Structure of skull
Types of sinuses
Name the bones in the orbit
name the bones, sutures or fissures
describe the orbit
4 quarters:
roof-
floor ( thin) - maxilla, zygomatic, palatine ( inf orbital fissure)
lateral wall ( thickest cause most impact) - zygomatic, sphenoid ( sup orbital fissure)
medial wall- maxilla, lacrimal, ethmoid, sphenoid
40mm^3
Eye covers 1/5 of it
describe the orbital cavity
Describe the optic canal
lesser wing of sphenoid bone
Transmits optic nerve and opthalmic artery
Bones, landmarks and characteristics of the orbit roof
Frontal + Sphenoid
Thin
Develop holes with age
Landmarks
Lac fossa = depression for lac gland
Trochlear fossa
Supraorbital notch = groove for supraorbital nerve
Bones, characteristics and landmark of medial wall
Maxilla
Lacrimal
Ethmoid
Sphenoid
Palatine
Very thin
Lac groove= depression for nasolac duct
Bones, characteristics and landmarks of lat wall
Zygomatic
Thickest wall
Landmark
Superior orbital fissure
Marginal tubercule
Lock wood lig
Whitnall lig
Bones, characteristics and landmarks of orbit floor
Inf orbital fissure
Infraorb groove
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