SKULL Flashcards
which positioning line extends from the EAM to the outer canthus?
Ordbitomeatal
which positioning landmark is located at the base of the nasal spine?
Acanthion
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?
Gladbella
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 of each orbit
which positioning landmark is located at the anterior portion of the mandible?
Mental point
which structure articulates the frontal bone with both parietal bones?
Coronal
which suture joins both parietal bones at the vertex of the skull?
Sagittal
which suture joins a parietal bone with both a sphenoid bone and a temporal bone?
Squamosal [suture]
which suture joins both parietal bones with the occipital bone?
Lambdoidal [suture]
the bregma fontanelle is located at the junction of which two sutures?
coronal and sagittal [sutures]
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
The lambda fontanelle is located at the junction of which cranial bones?
Occipital and both parietals
Which skull classification refers to a typical skull (in terms of width and length)?
Mesocephalic
Which skull classification refers to a long, narrow skull?
Dolichocephalic
Which skull classification refers to a short, wide skull?
Brachycephalic
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramides in the mesocephalic skull?
47 degrees
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramides in the brachycephalic skull?
54 degrees
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramids in the dolichocephalic skull?
40 degrees
On which cranial bone are the superciliary arches located/
Frontal
On which cranial bone is the cribriform plate located?
Ethmoid
On which cranial bone is the crista galii located?
Ethmoid
Which cranial bone has a petrous pyramid?
Temporal
On which cranial bone is the sella turcica 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
With which cranial bone does the first cervical vertebra articulate?
Occipital
The pterygoid processes project inferiorly from which cranial bone?
Sphenoid
The foramen magnum is a part of which cranial bone?
Occipital
From which cranial bone does the zygomatic process arise?
Temporal
The EAM is a part of which cranial bone?
Temporal
The temporal process projects [moc ra] posteriorly from which facial bone?
Zygomatic
Which bones comprise the bridge of the nose?
Nasal
With which bone does the mandible articulate/
Temporal
Where are the lacrimal bones located?
On the medital wall of each orbit
Where is the vomer bone found?
On the floor of the nasal cavity
Which bone comprises most of the lateral wall of the orbital cavities?
Zygomatic
Which term refers to the anterior process of the mandibular ramus?
Coronoid [process]
Which term refers to the posterior process of the mandibular ramus?
Condyle [process]
Which facial bones have alveolar processes?
Maxillae and mandible
Which bones form the posterior one fourth of the roof of the mouth?
Palatine
Which positioning landmark is located on the maxillae?
Acanthion
Which two positioning lines or planes should be perpendicular to the IR for the PA projection of the skull?
Orbitomeatal line and midsagittal plane
With reference to the patient, where should the IR be centered for the PA projection of the skull?
Nasion
With reference to the patient, where should the IR be centered for the lateral projection of the skull?
2 inches (5cm) below the EAM
With reference to the IR, how should the interpupillary line and the midsagittal plane be positioned for the lateral projection of the skull?
Interpupillary line: perpendicular; midsagittal plane: parrallel
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 degrees caudad
Which positioning line should be parallel with the IR for the SMV projection of the skull?
Infraorbitomeatal line
Which projection of the skull can be correctly performed wiht 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 produces a full basal image of the cranium?
SMV, Schuller method
Which projection of the skull projects the petrous bones in the lower third of the orbits?
PA axial, Caldwell method
which projection of the skull should be obtained when the frontal bone is of primary interest?
PA with perpendicular central ray
Which evaluation criterion pertains to the AP Axial projection, Towne method, of the skull?
Part of the sella turcica 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 orbit 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 superimpose the anterior frontal bone
For the PA axial projection, Hass method, of the skull, where should the central ray enter the patient’s head/
1 1/2 inches (3.8 cm) below the external occipital protuberance
How many degrees and in which direction should the central ray be directed for the PA axial projection, Hass method, of the skull?
25 degrees cephalad
Which evaluation criterion pertains to the PA axial, Hass method, of the skull?
The dorsum sella and posterior clinoids projected within the foramen magnum
