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70 Cards in this Set

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Reid’s baseline (aka "base line" or "anthropologic baseline") is more commonly referred to as:
IOML
What cranial bones form the upper lateral walls of the calvarium?
Parietals
For the Parietoorbital oblique projection, Rhese method, of the orbit, how many degrees of angle should be formed between the MSP and the IR?
53 degrees
Which position is performed with the patient’s head positioned true lateral and the CR directed 25 degrees cephalad?
Axiolateral oblique projections of the mandible.
True or false. The opposite side of the mandible should overlap the ramus for an axiolateral oblique projection of the mandible.
False.
How many degrees and in which direction should the CR be directed for the Axiolateral oblique projection of the mandible?
25 degrees cephalad
For the Parietoorbital oblique projection, Rhese method, of the orbits, which positioning line should be perpendicular to the IR?
Acanthiomeatal
Which of the following structures can be well demonstrated with an Axiolateral oblique projection (Modified Law method)?
TMJ
To demonstrate the mandibular body with the Axiolateral oblique projection, how should the patient’s head be positioned?
From true lateral, rotate the head 30 degrees toward the IR.
How many degrees and in which direction should the CR be directed for the Axiolateral oblique projection (Schuller method) for TMJs?
25 degrees caudal
An AP axial projection (Towne method) of the bilateral zygomatic arches is performed similarly to the AP axial projection (Towne method) of the skull, except that the projection for the zygomatic arches requires which of the following be done?
CR should be directed to the glabella
Which projection of the skull can be correctly performed with the CR angled 15 degrees?
PA Axial, Caldwell method
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramids in the brachycephalic skull?
54 degrees
From which cranial bone does the zygomatic process arise?
Temporal
How many degrees are in the angle formed between the midsagittal plane and the petrous pyramids in the dolichocephalic skull?
40 degrees
The external acoustic meatus is a part of which cranial bone?
Temporal
On which cranial bone is the Crista galli located?
Ethmoid
With which bone does the mandible articulate?
Temporal
Which skull classification refers to a typical skull (in terms of length and width)?
Mesocephalic
Which bone comprises most of the lateral wall of the orbital cavities?
Zygomatic
Where should the petrous ridges be seen in the image of the Parietoacanthial projection of the facial bones?
Below the maxillary sinus
Which bones from the posterior one fourth of the roof of the mouth?
Palatine
Which skull classification refers to a long, narrow skull?
Dolichocephalic
Which skull classification refers to a short, wide skull?
Brachycephalic
Which projection of the skull can be correctly performed with the CR angled 37 degrees?
AP Axial, Towne method
With reference to the IR, how should the MSP be adjusted for the tangential projection demonstrating an individual zygomatic arch?
15 degrees from perpendicular
Which suture joins both parietal bones with the occipital bone?
Lambdoidal
Where are the lacrimal bones located?
On the medial wall of each orbit
Which positioning line should be parallel with the IR for the SMV projection of the skull?
Infraorbitomeatal line
Which suture joins a parietal bone with both a sphenoid bone and a temporal bone?
Squamosal
The Bregma fontanel is located at the junction of which two sutures?
Coronal and sagittal
With reference to the patient, where should the IR be centered for the lateral projection of the skull?
2" above EAM
Which projection of the skull produces a full basal image of the cranium?
SMV Schuller method
Where is the vomer bone found?
On the floor of the nasal cavity
Which projection of the skull projects the petrous bones in the lower third of the orbits?
PA Axial Caldwell method
The Lambda fontanel is located at the junction of which cranial bones?
Occipital and both parietals
The lambda fontanel is located at the junction of which two sutures?
Lambdoidal and Sagittal
The Pterygoid processes project inferiorly from which cranial bone?
Sphenoid
The Bregma fontanel is located at the junction of which cranial bones?
Frontal and both parietals
With reference to the IR, how should the CR be directed for the Parietoacanthial projection, Waters method?
Perpendicular
With reference to the patient, where should the IR be centered for the PA 15 degree (Caldwell method) projection of the skull?
Nasion
For the PA axial projection, Haas method, of the skull, where should the CR enter the patient’s head?
1 ½ inches (3.8cm) below the external occipital protuberance
How many degrees and in which direction should the CR be directed for the PA axial projection, Haas method, of the skull?
25 degrees cephalad
Which suture articulates the frontal bone with both parietal bones?
Coronal
Which two positioning lines or planes should be perpendicular to the IR for the PA projection of the skull?
Orbitomeatal line and midsagittal plane
True or false. For an SMV projection for the paranasal sinuses, the mandibular condyles should be anterior to the petrous ridges.
True
Which sinus group is of primary interest on the lateral projection of sinuses?
Sphenoid
Where should the petrous ridges be seen in the image of the PA 15 degree axial projection, Caldwell method?
Lower one third of the orbits
Which sinus group is NOT well visualized in the image produced by the Parietoacanthial projection, Waters method?
Sphenoidal
Which sinus groups are best demonstrated with the PA projection, Caldwell method?
Frontal and anterior ethmoidal
The tangential projection for a unilateral zygomatic arch requires that the skull be rotated 15 degrees and tilted 15 degrees away from the affected side.
False (towards the affected side)
True or false. The mandible articulates with the zygomatic bone.
False
The CR is centered to exit at the level of the _______________ for a well positioned 15 degree PA Axial projection of the facial bones.
Nasion
Name the cranial bones that the occipital bone articulates with.
Sphenoid, atlas (C1), Parietals, Temporals
Name the cranial bones that each temporal bone articulates with.
Parietal, occipital, sphenoid
What cranial bones does the sphenoid articulate with?
All of them!
What are the other names for the petrous portion?
Petrous pyramid, pars petrosa, petromastoid portion
The petrous ridge corresponds to the level of which external landmark?
TEA (top of ear attachment)
In which cranial bone is the opening (orifice) located that transmits the nerves of hearing and equilibrium and what is the name of the orifice?
Temporal bone, Internal acoustic meatus
WHat is the alternate name of the pituitary gland?
Hypophysis Cerebri
Name the foramina of the sphenoid, anterior to posterior.
Rotundum, ovale, spinosum
At what age do cranial sutures close? Fontanels?
12-13 years. 18 months.
What is another name for the auricle?
Pinna
What is the ear "lip" called?
Tragus
What is the "ear drum"?
Attic or epitympanic recess
What position would demonstrate the internal acoustic meatus?
Modified PA Caldwell (5-10 degrees caudal angle to the OML)
The shape of the average head is termed ________ and has a width of ____ cm and length of ____ cm.
Mesocephalic, 15, 19 (width 75% of length)
In a mesocephalic head, petrous ridges are at an angle of ____ MSP.
47 degrees
What is a brachycephalic head and at what angle are the petrous ridges?
Width 80+% more than length (>47 degrees, + or - 54 degrees)
In a dolichocephalic head at what angle are the petrous ridges in relation to the MSP?
+ or - 40 degrees (<47 degrees), width is less than 75% of length