Skull Flashcards
Average head
Mesocephalic
Short from front to back
Brachycephalic
____ cm between parietal eminences
15
___ cm from the frontal eminence to inion
19
___ cm from vertex to chin
23
Temporal base or petrous pyramid in mesocephalic forms an angle of _____ to ____ to the MSP
45° to 47°
Petrous pyramid in brachycephalic forms an angle greater than _____ to the MSP
47°
The width (in brachycephalic) is ___ % or greater than the length
80
Head is long from front to back
Narrow from side by side
Deep from vertex to base
Dolicocephalic
Petrous pyramid (in dolicocephalic) forms an angle less than _____ (approximately 40°) to the MSP
47°
The width is less than ____% of the length
75%
Symmetrically divides the body into left and right halves
Midsagittal Plane or Median Plane (MSP)
Connecting the pupils or outer canthi of the eyes
Interpupillary Line or Interorbital Line (IPE)
Slight depression above each eyebrow
Corresponds to the anterior fossa of the cranial vault
Supraorbital Groove (SOG)
Superior rim of each orbit
Supraorbital Margin (SOM)
Ridge of bone on each eyebrow
Supercililliary Arch
Smooth prominence between the eyebrow and above the bridge of the nose
Glabella
Depression at the nose bridge, junction of the 2 nasal bones and frontal bone
Nasion
Junction of the upper lip and the nasal septum
The point where the nose and lip meet
Acanthion or Little Horn
Large flap of cartilage at the external portion of the ear
Pinna or Auricle
Small cartilaginous flap covering the ear
Tragus
Superior attachment of the auricle
Same level of petrous ridge
Top of the ear attachment
Junction of the upper and lower eyelids
Canthi/Canthus
The lower posterior angle on each side of the jaw or mandible
Gonion/Angle of the Mandible
The midpoint of this triangular area of the chin as it appears from the front
Mental Point
In an infant it is called Anterior Fontanel, in adult it is _____
Bregma
In an infant it is called Posterior Fontanel, in adult it is _____
Lambda
In an infant it is called Right Sphenoid Fontanel, in adult it is _____
Right Pterion
In an infant it is called Left Sphenoid Fontanel, in adult it is _____
Left Pterion
In an infant it is called Right Mastoid Fontanel, in adult it is _____
Right Asterion
In an infant it is called Left Mastoid Fontanel, in adult it is _____
Left Asterion
It is a line between the glabella and EAM
Glabellameatal Line (GML)
Frequently used positioning line located between the outer canthus and the EAM
Also called the Radiographic Base Line
Orbitomeatal Line (OML)
Reids base line
Line of Frankfurt
Anthropological base line
Base line of the cranium
It is a line wc connects the infraorbital point to the EAM
Infraorbitomeatal Line (IOML)
