Hn nose: greater ventilatory demands...
From
littoral.homo@gmail.com@21:1/5 to
All on Tue Feb 28 02:56:13 2023
"Computer simulations show that Neanderthal facial morphology represents adaptation to cold and high energy demands, but not heavy biting":
3 adaptive hypotheses have been forwarded to explain the distinctive Hn face: i) an improved ability to accommodate high anterior bite forces,
ii) more effective conditioning of cold and/or dry air,
iii) adaptation to facilitate greater ventilatory demands. ...
We apply finite-element analysis FEA & computational fluid dynamics CFD
(the most comprehensive application of either approach applied to date, the first to include both)
to 3D models of Hn, Hs & a close outgroup H.heidelbergensis:
- FEA reveals few differences between H.heid., Hs & Hn in their capacities to sustain high anterior tooth loadings.
- CFD shows: Hn & Hs nasal cavities condition air more efficiently than H.heid.:
did Hn & Hs better withstand cold?dry climates than less derived Homo?
Hn could move considerably more air through the nasal pathway >H.heid., Hs:
did Hn facial morphology (vs our outgroup Homo) evolve to reflect improved capacities to
- better condition cold, dry air?
- move greater air volumes, in response to higher energetic requirements?
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:-)
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"Oi, big nose" 2010 New Scientist
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