LEC52: 3D Orbit, Rule of 7

Question 1

identify the bones

Answer 1

frontal, lacrimal, sphenoid, ethmoid, maxilla, zygomatic, palatine

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Question 2

identify the muscles

Answer 2

Question 3

identify the bones

Answer 3

Question 4

identify the arteries

Answer 4

opthalmic artery branches, off internal carotid:

central artery of retina, posterior ciliaries, lacrimal, ethmoid, dorsal nasal, supraorbital, supratrochlear

Question 5

cranial nerves involved with eye orbit

Answer 5

II, III, IV, V1, V2, VI, VII

Question 6

CN for vision

Answer 6

CNII, optic n

Question 7

CN for eye muscles

Answer 7

CNIII, oculomotor

CNIV, trochlear = superior oblique

CNVI, abducens = lateral rectus

Question 8

CN for sensory orbit innervation

Answer 8

CNV₁, opthalmic division of trigeminal n

Question 9

CN for secretomotor innervation of orbit

Answer 9

CNV₂, maxillary division of trigeminal n

Question 10

function of zygomatic?

Answer 10

carries GVE fibers to lacrimal for tears

Question 11

CN of facial expression re: orbit

Answer 11

CNVII, facial n

orbicularis oculi