Basic Skulls Vocabulary Flashcards

These flashcards cover the vocabulary related to the basic anatomy of the skull, including anatomical landmarks, bones, and specific radiographic projections relevant to skull imaging.

Ethmoid Bone

A lightweight bone located between the eyes, forming part of the nasal cavity and the orbits.

Mandible

The lower jawbone, the only movable bone of the skull.

Zygomatic Bone

The bone that forms the cheekbone, also part of the lateral orbit.

Fontanels

Soft spots on a baby's skull where the bones have not yet fused.

Temporomandibular Joint

The joint connecting the mandible to the temporal bone of the skull.

What are the 8 cranial bones (some are paired)?

frontal, parietal (paired), temporal (paired), occipital, ethmoid, sphenoid

What are the 14 facial bones (some are paired)?

nasal (2), zygomatic (2), maxillae (2), palatine (2), inferior nasal conchae/turbinates (2), lacrimal (2), mandible, vomer,

What is the bone structure of the skull bones (layers)?

inner table (compact) - diploe (spongy tissue) - outer table (compact)

What types of joints are the cranial sutures?

Synarthroidal (fibrous)

What suture connects the frontal/parietal bones?

coronal

What suture is between the occipital and parietal bones?

lambda

What suture is between the temporal and parietal bones?

squamosal suture

What is the coronal + sagittal junction?

Bregma

What is the sagittal and lambdoidal junction?

lambda

What is the parietal and occipital junction?

Asterion

What is the parietal and squamosal junctions?

Pterion

What are the 3 different skull types? Which has the steepest/smallest petrous pyramid angle?

Mesocephalic (typical), brachycephalic (short/broad), dolichocephalic (long/narrow). Last one has the steepest petrous pyramid.

Where are the petrous pyramids located?

Temporal bone (project medially and anteriorly from lateral margin of skull.

What is the degree difference between the GMBL and OMBL?

8 degrees

What is the degree difference between the OMBL and IOMBL?

7 degrees

What is _ from the IR gets thrown the farthest by the CR.

Farthest

What are the bone layers in the skull?

inner table (compact bone) → dipole (spongy tissue) → outer table (compact bone)

What are the cranial fossas?

anterior, middle, and posterior

The superior and middle nasal conchae are found in which bone?

ethmoid

The sella turcica, superior orbital fissure, and optic foramen are located within which bone?

sphenoid

What are three foramen found in the sphenoid bone?

spinosum, ovale, rotundum

On which bone are the mastoid and styloid processes found?

Temporal

On which bone is the zygomatic process located?

Temporal

On which bone is the temporal process located?

Zygomatic

The clivus is located on which bone?

occipital

What is the baseline and tube angle for the exaggerated waters view?

OMBL 55 degrees chin up. 23 degrees caudal tube angle.

What is the baseline and tube angle for the parietoacanthial waters view?

OMBL 37 degrees chin up, no tube angle