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

where are the lacrimal bones located

on the medial wall of each orbit

where is the vomer bone found

on the floor of the nasal cavity

which two postitioning lines or planes should be perperndicular to the IR for the PA projection of the skull

orbitomeatal line (OML) and midsagital plane (MSP)

with reference to the IR, how should the interpupillary line and the MSP be postitioned for the lateral projection of the skull

Interpupillary line perpendicular: MSP parallel

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positioningskull

skull

Question	Answer
Which positioning line extends from the EAM to the outer canthus	Orbitomeatal OML
which positioning landmark is located at the base of the nasal spine	acanthion
what 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	glabella
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 on the anterior portion of the mandible	mental point
which suture articulates the frontal bone with both parietal bones	coronal
which suture joins both parietal bones at the vertex of the skull	sagital
which suture joins a parietal bone with both a sphenoid bone and a temporal bone	squamosal
which suture joins both parietal bones with the occipital bone	lambdoidal
the bregma fontanel is located at the junction of which 2 sutures	coronal and sagital
the lambda fontanel is located at the junction of which 2 sutures	lambdoidal and sagital
the bregma fontanel is located at the junction of which cranial bones	frontal and both parietals
the lambda fontanel 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 midsagital planes and the petrous pyramids in the mesocephalic skull	47 degrees
how many degrees are in the angle formed between the midsagital planes and the petrous pyramids in the brachycephalic skull	54 degrees
how many degrees are in the angle formed between the midsagital planes 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 cribiform plate located	ethmoid
on which cranial bone is the crista galli 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 ehich cranial bone does the first cervical vertebrae articulate	occipital
the pterygoid process 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 posteriorly from which facial bone	zygoma
which bone comprises the bridge of the nose	nasal
with which bone does the mandible articulate	temporal
where are the lacrimal bones located	on the medial 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
which term refers to the posterior process of the mandibular ramus	condyle
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 postitioning lines or planes should be perperndicular to the IR for the PA projection of the skull	orbitomeatal line (OML) and midsagital plane (MSP)
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" above the EAM
with reference to the IR, how should the interpupillary line and the MSP be postitioned for the lateral projection of the skull	Interpupillary line 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 IOML is perpendicular the the IR	37 degrees caudal
which postitioning line should be parallel with the IR for the SMV projection of the skull	infraorbitalmeatal line (IOML)
which projection of the skull can be correctlu performed with the central ray angles 37 degrees	AP axial, Towne Method
which projection of the skull can be correctly performed with the central ray angles 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, Haas method, of the skull, where should the central ray enter the patients head	1 1/2" below the external occipital protruberance
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 cephalic
for the parietoorbital oblique projection, Rhese method, of the skull, which postitioning line should be perpendicular to the IR?	Acanthiomeatal
with reference to the orbit, where should the optic foramen be imaged on the radiograph to indicate correct positioning of the patient for the parietoorbital oblique projection, Rhese method, of the skull	within the lower outer quadrant
be formed between the MSP and the IR	53 degrees
which structure is best demonstrated when MSP of the patients head is rotated from perpendicular to the IR to a 45 degree angle with the plane of the IR, CR enters about 1" anterior and 3/4" superior to the EAM	left petrous portion
how many degrees and in which direction should the CR be directed for axiolateral oblique projections (Arcelin Method, anterior profile)	10 degrees caudal
which projection requires that the patient's head be rotated from true lateral, moving the face closer to the IR, until the MSP forms an angle of 15 degrees with the IR	parietoacanthial (Waters method)
The bones of the skull are divided into two major groups, what are they?	cranial bones and facial bones
list the cranial bones by name and quantity	1 frontal 1 ethmoid 2 parietal 1 sphenoid 2 temporal 1 occipital
list the facial bones by name and quantity	2 nasal 2 lacrimal 2 maxillae 2 zygomatic 2 palatine 2 inferior nasal conchae 1 vomer 1 mandible
list the three classifications of skull shapes and the degree of angulation formed by the petrous pyramids and the MSP	mesocephalic 47 degrees brachycephalic 54 degrees dolichocephalic 40 degrees
the bones fo the cranial vault are classified as what kind of bones	flat
the inner layer of spongy tissue found inside cranial bones is called	diploe
the 2 fontanels located on the MSP of the skull are	bregma and lambda
the fontanel located at the junction of the coronal and sagittal sutures is the	bregma
the fontanel located at the junction of the lambdoidal and sagittal sutures is the	lambda
the bone that forms the anterior portion of the cranium is the	frontal bone
the cranial bone located between the orbits and posterior to the nasal bones is the	ethmoid bone
the cranial bones that form the vertex and most of the sides of the cranium are the	parietal bones
the prominent bulge of the parietal bone is called the	parietal eminence
the 2 parietal bones with the frontal bones to form the	sagittal suture
the 2 parietal bones articulate with the frontal bone to form the	coronal suture
the 2 parietal bones articulate posteriorly with the	occipital bone
the 2 parietal bones and the occipital bone join together to form the	lambdoidal suture
the cranial bone that provides a depression to house the pituitary gland is the	sphenoid bone
the cranial bone that forms the posteroinferior portion of the cranium is the	occipital bone
the portion of the occipital bone that projects anteriorly from the foramen magnum is the	basilar portion
the large opening of the occipital bone through which part of the medulla oblongata passes is the	foramen magnum
the basilar portion of the occipital bone fuses anteriorly with the body of the	sphenoid bone
the structure that articulates with the occipital condyles is the	C1 vertebrae (atlas)
the middle portion of the cranial base is formed by the	sphenoid bone
the organs of hearing are located in the	temporal bone
the structure that separates the EAM from the auditory ossicles is the	mastoid process
the thickest and densest portion of bone in the cranium is the	petrous portion
the petrous portion is a part of the	temporal bone
the fibrocartilaginous, oval-shaped portion of the external ear is the	auricle
the 3 auditory ossicles are	malleus, incus and stapes
the zygomatic process projects anteriorly from the	temporal bone
the bone that forms part of the cranial base between the greater wings of the sphenoid and the occipital bone is the	temporal bone
the facial bones that form the bridge of the nose are the	nasal bones
the anterior portion of the medial walls of the orbits is formed by the	lacrimal bones
the largest of the immovable bones in the face is the	maxilla bone
the body of each maxilla contains a large pyramidal cavity, callled the	maxillary sinus
the thick ridge on the inferior border of the maxillary bone that supports the teeth is the	alveolar process
the anterior nasal spine projects superiorly from the	maxillae
the radiographically significant landmark that is the midpoint of the anterior nasal spine is the	acanthion
the facial bones that form the inferolateral portion of the orbital margin are the	zygomatic bones
the facial bones that form the prominence of the cheeks are the	zygomatic bones
the facial bones that form the posterior 1/4th of the roof of the mouth are the	palatine bones
the scroll-like bony tissue that extends along the lateral walls of the nasal cavity are the	inferior nasal conchae
the facial bone forming the inferior part of the nasal septum is the	vomer
the largest and densest bone of the face is the	mandible
the portion of the mandible that extends superiorly from the posterior aspect of the mandibular body is the	ramus
the U-shaped bone located at the base of the tongue is the	hyoid bone
the 2 processes that extend superiorly from a mandibular ramus are the	condyles and the coronoid process
the part of the mandible that articulates with the mandibular fossa of the temporal bone to form the temporomandibular joint is the	condyle
nasion	frontal bone
glabella	frontal bone
four angles	parietal bone
lesser wing	sphenoid bone
greater wing	sphenoid bone
two condyles	occipital bone
crista galli	ethmoid bone
sella turcica	sphenoid bone
foramen magnum	occipital bone
cribiform plate	ethmoid bone
mastoid process	temporal bone
basilar portion	occipital bone
petrous portion	temporal bone
pterygoid hamulus	sphenoid bone
zygomatic process	temporal bone
supraorbital margin	frontal bone
perpendicular plate	ethmoid bone
lateral pterygoid process	sphenoid bone
anterior clinoid process	sphenoid bone
posterior clinoid process	sphenoid bone
cheekbone	zygoma
largest facial bone	mandible
number of facial bones	14
forms the bridge of the nose	nasal
vertical mandibular portion	head
found in the roof of the mouth	palatine
midpoint of the anterior nasal spine	acanthion
articulating process of the mandible	condyle
spongy process that holds the teeth	alveolar
anterior part of the mandibular ramus	coronoid
landmark at the angle of the mandible	gonion
found in the medial wall of the orbit	lacrimal
forms the inferior portion of the nasal septum	vomer
horseshoe-shaped mandibular portion	body
thin, scroll-like bones that extend horizontally inside nasal cavity	inferior conchae
AML	acanthiomeatal line
TEA	top of ear attachment
IAM	internal acoustic meatus
IPL	interpupillary line
GML	glabellomeatal line
midpoint of the frontonasal suture	nasion
midpoint of the anterior nasal spine	acanthion
posterior surface of the occipital bone	inion
smooth elevation between the supercilliary arches	glabella
lateral aspect of each orbit, where the 2 eyelids originate	outer canthus
angle of the mandible	gonion
superior aspect of the cranium, where the parietal bones join together	vertex
raised prominece just above each orbit on the frontal bone, coincides with the eyebrows	supercilliary arches
midpoint of the mental protuberance: anterior aspect of the mandible: where the 2 mandibular bodies join together	mental point
line extending across the front through both eyes	interpupillary
plane dividing the skull into equal right and left halves	MSP
line extending from the glabella to the anterior aspect of the maxilla	glabelloalveolar
line extending from the EAM to the outer canthus	infraorbitomeatal line IOML
line extending from the EAM to the midpoint of the anterior nasal spine	acanthiomeatal line AML
line extending from the EAM to the smooth elevation between the supercilliary arches	glabellomeatal line
How many degrees exist in the angles formed by the OML and IOML	7 degrees
How many degrees exist in the angles formed by the OML and GML (glabellomeatal line)	8 degrees

Created by: 100001225073119

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