Results 251 to 260 of about 42,262 (295)
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Loss of air sacs improved hominin speech abilities
Journal of Human Evolution, 2012In this paper, the acoustic-perceptual effects of air sacs are investigated. Using an adaptive hearing experiment, it is shown that air sacs reduce the perceptual effect of vowel-like articulations. Air sacs are a feature of the vocal tract of all great apes, except humans.
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Low-tone air-bone gaps after endolymphatic sac surgery
Auris Nasus Larynx, 2011We detected chronic low-tone air-bone gaps (LTABGs) in some patients with Meniere's disease after endolymphatic sac surgery. The aim of the present study was to elucidate the mechanism of LTABGs after endolymphatic sac surgery.We investigated 50 patients with Meniere's disease, who underwent surgery more than two years prior. LTABGs were defined as the
Tadashi, Kitahara +6 more
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Ring-Stabilization Technique for Collection of Avian Air Sacs
American Journal of Veterinary Research, 1980SUMMARY Histologic features of chicken air-sac membranes harvested with rings were compared with those of membranes collected on cards. Ring stabilization of the tissues throughout fixation, dehydration, and embedment was found to reduce markedly the artifacts and the loss of normal tissue architecture observed within the wall of card-collected air ...
D W, Trampel, O J, Fletcher
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Incomplete gas mixing in air sacs of the duck
Respiration Physiology, 1980During normal breathing, the CO2 concentration in caudal air sacs of birds is higher, and the O2 concentration lower, than expected on the basis of the known air flow pattern. We have experimentally tested two hypotheses which could explain this finding: (1) Preferential shunting of re-inspired dead space gas into caudal air sacs; (2) Incomplete mixing
J R, Torre-Bueno, J, Geiser, P, Scheid
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Development of the Laryngeal Air Sac in Chimpanzees
International Journal of Primatology, 2007Though many nonhuman primates possess a laryngeal sac, the great apes are unique in their great size. Though an enlarged sac probably arose in their common ancestor, its functional adaptations remain a matter of debate. Its development in extant great apes is likely to provide valuable information to clarify the issue.
Takeshi Nishimura +3 more
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Air sacs insufficient for penguin pressure protection
Journal of Experimental Biology, 2015![Figure][1] Emperor penguin at Cape Washington, Antarctica. Photo credit: Paul Ponganis. Anyone who has tried diving will know the uncomfortable feeling of water pressing on their ears.
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
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