Skull Info Flashcards
How many bones does the skull consist of?
22
How many sutures connect the cranial bone and what are they?
- 4
- Coronal
- Sagittal
- Squamosal
- Lambdoidal
What are the two groups that the skull is divided in?
- Cranial
- Facial
How many bones make up the cranium?
8
How many bones make up the face?
14
What two groups are the cranial bones separated into?
- Calvaria
- Cranial floor
What does calvaria mean?
skull cap
Whats another name for skull cap?
Calvaria
How many bones make up the calvaria and what are they?
- 4
- Frontal
- Occipital
- Right parietal
- Left parietal
How many bones make up the cranial floor and what are they?
- 4
- Ethmoid
- Sphenoid
- Right temporal
- Left temporal
What portions is the frontal bone divided into?
- Vertical portion
- Horizontal portion
What does the vertical portion of the frontal bone form?
Forehead
What does the horizontal portion of the frontal bone form?
Superior part of the orbit
What is the horizontal portion of the frontal bone also known as?
The orbital portion
What is the vertical portion of the frontal bone also known as?
Squamous portion & frontal squama
What portion of the frontal bone forms the forehead?
Vertical portion
What portion of the frontal bone is aka the squamous portion & frontal squama?
Vertical portion
What portion of the frontal bone form the superior part of the orbit?
Horizontal portion
What portion of the frontal bone is aka the orbital portion?
Horizontal portion
How many landmarks do you see on the frontal bone and what are they?
- 6
- Supraorbital Groove (SOG)
- Supraorbital Margin (SOM)
- Superciliary Ridge (Arch)
- Glabella
- Ethmoidal Notch
- Nasal Spine (aka frontal spine)
Whats another name for the nasal spine?
Frontal spine
Whats another name for the frontal spine?
Nasal Spine
What is the supraorbital margin (SOM)?
The superior rim of the orbit
What is the supraorbital groove (SOG)?
A slight depression above each eyebrow
What does the supraorbital groove (SOG) mark?
The highest level of facial bone mass
What is the superciliary ridge (arch)?
Ridge of bone beneath each eyebrow
What is the ethmoidal notch?
A notch/hole for the ethmoid bone to fit into
What is the glabella?
Smooth raised prominence between the eyebrows just above the bridge of the nose
Where does the glabella lie between?
Between the superciliary ridges
Where is the nasal spine (frontal spine) found?
At the anterior end of the ethmoidal notch
What is the nasal spine (frontal spine)?
Most superior part of the nasal septum
Which landmark of the frontal bone create a slight depression above each eyebrow?
Supraorbital groove (SOG)
Which landmark of the frontal bone marks the highest level of facial bone mass?
Supraorbital groove (SOG)
What landmark of the frontal bone is the superior rim of the orbit?
Supraorbital margin (SOM)
What landmark of the frontal bone is the ridge of the bone beneath each eyebrow?
Supercilliary ridge (Arch)
What landmark of the frontal bone is found at the most anterior end of the ethmoidal notch?
Nasal spine (frontal spine)
What landmark of the frontal bone is the most superior part of the nasal septum?
Nasal spine (fronal spine)
What landmark of the frontal bone is created for the ethmoid bone to fit into a notch?
Ethmoidal notch
What landmark of the frontal bone lies between the superciliary ridges?
Glabella
What landmark of the frontal bone is the smooth raised prominence between the eyebrows just above the bridge of the nose?
Glabella
How many parts does the occipital bone consist of and what are they?
- 4
- Squamous portion (aka squama)
- 2 occipital condyles
- Basilar portion
