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The skull can be divided into two parts.
Face and Cranium
The Cranium consists of 7 bones:
1. 2 Parietal bones 2. the occipital bone 3. 2 Temporal Bones 4. the sphenoid bone 5. the ethmoid bone
The face consists of 14 bones:
1. 2 Maxillary bones 2. 2 nasal bones 3. the vomer 4. two inferior conchae 5. two lacrimal bones 6. two palatine bones 7. two zygomatic 8. the mandible
What bone is part of both the cranium and the face
frontal bone
What is the prominence on the midline of occipital bone...
external occipital protuberance or (inion)
Why is the inion clinically important...
Inion is a useful landmark for placing electrodes on a patient for VEP.  Determines VA.
What are the two portions of the temporal bone:
squamous portion and petrous portion
What are the two processes that extend off the the bottom of the temporal bone?
Mastoid Process and Styloid Process
What passes through the stylomastoid foramen?
The facial cranial nerve (Nerve #7)
What passes through the carotid canal
internal carotid artery
What are the three names of the sphenoid piece that holds the pituitary gland?
1. Hypophyseal Fossa 2. Sella Turcica 3. Pituitary Fossa
What passes through the foramen rotundum?
maxillary cranial nerve
What passes through the foramen ovale?
mandibular cranial nerve
What passes through the foramen spinosum?
Middle meningeal artery
The medial walls are at what angle to each other?
Parallel
The lateral walls are at what anlge to each other?
90
The orbit is composed of seven bones:
frontal, maxillary, zygomatic, sphenoid, ethmoid, palatine, lacrimal
What shape is the orbital roof
triangle
What procedure is famous that deals with the thin bone layer of the roof
transorbital frontal lobotomy (through frontal bone)
What passes through the optic canal
optic nerve, opthalmic artery
What shape is the floor of the orbit
triangle
What passes throught the inferior orbital fissure?
1. maxillary nerve 2. infraorbital vessels 3. Ascending sphenopalatine ganglion  
What connects the inferior orbital fissure to the infraorbital forament?
infraorbital groove
What passes through the infraorbital foramen?
Infraorbital artery, vein, nerve
Where is the "weakest" orbital wall?
the floor
what is it called when you get hit with a baseball?
Blow-Out Fracture of the Orbit in the floor.
What shape is the medial wall?
rectangle
What holds the lacrimal sac?
lacrimal groove and lacrimal fossa which leads to nasolacrimal canal
What shape is the lateral wall
triangle
What passes through the superior orbital fissure?
1. Lacrimal Nerve 2. Frontal Nerve 3. Trochlear Nerve 4. Superior Opthalmic Vein 1. Oculomotor Nerve (Superior Division) 2. Nasociliary Nerve 3. Abducens Nerve 4. Oculomotoer Nerve (Inferior Division)
What is the circular tissue associated with SOF.
Common Tendinous Ring
What also is found in the common tendinous ring?
Optic Nerve and Opthalmic Artery
What passes through the  inferior orbital fissure
The maxillary division of the trigeminal nerve and inferior opthalmic vein
What passes through the inferior orbital fissure?
Inferior opthalmic vein adn infraorbital verve from maxillary nerve.
What are the 4 sinuses?
1. Frontal Sinus 2. Ethmoid Sinus 3. Sphenoid Sinus 4. Maxillary Sinus
What are the three names of the connective tissue that covers the orbit?
periorbita, orbital periosteum, orbital fascia
What is the strong barrier which helps prevent facial infections and is continuous with periorbita?
orbital septum
an inflammation/infection of the eye lid and periorbital soft tissues.
Preseptal Celluitis or Periorbital Cellulitis
An infection of the orbital connective tissue is a major infection that must be taken very seriousley
Orbital Cellulitis
What is the dense connective tissue that encases the globe and helps stop spread of disease
tenon's capsule
What makes up the orbital septum systems?
1. Periorbita 2. The fibrous septa 3. Common muscle sheath 4. Tenon's Capsule
What ist the secondary contraction muscle of eyelid?
Muller's muscle
What is a protrusion of the globe?
Exopthalmos
What happens to orbit in aging?
medial inferior area thins as well as paranasal sinuses.
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