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Anatomy Written 2 > Orbit > Flashcards

Flashcards in Orbit Deck (26):
1

Base

Orbital Margins

2

Apex

Optic Canal

3

Superior Wall

Frontal, Lesser wing of sphenoid

4

Lateral Wall

Zygomatic, Greater wing of sphenoid

5

Medial Wall

Frontal, Lesser wing sphenoid, ethmoid, lacrimal

6

Inferior Wall

Maxilla, Zygomatic, Palatine

7

Conjunctiva

Transparent Mucous membrane

8

Palpebral

Eyelid

9

Bulbar

???

10

Tarsal Plates

Dense bands of CT, structure of eyelids

11

Tarsal Glands

Lipid secreting glands embedded in tarsal plates
Keep edges of eyelids from sticking together

12

Ciliary Glands

Sebaceous glands associated with eyelashes
Inflammation --> Sty

13

Orbital

Periorbita and meninges
Eyeball
Lacrimal Apparatus
Musculature
Innervation
Vasculature

14

Lacrimal Apparatus

Lacrimal Gland (CN 7)
Lacrimal Ducts
Canaliculus (in puncta)
Lacrimal Sac
Nasolacrimal Duct

15

Levator Palpebrae Superioris

CN 3
Superior tarsal muscle of Muller (symp innervation)

16

Superior Oblique

CN 4
Uses trochlea as sling to insert onto posterosuperior surface of sclera, below superior rectus

17

Inferior Oblique

CN 3
Only extrinsic muscle to originate from anterior orbit
Muscles run inferior to inferior rectus to insert onto posterinferior surface of sclera

18

Muscles originating from common tendinous ring and insert onto sclera

Superior Rectus (3)
Inferior Rectus (3)
Medial Rectus (3)
Lateral Rectus (6)

19

Autonomic Musculature

In iris
Sphincter pupillae = CN 3, para
Dilator pupillae = symp from cervical chain

20

Nerves

CN 2 - Optic Canal
CN 3 - SOF
CN 4 - SOF
CN 6 - SOF
CN V1 - nasociliary, frontal, lacrimal

21

Vasculature

Ophthalmic artery and vein

22

Diplopia

???

23

Internal Strabismus

CN 6

24

External Strabismus

CN 3

25

Mydriasis

CN 3 - para innervation

26

Ptosis

Levator Palpebrae - CN 3