These bones protect auditory nerves and a few ear structures that control hearing and balance.Ħ. However, unlike the previous, these are irregular bones. Temporal Bones: A paired bone, located under each of the parietal bones. Ethmoid Bone: Another unpaired irregular bone located in front of the sphenoid bone that forms a part of the nasal cavity.ĥ. It protects the brain lying underneath.Ĥ. Parietal Bones: A pair of flat bones located on either side of the head, just behind the frontal bone. It has an opening through which the spinal cord passes and connects to the brain.ģ. Occipital Bone: Another unpaired flat bone found at the back of the skull. Frontal Bone: An unpaired flat bone that makes up the forehead and upper part of the eye sockets.Ģ. Here are the individual bones that form the neurocranium:ġ. Anatomically, it is divided into two parts:Ĭranial Roof: Also known as calvarium, this part of the neurocranium is formed by the frontal, occipital, and two parietal bones.Ĭranial Base: It is composed of the frontal, sphenoid, ethmoid, occipital, parietal, and temporal bones. The neurocranium is somewhat spherical, mostly resembling a baseball cap.
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