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- Q2940726 subject Q7010962.
- Q2940726 abstract "The Sagittal keel (torus) is a thickening of bone on part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones. Sagittal keels differ from sagittal crests, which are found in some earlier hominins (notably the genus Paranthropus) and in a range of other mammals. While a proper crests functions in anchoring the muscles of mastication to the cranium, the keel is lower and rounded in cross-section, and the jaw muscles do not attach to it.Sagittal keels occur in several early human species, most noticeably in Homo erectus and occasionally in Homo heidelbergensis. Most Homo sapiens groups have lost them, likely as part of the general trend toward thinning of the cranial bones to make room for larger brains during the Pleistocene. However there is a very small portion of modern humans who have this, but its function and etiology are unknown. Patrick Stewart of Star Trek: The Next Generation and the martial artist Shi Yan Ming present good examples of modern humans (Homo sapiens sapiens) with this feature. The keel appear to be tied to general cranial robusticity, and are more common in adult men than in women, and absent in children.".
- Q2940726 thumbnail Skull_pekingman.jpg?width=300.
- Q2940726 wikiPageWikiLink Q101362.
- Q2940726 wikiPageWikiLink Q105784.
- Q2940726 wikiPageWikiLink Q111463.
- Q2940726 wikiPageWikiLink Q156318.
- Q2940726 wikiPageWikiLink Q15978631.
- Q2940726 wikiPageWikiLink Q16290.
- Q2940726 wikiPageWikiLink Q16295.
- Q2940726 wikiPageWikiLink Q16296.
- Q2940726 wikiPageWikiLink Q16298.
- Q2940726 wikiPageWikiLink Q2080241.
- Q2940726 wikiPageWikiLink Q2232942.
- Q2940726 wikiPageWikiLink Q25546.
- Q2940726 wikiPageWikiLink Q286978.
- Q2940726 wikiPageWikiLink Q5891007.
- Q2940726 wikiPageWikiLink Q7010962.
- Q2940726 wikiPageWikiLink Q775482.
- Q2940726 comment "The Sagittal keel (torus) is a thickening of bone on part or all of the midline of the frontal bone, or parietal bones where they meet along the sagittal suture, or on both bones. Sagittal keels differ from sagittal crests, which are found in some earlier hominins (notably the genus Paranthropus) and in a range of other mammals.".
- Q2940726 label "Sagittal keel".
- Q2940726 depiction Skull_pekingman.jpg.