Ch 11 Cranium Flashcards
How many bones are in the cranium
8
How many facial bones are there
14
Where is the frontal bone
Forehead region
Where is the parietal bone
Posterior superior portion
Where is the occipital bone
Inferior posterior portion
Where is the temporal bone
Anterior the occipital bone on both sides
Where is the sphenoid bones
Inferior frontal & parietal bone, in front of temporal bone
Where is the ethmoid bone
Inferior frontal bone behind the nasal bone
Where is the coronal suture
Top of the head, runs side to side between frontal & parietal bones
Where is the sagittal suture
Front to back down the middle of the skull - sagittally
Where is the Squamosal suture
Runs in between parietal bone & temporal bones
What houses the auditory organs and organs of hearing
Temporal bone
Which is the densest and thickest portion of the cranium
Petrous portion of the temporal bone
Which line is perpendicular to the IR for the Caldwell view
Orbital meatal line
Where is the Canthus - inner & outer
Corners of the eyes
Where is the Nasion
Bridge of the nose
Where is the acanthion
Bottom of the nose
Where is the mental point
Chin
Where is the infraorbital meatal line
Below the eye
Which skull is average size
Mesocephalic
In a mesocephalic skull, at what degree is the petrous pyramids from the MSP
47°
If the MSP is parallel to the inter pupillary line and perpendicular to the IR, what projection is it
Lateral projection
What is perpendicular to the It for a AP Axial Townes method of the cranium
Infraorbital meatal line
Where is the petrous ridges for the PA of the Cranium
Fills the orbit of the eye
Where is the petrous ridges in a Axial Caldwell method of the cranium
Bottom 1/3 of the orbit of the eye
Where is the dorsum sellae
Arch that connects orbits directly over bridge of the nose on an anterior view
Posterior part of sella Turcica laterally
Where is the petrous ridges
In orbit of eye. Floor of eye
Lateral Skull Projection
SID: 40”
Upright or seated, have patient put the side of their head directly parallel to the IR
CR: 2” about the EAM (external Acoustic Meatus)
Suspend breathing
PA Skull Projection - Caldwell
SID: 40”
Position patient seated or prone with their forehead & nose touching the IR
CR: exits the Nasion
Suspend breathing
PA Axial Skull - Caldwell
SID: 40”
Position patient seated or prone with their forehead & nose touching the IR
CR: 15° caudad & exits the Nasion
Suspend breathing
AP Axial Skull Projection Townes Method
SID: 40”
Position patient supine or upright with back of head to IR. InfraOrbitomeatal line perpendicular to IR
CR: 30° angulation caudad. 2.5” above glabella directed at foramen magnum.
Suspend breathing
Submentovertical projection of the skull
SID: 40”
Position patient by making IOML parallel with IR
CR: through the sella turcica, perpendicular to the IOML (infraorbitomeatal line)
Suspend breathing
