Anatomy Flashcards
How many bones are in the cranium?
8
How many of the cranium bones are paired? Which ones?
2- Rt and Lt Parietal
Rt and Lt Temporal
What are all 8 cranium bones?
Frontal, 2 parietal, 2 temporal, sphenoid, ethmoid, occipital
What are the 4 bones that make up the skull cap?
Frontal
Parietal
Temporal
Occipital
What is another name for the skullcap?
Cal aria
Which bones make up the floor of the cranium?
Frontal Ethmoid Sphenoid Parietal Temporal Occipital
The slight depression above the eyebrows is known as what? Which bone is this a part of?
The supra orbital groove (SOG), Frontal
The superior rim of each orbit is known as what? Which bone is this a part of?
The supra orbital margin (SOM), Frontal
A small hole or opening within the supra orbital margin slightly medial to the midpoint is what? Which bone is this a part of?
Supra orbital notch/foramen, Frontal
What is the large rounded prominence of the frontal bone?
Frontal tuberosity
What is the superciliary ridge? Which bone is this a part of?
The interior arch of the top of the orbit, Frontal
Which bones articulate with the frontal bone?
Rt and Lt Parietal
Ethmoid
Sphenoid
The widest portion of the skull lies between what?
The parietal tubercles/eminences
What bones articulate with the parietal bones?
Frontal Occipital A temporal on each side Sphenoid Opposite parietal
Which portion of the occipital bone articulates with the atlas?
The occipital condyles
What are the 3 portions of the temporal bone?
- Mastoid portion
- Squamous portion
- Petrous portion
What is the thin upper portion of the temporal bone?
The squamous portion
The mastoid portion of the temporal bone contains what process?
The mastoid process
What is another nam of the petrous portion of the temporal bone?
The petrous ridges
What are the foramens associated with the interior portion of the temporal bones?
The rt and lt jugular foramens
The rt and lt internal acoustic meatus
Which cranial bones articulate with the temporal bone?
Parietal
Occipital
Sphenoid
What is the anchor for all of the cranial bones?
The sphenoid
What three foramen are a part of the sphenoid from anterior to posterior position?
Foramen rotundum
Foramen ovale
Foramen spinosum
Which gland is surrounded by the sella turcica?
The pituitary gland
What part of the spheniod is posterior to the sella turcica?
The dorsum sella
Which portion of the sphenoid bone forms a base of support for the pons?
The clivus
The feet of the sphenoid, or bat, are called what?
Lateral Pterygoid process and hamulus
Looking at the ethmoid bone from the coronal view, what are the 3 parts from superior to inferior?
Crista galli
Cribiform Plate
Perpendicular Plate
What are the large processes that extend laterally on the ethmoid bone?
Lateral Labyrinth (masses)
What do the lateral masses contain?
Ethmoid air cells or sinuses
What extends medially and downward from the lateral masses?
Superior and middle nasal concha or turbinates
Name the 4 cranial sutures.
- Coronal
- Lambdoidal
- Squamosal
- Sagittal
Name the 4 junction points on the cranium. (where each suture meets)
- Asterion
- Bregma
- Lambda
- Pterion
