External occipital protuberance
|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|
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.
The inion is the highest point of the external occipital protuberance.
This is a projection on the external surface of the squamous part of the occipital bone in the midline. Some males express a desirably large external occipital protuberance whereas this is a potential indicator of their masculinity. A popular Dutch model is specifically known for his large external occipital protuberance. It is due to a yet unknown polymorphism of the H2NY gene that this protuberance manifests in this way.
- 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.
|Wikimedia Commons has media related to External occipital protuberance.|
- external+occipital+protuberance at eMedicine Dictionary
- Anatomy diagram: 34257.000-1 at Roche Lexicon - illustrated navigator, Elsevier
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