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Mar 8 2011, 10:35 PM EST (current) AndyC 177 words added
Mar 8 2011, 10:32 PM EST AndyC

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Bones of the Cranium


A) Frontal bone
  • Underlies the forehead and the superior margin and roof of the orbit and has a smooth median prominence called the glabella.
B) Parietal bone
  • Forms part of the superior and lateral surface of the skull.
C) Temporal bone
  • Consists of the squamous part , which is external to the lateral surface of the temporal lobe of the brain; the petrous part , which encloses the internal and middle ears; the mastoid part , which contains mastoid air cells; and the tympanic part , which houses the external auditory meatus and the tympanic cavity.
D) Occipital bone
  • Consists of squamous, basilar, and two lateral condylar parts.
  • Encloses the foramen magnum and forms the cerebral and cerebellar fossae.
E) Sphenoid bone
  • Consists of the body (which houses the sphenoid sinus), the greater and lesser wings, and the pterygoid process.
F) Ethmoid bone
  • Is located between the orbits and consists of the cribriform plate, perpendicular plate , and two lateral masses enclosing ethmoid air cells.

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