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Cranial Bones
Table 7.3
7
Anatomy
10/03/2008
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Term
Frontal bones
 Definition

forms the forehead, the roofs of the orbits, and most of the anteior part of the cranial floor

Term
Parietal Bone
 Definition
forms the greater portion of the sides and roof of the cranial cavity
Term
Temporal bone
 Definition
forms the inferior lateral aspects of the cranium part of the cranial floor
Term
The occipital bone
 Definition
forms the posterior part and most of the case of the cranium
Term
Sphenoid bone
 Definition
called the keystone of the cranial floor because it articulates with all the other cranial bones, holding then together
Term
ethmoid bone
 Definition

part of the anterior portion of the cranial floor

the medial wall if the orbits

the superior portion of the nasal septum

most of the superior side walls of the nasal cavity

majuor superior supporting structure of the nasal cavity

Term
Cranial fossae
 Definition

Anterior cranial fossa - Frontal, ethmoid and lesser wings of sphenoid, frontal lobes of brain.

Middle cranial fossa - sphenoid, temporal and parietal, temporal lobes of brain.

Posterior cranial fossa - mostly occipital with temporal and parietal contributing, occipital lobes, cerebellum and posterior brainstem.