Skull Review Flashcards
Which positioning landmark is located at the most superior point of the nasal bones?
Nasion
Which positioning landmark is the smooth elevation that is located between the superciliary arches?
Nasion
Which suture articulates the frontal bone with both parietal bones?
Coronal
Which suture joins both parietal bones with occipital bone?
Lambdoidal
The bregma fontanelle is located at the junction of which two sutures?
coronal and sagittal
The lambda fontanelle is located at the junction of which two sutures?
lambdoidal and sagittal
The bregma fontanelle is located at the junction of which cranial bones?
frontal and both parietals
Which skull classification refers to a long, narrow skull?
Dolichocephalic
Which skull classification refers to a short, wide skull?
Brachycephalic
Which skull classification refers to a typical skull?
Mesocephalic
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramids in the mesocephalic skull?
47 degrees
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramids in the brachycephalic skulls?
54 degrees
How many degrees are in the angle formed betwen the midsagittal plane and the petrous pyramids in the dolichocephalic skulls?
40 degrees
On which cranial bone is the cribriform plate located?
Ethmoid
The pterygoid processes project inferiorly from which cranial bone?
Sphenoid
Which bones comprise the bridge of the nose?
Nasal
Where is the vomer bone found?
On the floor of the nasal cavity
Which term refers to the anterior process of the mandibular ramus?
Coronoid
Which term refers to the posterior process of the mandibular ramus?
Condyle
Which two positioning lines or planes should be perpendicular to the IR for the PA projection of the skulls?
Orbitomeatal line and midsagittal plane
With reference to the patient, where should the IR be centered for the lateral projection of the skull?
2 inches above the EAM
Which positioning line should be parallel with the IR for the SMV projection of the skull?
Infraorbitomeatal line
Which projection of the skull produces a full basal image of the cranium?
SMV, Schuller method
Which projection of the skull should be obtained when the frontal bone is of primary interest?
PA with perpendicular central ray
For the PA axial projection, Haas method, of the skull, where should the central ray enter the patient’s head?
1.5 inches below the external occipital protuberance
How many degrees and in which direction should the central ray be directed for the PA axial projection, Haas method, of the skull?
25 degrees cephalad
Which evaluation criterion pertains to the PA axial, Haas method, of the skulls?
The dorsum sella and posterior clinoids projected within the foramen magnum.
Which positioning line extends from the EAM to the outer canthus?
Orbitomeatal
Which positioning landmark is located at the base of the nasal spine?
Acanthion
Which positioning landmark is most superior?
Glabella
Where on the skull is the gonion located?
On the lateroposterior part of the mandible
Where on the skull is the outer canthus located?
On the lateral border of each orbit
Which positioning landmark is located at the anterior portion of the anterior portion of the mandible?
Mental point
Which suture joins both parietal bones at the vertex
Sagittal
Which suture join a parietal bones with both a sphenoid bone and a temporal bone?
Squamosal
the lambda fontanelle is located at the junction of the which cranial bones?
Occipital and both parietals
On which cranial bone are the superciliary arches located?
Frontal
On which cranial bone is the crista galli located?
Ethmoid
Which cranial bone has a petrous pyramids?
Temporal
On which cranial bones is the sella turciaca located
Sphenoid
Which cranial bone has the mastoid process?
Temporal
On which cranial bone is the perpendicular plate located?
Ethmoid
Which cranial bone has both greater and lesser wings?
Sphenoid
Which cranial bone does the first cervical vertebra articulate?
Occipital
The foramean magnum is a part of which cranial bone?
Occipital
Form which cranial bone does the zygomatic process arise?
Temporal
The EAM is a part of which cranial bone?
Temporal
The temporal process projects posteriorly from which facial bone?
Zygomatic
With which bone does the mandible articulate?
Temporal
Where are the lacrimal bones located?
On the medial wall of each orbits
Which bone comprises most of the lateral wall of the orbital cavities?
Zygomatic
Which facial bones have alveolar processes?
maxillae and mandible
Which bones form the posterior one fourth of the roof of the mouth?
Palatine
Which postioning landmark is located on the maxillae?
Acanthion
With reference to the IR, how should the interpupilary line and the midsagittal plane be positioned for a lateral projection of the skull?
IP: perpendicular; MSP: parallel
For the AP axial projection, Towne method, of the skull, how many degrees and in which direction should the central ray be directed when the OML is perpendicular to the IR?
30 degrees caudad
For the AP axial projection, Towne method, of the skull, how many degrees and in which direction should the central ray be directed when the IOML is perpendicular to the IR?
37 degree caudad
Which projection of the skull can be correctly performed with the central ray angled 37 degrees?
AP axial, Towne method
Which projection of the skull can be correctly performed with the central ray angled 15 degrees?
PA axial, Caldwell method
Which projection of the skull projects the peterous bones in the lower third of the orbits?
PA axial, Caldwell method
Which evaluation criterion pertains to the AP axial projection, Towne method, of the skulls?
Part of the sella turicica should be seen within the foramen magnum.
Which evaluation criterion pertains to the PA projection of the skull?
The distance from the lateral border of the skull to the lateral border of the orbits should be the same on both sides
Which evaluation criterion pertains to the lateral projection of the skull?
The orbital roofs should be superimposed
Which evaluation criterion pertains to the SMV projection of the skull?
The mental protuberance should superimposed the anterior frontal bone.
