The cranial venous sinus system in Australopithecus afarensis

@article{Falk1983TheCV,
  title={The cranial venous sinus system in Australopithecus afarensis},
  author={D. Falk and G. Conroy},
  journal={Nature},
  year={1983},
  volume={306},
  pages={779-781}
}
An enlarged occipital-marginal venous sinus system occurs in much higher frequencies in cranial remains of robust australopithecines and Australopithecus afarensis than in crania representing other fossil or extant hominids. A detailed functional interpretation of this ‘accessory’ sinus system is suggested here. Such a system would have permitted blood to flow preferentially to either the vertebral or the internal jugular system, depending on postural and respiratory changes, and thus provides… Expand
Evolution of cranial blood drainage in hominids: enlarged occipital/marginal sinuses and emissary foramina.
  • D. Falk
  • Biology, Medicine
  • American journal of physical anthropology
  • 1986
TLDR
The findings suggest that selection for bipedalism initially resulted in epigenetic adaptations for routes to deliver blood to the vertebral plexus including an enlarged O/M sinus system and hypoglossal canals, but that the pressures underlying these adaptations relaxed as bipedALism became established. Expand
Evidence for a dual pattern of cranial venous sinuses on the endocranial cast of Taung (Australopithecus africanus).
  • P. Tobias, D. Falk
  • Biology, Medicine
  • American journal of physical anthropology
  • 1988
TLDR
This report describes, for the first time, an enlarged occipital-marginal sinus system on the endocranial cast of the Taung specimen, which is part of the holotype of A. africanus. Expand
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TLDR
The senior author has concluded that, in these Ethiopian hominids as well, the shape of the foramen magnum was most probably cardioid, and the remarkable association of enlarged occipital and marginal sinuses and of cardioid foramina magna is proposed. Expand
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The Radiator Theory is the evolution of the functionally efficient brain cooling system, fixed in the A. robustus lineage, tying hydrostatic consequences of bipedalism with release of a “thermal constraint” on the encephalizing brain, and reflected in the authors' own ontogeny. Expand
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TLDR
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