Anatomy 1
List the 8 cranial bones
frontal
2 parietal
2 temporal
occipital
sphenoid
ethmoid
depression at ridge of nose; junction of frontal and nasals
nasion
OML
OML- Orbitomeatal Line (Radiographic baseline)
Between the Frontal and Parietals
coronal
In what position are the petrous ridges filling the orbits?
PA
raised area between eyebrows
glabella
The _________ bones house the organs of hearing and balance in their Petrous Portion.
temporal
IOML
Degree of difference between OML and IOML?
IOML- Infraorbitomeatal Line
Between Parietal and temporal (L and R)
squamosal
For the Townes Projection:
Angle CR _____° caudad to OML, or _____° caudad to IOML
30 or 37
skull floor consists of:
2 temporal
sphenoid
ethmoid
Which cranial bone is the optic foramen located?
sphenoid
small flap of cartilage projecting over the EAM
tragus
Between Parietals and Occipital
lambdoidal
Centering point for lateral skull
2 in above EAM
which cranial bone is associated with the foramen magnum?
occipital
the most dense portion of the skull
petrous pyramids
AML
AML- Acanthiomeatal Line
Junction where frontal and parietals meet; at anterior end of Sagittal suture
Bregma
Petrous pyramids are projected into the lower one-third of the orbits.
caldwell
thinnest and most easily fractured skull bone
squamous portion of temporal bone
Which cranial bone articulates with all 7 other cranial bones?
sphenoid
Mentum
chin
5 errors of skull radiography
Tilt (most common)
Rotation (most common)
Excessive flexion
Excessive extension
Incorrect CR
Sella turcica, dorsum sellae, and clinoids in profile.
lateral