Frontal Bone Flashcards
Frontal Squame
The forehead.
Ethmoid Notch
This is the gap separating the two orbital plates of the frontal. The ethmoid bone fills this notch in the articulated cranium.
Orbital Plate
The horizontal portion of the frontal on the interior frontal. Its endocranial surface is undulating (bumpy), conforming to the interior surface of the frontal lobe.
Glabella
Bone area that is slightly depressed and lies between the eyebrows.
Frontal Sinus
Generally anterior to the ethmoidal notch. They extend for a variable distance between outer and inner bone tables of the frontal and sometimes penetrate the orbital plates.
Supraorbital Margin
The upper orbital edges.
Supraorbital Foramen or Notches
These are along the medial half of the superior orbital run
Zygomatic Processes
These form the most lateral and anterior corners of the frontal.
Superciliary Arch
Known as the brow ridges, these are the bony tori over the arches. They are most prominent in males and are sometimes joined by a prominent glabellar region.
Temporal lines
These are on the lateral ectocranial surface and mark where the termporalis muscles attach. This line becomes a crest in its anterior and they are often divided into superior and inferior lines as they sweep posteriorly.
Frontal Tuberosity
These dominate the ectocranial surface of the frontal squama.
Coronal Suture
The line that marks the fusion between the parietals and frontal bone.
Foramen Caecum
This is a foramen of varying size that is found at the base of the frontal crest (which is on the interior surface of the frontal bone) and transmits a small vein from the frontal sinus to the sagittal sinus.
Meningeal Grooves
These grooves are for the middle meningeal arteries that are present on both sides of the concave endocranial surface of the frontal squama.
Metopic Suture
This is a vertical suture between the left and right frontal halves. Only occasionally does it last into adulthood.
