RADI 106 - Skull Exam

If you have a brachycephalic shaped head, what does it look like?

short, broad

where is the supraorbital groove located?

slight depression above each eyebrow

which suture separates the two parietals?

sagittal

which one of the fontanels is largest in an infant?

anterior

The petrous ridge corresponds to the level of which external landmark?

TEA

The Glabella is closely associated with which cranial bone?

frontal

TRUE or FALSE: the ethmoid bone contains many small foramina that the nerves of sight pass

FALSE

The junctions of the upper and lower eyelids is referred to as the

canthi

When the anterior fontanels ossify, what junction point does it become?

bregma

If you were to choose one KVP setting for your skull series, which one of the following would you choose (best answer)?

88

76

92

66

76

What gland does the sella turcica partially surround?

pituitary

What positioning line is formed by the glabella and alveolar process?

GAL

When doing a clavicle x-ray, two views are done, an AP and an Ap axial projection with the CR directed _________

15 degrees cephalad

The Frontal bone is broken down into two parts, the Squamous and the Orbital portions. What is the squamous portion also known as?

vertical

How many cranial bones are there?

8

how do you know you have a good lateral skull view?

The 2 posterior clinoids are superimposed and 2 anterior clinoid processes are superimposed

what bone does the occipital condyles articulate with?

atlas

When doing a PA Caldwell skull, where should your petrous ridges be seen?

in the lower 1/3 of the orbits

Where on the ethmoid bone are the ethmoid sinuses found?

lateral labyrinths

what are the 3 most common positioning errors related to skull positioning?

excessive flexion, rotation & tilt

where is the nasal spine located?

At the anterior end of the ethmoid notch

What is articulation referred to as where the spine connects with the skull?

atlantooccipital joint

How many degrees of difference are there between the OML and IOML?

7-8 degrees

what serves as an anchor point for several muscles associated with tongue?

styloid process

TRUE or FALSE: The sphenoid is the only cranial bone that articulates with all the other cranial bones.

TRUE

Certain small, irregular bones sometimes develop in adult sutures. What are these bones called?

wormian

What does the perpendicular plate help form?

bony nasal septum

How many fontanels is an infant born with?

6

Situation: Upon examining your PA Caldwell view of the skull, you notice that the petrous ridges are filling the orbits, what lead to this error?

the head/neck was flexed too much

TRUE or FALSE: the petrous portion is known as the thinnest part of the skull

FALSE

When doing an AP axial Towne method for a skull, how many degrees do you angle the CR if you are going by the OML?

30 degrees caudad

On the submentovertical projection, what line should be parallel to the IR?

IOML

Olfactory nerves pass through which part of the ethmoid bone?

cribriform plate

The widest portion of a skull is between what two specific parts?

the parietal tubercles

On a PA Caldwell method of the skull, the CR is angled 15 degrees to exit where?

nasion

This disease appears as a "cotton wool" appearance with irregular areas of increased density.

pagets disease

What shape does the sella turcica closely resemble?

a saddle

If you are doing an Ap axial towne view of the skull, what would you see in the foramen magnum on a perfectly positioned x-ray?

dorsum sella

what are the primary parts of the temporal bone?

petrous, squamous & mastoid

There are two divisions of the cranium, which are the two?

calvarium & floor

What is another name for the external occipital protuberance?

inion

What is the other name for the Submentovertex view of the skull?

full basal

When doing a lateral skull, where does the CR enter?

Perpendicular, to enter 2 inches superior to the EAM