cranial nerves

Question 1

olfactory tract vs bulb vs nerves

Answer 1

tract is extension of brain surrounded by meninges. nerves are short and in epithelium.

Question 2

what does the left optic nerve convey? the left optic tract?

Answer 2

all info from left eye. All info from right field

Question 3

with what nerve do the presynaptic parasympathetics run for the ciliary and pupil constrictors?

Answer 3

III

Question 4

what nerves do the pre otic head somites turn into

Answer 4

3,4,6

Question 5

nerve 3 palsy

Answer 5

ptosis, dilated pupil, down and out

Question 6

list two trigeminal nerve disorders/complication

Answer 6

tic doloreaux (intense facial pain), herpes zoster (shingles)

Question 7

ptergopalatine fossa is the distribution pt for which nerve

Answer 7

V2

Question 8

postsynaptic parasympathetics running with V2

Answer 8

to nasal mucosa and lacrimal gland

Question 9

branches of v1

Answer 9

frontal, lacrimal, nasociliary; all general sensory

Question 10

innervation of lateral nasal walls and septum

Answer 10

anterior is v1, posterior is nasopalatine of v2

Question 11

functions of v3

Answer 11

general sensory of oral cavity and jaw, motor to muscles of mastication. parasymp (from 9) to parotid gland

Question 12

three branches of facial nerve. where does it divide?

Answer 12

w/in temporal bone. greater petrosal (carries parasymp to v2), chorda tympani (taste ant 2/3 and parasymp to v3, facial proper (motor)

Question 13

nervus intermedius

Answer 13

root of 7 for taste and parasympathetic pathways

Question 14

facial nerve proper distributione

Answer 14

temporal, zygomatic, buccal, mandibular, cervical

Question 15

palsy of facial nerve proper

Answer 15

bells palsy

Question 16

primordium of facial nerve and pretrematic branch. nerve 9? x?

Answer 16

arch 2, chorda tympani. arch 3, tympanic nerve. arches 4 and 6

Question 17

clinical test for nerve 9

Answer 17

gag reflex (innervates naso and oropharynx)

Question 18

functions of nerve 9

Answer 18

sensory to pharynx and middle ear, taste to post 1/3, special sensory to carotid body and sinus

Question 19

clinical test for vagus

Answer 19

say “aaah” (elevation of soft palate)

Question 20

functions of vagus

Answer 20

motor to pharynx (constrictors, soft palate, swallowing, coughing, vocal cords) and larynx

Question 21

accessory nerve palsy

Answer 21

SCM and trap. shoulder sags.

Question 22

primordia of XII

Answer 22

post-otic somites

Question 23

fxn of XII. clinical test?

Answer 23

tongue muscles. can’t protrude tongue on affected side (deviates to non-working side)

Question 24

what nerves leave superior orbital fissure

Answer 24

3,4,v1,6

Question 25

what nerves leave internal acoustic meatus

Answer 25

9,8

Question 26

what nerves leave jugular canal

Answer 26

9,10,11