Along the internal surface of the occipital bone, at the point of intersection of the four divisions of the cruciform eminence, is the internal occipital protuberance. Running transversely on either side is a groove for the transverse sinus.

• External occipital protuberance

This article incorporates text in the public domain from page 130 of the 20th edition of Gray's Anatomy (1918)

Wikimedia Commons has media related to Internal occipital protuberance.

• "Anatomy diagram: 34257.000-2". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2013-06-22.
• Diagram at uni-mainz.de Archived 2008-03-28 at the Wayback Machine

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