P8 ANATOMY DEMO

Question 1

The orbital roof formed from

Answer 1

orbital plate of the frontal bone and the
lesser wing of the sphenoid bone

Question 2

name the 3 bone that make up the orbital floor

Answer 2

• maxillary
• palatine
• orbital plate of zygomatic

Question 3

main symptom of blow out fracture

Answer 3

diplopia

Question 4

lateral orbital wall is made of

Answer 4

• Zygomatic
  –Greater wing of the
  sphenoid

Question 5

medial orbital wall is made of

Answer 5

Frontal process of the maxillary
– Lacrimal
–Orbital plate of the ethmoidal
– Lesser wing of the sphenoid

Question 6

contents of supraorbital notch

Answer 6

supraorbital nerve
- blood vessels

Question 7

contents of infraraorbital groove

Answer 7

intra-orbital nerve & blood vessels

Question 8

contents of inferior orbital groove

Answer 8

maxillary nerve & its zygomatic branch
- inf. ophthalmic vein & sympathetic nerves

Question 9

contents of superior orbital groove

Answer 9

lacrimal nerve
frontal nerve
trochlear nerve
oculomotor nerve
abducents nerve
nasociliary nerve, and the superior
ophthalmic vein

Question 10

infra-orbital nerve is continuation of which nerve

Answer 10

maxillary nerve

Question 11

contents of optic canal

Answer 11

• optic nerve
• ophthalmic artery

Question 12

contents of nasolacrimal canal

Answer 12

nasolacrimal duct

Question 13

lateral rectus muscle is innervated by

Answer 13

Abducens nerve

Question 14

Superior oblique muscle in innervated by

Answer 14

Trochlear nerve

Question 15

upon contraction of superior oblique muscle , what is the eye movement observed

Answer 15

pupil directed down and outwards

Question 16

upon contraction of superior rectus muscle , what is the eye movement observed

Answer 16

pupil pulled up and inwards

Question 17

what is the epithelium of the cornea

Answer 17

Stratified squamous non-keratinized epithelium

Question 18

thin layer of collagen fibers contributes to the stability & strength of cornea

Answer 18

bowman’s membrane

Question 19

Tough opaque part covering post 5/6 of eye ball

Answer 19

sclera

Question 20

Transparent part covering 1/6 part of eye ball

Answer 20

cornea

Question 21

thick homogeneous structure composed of fine collagenous filaments

Answer 21

Descemet’s membrane

Question 22

the endothelium of cornea is composed of

Answer 22

Simple squamous epithelium

Question 23

innervation of cornea is via

Answer 23

CN 4 / ophthalmic branch of trochlear nerve

Question 24

large gelatinous material in post. 4/5 of eyeball that acts as shock absorber

Answer 24

vitreous body