External occipital protuberance

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External occipital protuberance
Human skull lateral view. External occipital protuberance shown in red.
Occipital bone seen from below. Outer surface. (External occipital protuberance visible at top center.)
Latin protuberantia occipitalis externa
Gray's subject #46 185

Near the middle of the occipital squama is the external occipital protuberance, and extending lateralward from it on either side is the superior nuchal line, and above this the faintly marked highest nuchal line.

It is less pronounced in females.[1]

The inion is the highest point of the external occipital protuberance.

A projection on the external surface of the squamous part of the occipital bone in the midline

Additional images

Position of external occipital protuberance (shown in red). Animation. 
Occipital bone. Position of external occipital protuberance shown in red. 
Human skull seen from below. Position of external occipital protuberance shown in red. 
Human skull seen from below. External occipital protuberance labelled at the bottom. 
Occipital bone replica of Homo erectus (400,000 years old) seen from behind. 

See also

References

  1. Gülekon, IN. "The external occipital protuberance: can it be used as a criterion in the determination of sex?". PubMed. National Center for Biotechnology Information. Retrieved 9 December 2013. 

External links

This article incorporates text from a public domain edition of Gray's Anatomy.

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