Skull

Anatomy 1

100

List the 8 cranial bones

frontal

2 parietal

2 temporal

occipital

sphenoid

ethmoid

200

raised area between eyebrows

glabella

300

skull floor consists of:

2 temporal

sphenoid

ethmoid

400

which cranial bone is associated with the foramen magnum?

occipital 

500

thinnest and most easily fractured skull bone

squamous portion of temporal bone

Anatomy 2

100

depression at ridge of nose; junction of frontal and nasals

nasion

200

The _________ bones house the organs of hearing and balance in their Petrous Portion.

temporal

300

Which cranial bone is the optic foramen located?

sphenoid

400

the most dense portion of the skull

petrous pyramids

500

Which cranial bone articulates with all 7 other cranial bones?

sphenoid

Positioning Lines/Landmarks

100

OML

OML- Orbitomeatal Line (Radiographic baseline)

200

IOML

Degree of difference between OML and IOML?

IOML- Infraorbitomeatal Line

300

small flap of cartilage projecting over the EAM

tragus

400

AML

AML- Acanthiomeatal Line

500

Mentum

chin

sutures

100

Between the Frontal and Parietals

coronal

200

Between Parietal and temporal (L and R)

squamosal

300

Between Parietals and Occipital

lambdoidal

400

Junction where frontal and parietals meet; at anterior end of Sagittal suture

Bregma

500

5 errors of skull radiography

Tilt (most common)

Rotation (most common)

Excessive flexion

Excessive extension

Incorrect CR

positioning

100

In what position are the petrous ridges filling the orbits?

PA

200

For the Townes Projection:

Angle CR _____° caudad to OML, or _____° caudad to IOML

30 or 37

300

Centering point for lateral skull

2 in above EAM

400

Petrous pyramids are projected into the lower one-third of the orbits.

caldwell

500

Sella turcica, dorsum sellae, and clinoids in profile.

lateral