Face and skull

Question 1

Motor innervation of face, general sensory

Answer 1

facial (VII), trigeminal (V)

Question 2

three divisions of trigeminal

Answer 2

v1=ophthalmic (forehead, orbit, nose), v2=maxillary, v3=mandibular

Question 3

course of facial nerve

Answer 3

stylomastoid foramen of temporal bone, enters parotid gland, spreads anteriorly to muscles of facial expression

Question 4

parts of orbic oculi

Answer 4

palpebral-blinking, orbital-forceful closure of eye

Question 5

danger space of scalp

Answer 5

loose ct area between galea aponeurotic and periosteum. (infected hair follicle below galea spreads widely, above stays localized)

Question 6

difference b/w dura in vertebral canal and cranium

Answer 6

no epidural space, dura is periosteum

Question 7

course of CSF

Answer 7

produced in ventricles of brain, flows to whrereever, absorbed in superior sagital sinus by arachnoid granulations

Question 8

dural sinuses

Answer 8

venous channels b/w layer of dura, converge on internal jugular

Question 9

middle meningeal artery will cause bleeding where? cerebral veins? which will show smooth contour on CT?

Answer 9

epidural; subdural. Epidural b/c its peeling dura away from bone. Medical emergency

Question 10

veins from eye and deep brain drain where? what else goes thru there?

Answer 10

cavernous sinus; nerves to orbit (and V1) and internal carotid