Bones/Structures
What is the total number of bones of the skull?
22
Which suture is associated with the parietal and occipital bones
lambdoidal
Another name for skull cap
calvarium
The highest point of the skull is the
vertex
What is a common positioning error of the skull?
rotation
The anterior clinoid process is a part of which bone?
Sphenoid
The junction point formed where the coronal and sagittal sutures meet is called the
bregma
This bone is not a part of the floor of the cranium
occipital
Sutural or wormian bones are most often found?
within the lambdoidal suture
The PA axial projection (Haas method) for the cranium requires a CR angle of 25 caudad.
True/False
False
The ethmoid notch is part of which part of the skull?
Frontal bone
The two-part articulation between the skull and cervical spine is called the
The jugular foramen is located on which bone
temporal
Where is the widest portion of the skull located?
between the parietal tuberance
A fracture occurs through the squamous portion of a cranial bone. Which bone is involved?
temporal bone
Which cranial bone makes up an aspect of the bony nasal septum?
ethmoid bone
What is the joint classification of the sutures?
fibrous, synathrodial (immovable)
What is the mesocephalic skull width percentage?
75-80% of the length
This pyramid-shaped portion of the skull is the thickest and densest bone in the cranium
The thyroid dose range received for an AP axial (Towne method) skull is:
50 to 100 mRAD
What are the 3 major portions of the temporal bone?
squamous,tympanic, petrous
The sphenoid fontanel in an infant corresponds to which adult cranial junction
pterion
Name the 6 fontanels of an infant
anterior, posterior, right/left sphenoid, right/left mastoid
Which portion of the temporal bone is most vulnerable to fracture
squamous portion
On an AP Axial Towne view, the posterior arch of C1 and the dorsum sellae are demonstrated within the foramen magnum. What was the positioning error?
Overangulation of the CR or excessive flexion of the neck