External occipital protuberance
| External occipital protuberance | |
|---|---|
| File:External occipital protuberance - lateral view2.png Human skull lateral view. External occipital protuberance shown in red. | |
| File:Gray129 External occipital protuberance.png Occipital bone seen from below. Outer surface. (External occipital protuberance visible at top center.) | |
| Details | |
| Identifiers | |
| Latin | protuberantia occipitalis externa |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion. The inion is the most prominent projection of the protuberance which is located at the posteroinferior (rear lower) part of the human skull. The nuchal ligament and trapezius muscle attach to it.
The inion (ἰνίον, iníon, Greek for the occipital bone) is used as a landmark in the 10-20 system in electroencephalography (EEG) recording. Extending laterally from it on either side is the superior nuchal line, and above it is the faintly marked highest nuchal line.
A study of 16th-century Anatolian remains showed that the external occipital protuberance statistically tends to be less pronounced in female remains.[1]
Additional images
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Position of external occipital protuberance (shown in red). Animation.
See also
[edit | edit source]References
[edit | edit source]Public domain This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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External links
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- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- Bones of the Skull (Lateral View) Upstate Medical University
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