The most prominent projecting point of the occipital bone at the base of the skull.
[Greek īnion, occipital bone, from īs, īn-, sinew, fiber.]
inion
Dictionary:
in·i·on (ĭn'ē-ən)  |
n.
The most prominent projecting point of the occipital bone at the base of the skull.
The most prominent projecting point of the occipital bone at the base of the skull.
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| Dental Dictionary: inion |
(in'ē-on)
n
n
The most elevated point on the external occipital protuberance in the midsagittal plane.
| Veterinary Dictionary: inion |
The most prominent point on the external occipital protuberance.
| Wikipedia: Inion |
| 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 |
The inion is the most prominent projection of the occipital bone at the posterioinferior (lower rear) part of the skull. The ligamentum nuchae and trapezius muscle attach 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.
Contents |
Etymology
The word "inion" is the Greek word for the occipital bone.
Anatolian bump
An Anatolian bump is a protuberance on the back of the skull said to be related to Asian ancestry, it is an unusually large external occipital protuberance.
Additional images
 Base of skull. Inferior surface. |
 Relations of the brain and middle meningeal artery to the surface of the skull. |
References
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Copyrights:
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more |
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| Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more |
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| Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more |
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| Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Inion". Read more |
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