopharyngeal

efferent- vagus

Question 3

scalp arterial supply

Answer 3

mostly external carotid artery

and 2 branches from internal carotid

Question 4

which supplies muscles of mastication

Answer 4

Vc trigeminal

Question 5

which supplies muscles of facial expression

Answer 5

facial

Question 6

which vessels passes thru jugular foramen

Answer 6

internal jugular vein

Question 7

corneal reflex afferent and efferent limb

Answer 7

afferent - Va opthalmic trigeminal

efferent- facial nerve

Question 8

glossopharyngeal nerve derived from which pharyngeal arch

Answer 8

3

Question 9

list the pharyngeal arches and which CN is derived from each

Answer 9

1- trigeminal
2 - facial
3 - glossopharyngeal
4 - vagus (superior laryngeal)
6 - vagus (recurrent laryngeal)

Question 10

pharyngeal pouch

Answer 10

endoderm

separates internal part of the arch

Question 11

pharyngeal cleft/groove

Answer 11

exoderm

separates external part of the arch

Question 12

1st pharyngeal cleft gives rise to

Answer 12

external acoustic meatus

Question 13

what normally happens to the pharyngeal clefts

Answer 13

1st- EAM

2,3,4 > become pharyngeal arch

Question 14

what is brachial cyst

Answer 14

when pharyngeal cleft hasn’t been obliterated by the 2nd pharyngeal arch

• lateral aspect of neck
• along SCM