Inion
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| Bone: Inion | ||
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| Side view of head, showing surface relations of bones. (Inion visible at center right.) | ||
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| Occipital bone. Outer surface. (External occipital protuberance visible at top center.) | ||
| Gray's | subject #46 185 | |
| Dorlands/Elsevier | i_08/12452346 | |
The inion is the most prominent projection of the occipital bone at the lower rear part of the skull. The ligamentum nuchae and trapezius muscle attaches to it.
The term external occipital protuberance (protuberantia occipitalis externa) is sometimes used as a synonym, but more precisely the term "inion" refers to the highest point of the external occipital protuberance.
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[edit] Etymology
The word "inion" is the Greek word for the occipital bone.
[edit] See also
[edit] Additional images
 Base of skull. Inferior surface. |
 Relations of the brain and middle meningeal artery to the surface of the skull. |
[edit] External links
- Diagram at gtec.at
- Dorlands/Elsevier p_38/12673891 - "external occipital protuberance"
- Dictionary at eMedicine external+occipital+protuberance
- Roche Lexicon - illustrated navigator, at Elsevier 34257.000-1
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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