DSpace Repository

Recent origin of low trabecular bone density in modern humans

Show simple item record

dc.contributor.author Chirchir, Habiba en
dc.contributor.author Kivell, Tracy L. en
dc.contributor.author Ruff, Christopher B. en
dc.contributor.author Hublin, Jean-Jacques en
dc.contributor.author Carlson, Kristian J. en
dc.contributor.author Zipfel, Bernhard en
dc.contributor.author Richmond, Brian G. en
dc.date.accessioned 2015-04-20T15:15:19Z
dc.date.available 2015-04-20T15:15:19Z
dc.date.issued 2014
dc.identifier.citation Chirchir, Habiba, Kivell, Tracy L., Ruff, Christopher B., Hublin, Jean-Jacques, Carlson, Kristian J., Zipfel, Bernhard, and Richmond, Brian G. 2014. "Recent origin of low trabecular bone density in modern humans." <em>Proceedings of the National Academy of Sciences of the United States of America</em>. 112 (2):366&ndash;371. <a href="https://doi.org/10.1073/pnas.1411696112">https://doi.org/10.1073/pnas.1411696112</a> en
dc.identifier.issn 0027-8424
dc.identifier.uri http://hdl.handle.net/10088/25194
dc.description.abstract Humans are unique, compared with our closest living relatives (chimpanzees) and early fossil hominins, in having an enlarged body size and lower limb joint surfaces in combination with a relatively gracile skeleton (i.e., lower bone mass for our body size). Some analyses have observed that in at least a few anatomical regions modern humans today appear to have relatively low trabecular density, but little is known about how that density varies throughout the human skeleton and across species or how and when the present trabecular patterns emerged over the course of human evolution. Here, we test the hypotheses that (i) recent modern humans have low trabecular density throughout the upper and lower limbs compared with other primate taxa and (ii) the reduction in trabecular density first occurred in early Homo erectus, consistent with the shift toward a modern human locomotor anatomy, or more recently in concert with diaphyseal gracilization in Holocene humans. We used peripheral quantitative CT and microtomography to measure trabecular bone of limb epiphyses (long bone articular ends) in modern humans and chimpanzees and in fossil hominins attributed to Australopithecus africanus, Paranthropus robustus/early Homo from Swartkrans, Homo neanderthalensis, and early Homo sapiens. Results show that only recent modern humans have low trabecular density throughout the limb joints. Extinct hominins, including pre-Holocene Homo sapiens, retain the high levels seen in nonhuman primates. Thus, the low trabecular density of the recent modern human skeleton evolved late in our evolutionary history, potentially resulting from increased sedentism and reliance on technological and cultural innovations. en
dc.relation.ispartof Proceedings of the National Academy of Sciences of the United States of America en
dc.title Recent origin of low trabecular bone density in modern humans en
dc.type Journal Article en
dc.identifier.srbnumber 133395
dc.identifier.doi 10.1073/pnas.1411696112
rft.jtitle Proceedings of the National Academy of Sciences of the United States of America
rft.volume 112
rft.issue 2
rft.spage 366
rft.epage 371
dc.description.SIUnit NH-Anthropology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 366
dc.citation.epage 371


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account

Statistics