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Occipital bone

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OCCIPITAL BONE ANATOMY

The base of the skull, along with the majority of the posterior portion of the skull, is comprised of a single bone known as the occipital bone. With the parietal bones meeting at the lambdoid suture, it creates that final curvature at the base of the head.

OCCIPITAL BONE STRUCTURE

This bone also has a large opening for the spinal cord to reach the brain stem, which is called the foramen magnum. Occipital condyles, which straddle either side of the foramen magnum, is where the atlas or first vertebra meets with the vertebral column.

OCCIPITAL BONE DIAGRAM

Occipital bone
Image: Occipital Bone


The occipital condyle hosts along its anterior edge the hypoglossal canal. The hypoglossal canal permits passage of the hypoglossal nerve.

The occipital condyle lies just anterior of the codyloid canal. Just under the skin, the obvious and definite bump is the external occipital protuberance, which is a highly prominent projection at the posterior base of the skull.

Sutural bones, which are frequently occurring irregular bones throughout the lambdoid suture, are often clustered in small groups. The ridge that extends across from the occipital protuberance to the mastoid section of the temporal bone is known as the superior nuchal line.










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