Anatomy Of The Orbit Flashcards
The orbit develops from ?
Mesenchyme by ossification
Laying down of bones in the orbit occur when?
6th to 7th week
When does the optic vesicle 170 degree apart rotate anteriorly?
6th-7th week
What is craniosynosotosis ?
This is a condition whereby the sutures of the head close a little to early or prematurely, not allowing proper growth and expansion of the skull
Examples of craniosynosotosis?
Brachycephaly
Oxycephaly
Scophocephaly
Trigonocephaly
What shape does the head of a brachycephalic patient take ?
The head is wide in proportion to the length
An child with Oxycephaly can be noticed by?
Tower like shape of head
The head with a shape resembling “the knee of a boat” is a characteristic of ?
Scophocephaly
Bones of the orbit are?
Ethmoid
Lacrimal
Maxillary
Sphenoid
Zygomatic
Frontal
Roof of the orbit comprises of ?
Lesser wing of sphenoid
Frontal bone
Bones of the orbit ?
Ethmoid , lacrimal , palatine , sphenoid, frontal,maxilla, zygomatic
Boundaries of the orbit ?
Roof , floor, sidewalls and orbital apex
2 components of the roof of orbit ?
Frontal bone
Lesser wing of sphenoid
Lacrimal gland fossa
Trochlear fossa
A rare congenital condition in which a portion of the brain protrudes through an opening in the skull ,resulting in a sac like structure filled with CSF is called what ?
Encenphalocele
Or orbital meningocele
Medial wall of the orbit comprises of ?
Body of sphenoid
Ethmoid
Lacrimal
Maxilla
