SKULL

Frontal bone: Forms the ________ Contains the frontal ________ Forms the roof of the ________ Union with the parietal bones forms the ________ suture. _________, the midpoint of the frontnasal suture (where frontal bone meets nasal bones)

forehead sinuses orbits coronal nasion

The bones of the cranial vault is composed of two plates of compact tissue: ______ and ______ table(s). Both tables are separated by spongy tissue called: _______

inner outer diploe

What are the 6 incomplete ossification fontanels named? When does the fontanels close? When does the cranium grow the most? and when does it slow down in growth?

1 - anterior fontanel 1 - posterior fontanel 2 - sphenoid fontanel 3 - mastoid fontanel end of the 2nd year 5th or 6th year, then it slows and gradually grows to adult size

The cranium is made up of _____ bones. Name all the cranial bones:

8 1 - occipital 1 - frontal 1 - sphenoid 1 - ethmoid 2 - parietal 2 - temporal

What are the 3 internal regions of the cranium: ________ ________ ________: from frontal bone to lesser wings of sphenoid, contains frontal lobe ________ ________ ________: from lesser wing of sphenoid to petrous bone apices, contains temporal lobes ________ ________ ________: from petrous bones to occipital bone, protects cerebellum, pons and medulla oblongata

Anterior cranial fossa Middle cranial fossa Posterior cranial fossa

Cranial bones are further divided into the _______ and the ________. Name the bones in both subdivision: (8)

Clavaria 1 - frontal 1 - occipital 2 - parietal Floor 1 - ethmoid 1 - sphenoid 2 - temporal

__________ Bone: 1. Contain the external auditory meatus and middle and inner ear structures 2. Squamous portion: above the meatus; zygomatic process articulates with the zygomatic to form the zygomatic arch. 3. Petrous Portion: - Contains organs used for heating and equilibrium - Prominent elevation on the floor of the cranium 4. Mastoid Portion: - Protuberance behind the ear - Mastoid process 5. Mandibular Fossa: Articulates with the condyle on the mandible 6. Styloid Process: Anterior to the mastoid process; several neck muscles attach here. 7. Jugular Foramen: located between the petrous portion and the occipital bones; opening from which CN (cranial nerve) IX, CN, and CN XI exit.

Temporal

Name the junction(s) of the sutures: _______ - junction of the coronal and sagittal suture _______ - junction of the lambdoidal and sagittal suture _______ - junction of the parietal bone, squamosal suture & greater wing of the sphenoid _______ - junction of the occipital bone, parietal bone & mastoid portion of the temporal bone

bregma lambda pterion asterion

Name the suture(s): _______ - where the frontal bone joins the 2 parietal bones _______ - where the parietal bones meet in the midline. _______ - where the parietal bones meet the temporal bones on each side. _______ - where the parietal bones meet the occipital bone

coronal sagittal squamosal lambdoidal

Parietal Bone: 1. Union with occipital bone forms the _________ suture. 2. Union with temporal bone forms the ________ suture. 3. Union with sphenoid bone forms the ________ suture.

lambdoid squamous coronal

The average cranium is: _______ in shape _______ in back than in front _______ inches in width _______ inches in length _______ inches at its deepest point, from vertex to submental area

oval wider 6 7 9