Skull Flashcards
What is the name of the articulation between the frontal bone and the parietal bones?
Coronal suture
Which facial bones are demonstrated on the PA Axial projection (Caldwell)?
Orbits and zygoma
When taking a PA axial projection (Caldwell) of the skull, the CR is directed
15 degrees caudad
What is the name of the articulation between the parietal bones
Sagittal suture
Where is the squamosal suture?
Between the parietal and temporal bones
Which projection demonstrates all of the paranasal sinuses?
Lateral
What term is used to identify the angle of the mandible?
Gonion
The petrous pyramid is a portion of which bone?
Temporal bone
A blowout fracture involves the
Floor of the orbit
Which facial bone forms the inferior part of the nasal septum
Vomer
Air filled cavities located in some bones of the face and cranium are called
Paranasal sinuses
Which facial bones help to form the hard palate of the mouth?
Palatine
Which projection of the cranium demonstrates the petrous pyramids within the orbits?
PA
Which facial bones are most frequently fractured?
Nasal bones
Which structure houses the pituitary gland
Sella turcica
What is the purpose of performing sinus radiography with the patient in the upright position
To demonstrate air fluid levels
What is the name of the articulation between the mandible and the cranium?
Temporomandibular joint
Which projection demonstrates the frontal bone with minimal distortion and superimposition?
PA axial projection, Caldwell
The articulation of the frontal bone with the nasal bones is known as the
Nasion
On a properly positioned PA axial projection of the skull (Caldwell), the CR exits at the level of the
Nasion
Which facial bone is found in the medial wall of the orbit between the ethmoid and maxilla?
Lacrimal
Which cranial bone is best visualized on the AP axial projection (Towne) of the skull?
Occipital bone
How should the CR be directed on a PA (Caldwell) of the sinuses?
Horizontal
On a parietoacanthial projection of the paranasal sinuses, Waters method, the petrous ridges should
Be projected below the maxillary sinuses
In which bone are the optic foramina located?
Sphenoid
The pterygoid process is a part of which bone?
Sphenoid
Which group of paranasal sinuses is located directly inferior and anterior to the sella turcica?
Sphenoidal
In the parietoacanthial projection (modified waters), the CR passes through the patients mouth, shows which paranasal sinuses?
Sphenoid
When performing a lateral projection to evaluate facial bones, the CR enters
Midway between outer canthus and EAM
The hard palate is formed by which two bones?
Maxilla and palatine
A PA projection of the skull (Caldwell) projects the petrous ridges
In the lower third of the orbits
Which cranial bone contains a petrous portion and mastoid air cells?
Temporal
Which three bones does the temporal bone articulate?
Parietal, occipital, sphenoid
Which projection requires the patient to extend the neck until the IOML is parallel to the IR?
SMV
Which sinuses are visualized on a properly positioned lateral projection radiograph?
Ethmoid, frontal, maxillary, sphenoid (all)
What radiographic positioning landmark corresponds to the location of the anterior nasal spine?
Acanthion
Which most commonly positioning landmark is located at the anterior lower margin of the mandible?
Mental protuberance
Which projection demonstrates the sphenoid sinus?
lateral
Which cranial bone houses the middle ear structures?
Temporal
Which bones contain paranasal sinuses?
Frontal, ethmoid
Mastoid process is a process of which bone?
Temporal
Patient is prone oblique position with MSP of head parallel to IR, CR 2in above EAM. What projection is this?
Lateral cranium
The foramen magnum is on which cranial bone?
Occipital
Which imaginary line used to position the skull and facial bones connects the outer corner of the eye to the EAM
OML
Patient is supine, MSP and OML perpendicular to IR, CR is 30 degrees caudad, 2/12in
AP Axial
Patient is supine and MSP of the skull is perpendicular to the IR. CR angled 30 degrees caudad. What position is this?
AP Towne
Which facial bones hold the teeth?
Mandible, Maxilla
Proper position of the radiographic baseline for PA Axial Caldwell projection of the cranium?
OML & sagittal plane perpendicular to IR
Which sinuses are demonstrated by the waters method?
Maxillary sinus and paranasal sinus
