Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.

Previous investigations have correlated vestibular function to locomotion in vertebrates by scaling semicircular duct radius of curvature to body mass. However, this method fails to discriminate bipedal from quadrupedal non-avian dinosaurs. Because they exhibit a broad range of relative head sizes,...

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Autores principales:	Justin A Georgi, Justin S Sipla, Catherine A Forster
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/342554b4bb824ea5b8136bbaa66885f9
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spelling	oai:doaj.org-article:342554b4bb824ea5b8136bbaa66885f92021-11-18T07:53:38ZTurning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.1932-620310.1371/journal.pone.0058517https://doaj.org/article/342554b4bb824ea5b8136bbaa66885f92013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23516495/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Previous investigations have correlated vestibular function to locomotion in vertebrates by scaling semicircular duct radius of curvature to body mass. However, this method fails to discriminate bipedal from quadrupedal non-avian dinosaurs. Because they exhibit a broad range of relative head sizes, we use dinosaurs to test the hypothesis that semicircular ducts scale more closely with head size. Comparing the area enclosed by each semicircular canal to estimated body mass and to two different measures of head size, skull length and estimated head mass, reveals significant patterns that corroborate a connection between physical parameters of the head and semicircular canal morphology. Head mass more strongly correlates with anterior semicircular canal size than does body mass and statistically separates bipedal from quadrupedal taxa, with bipeds exhibiting relatively larger canals. This morphologic dichotomy likely reflects adaptations of the vestibular system to stability demands associated with terrestrial locomotion on two, versus four, feet. This new method has implications for reinterpreting previous studies and informing future studies on the connection between locomotion type and vestibular function.Justin A GeorgiJustin S SiplaCatherine A ForsterPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 3, p e58517 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Justin A Georgi Justin S Sipla Catherine A Forster Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
description	Previous investigations have correlated vestibular function to locomotion in vertebrates by scaling semicircular duct radius of curvature to body mass. However, this method fails to discriminate bipedal from quadrupedal non-avian dinosaurs. Because they exhibit a broad range of relative head sizes, we use dinosaurs to test the hypothesis that semicircular ducts scale more closely with head size. Comparing the area enclosed by each semicircular canal to estimated body mass and to two different measures of head size, skull length and estimated head mass, reveals significant patterns that corroborate a connection between physical parameters of the head and semicircular canal morphology. Head mass more strongly correlates with anterior semicircular canal size than does body mass and statistically separates bipedal from quadrupedal taxa, with bipeds exhibiting relatively larger canals. This morphologic dichotomy likely reflects adaptations of the vestibular system to stability demands associated with terrestrial locomotion on two, versus four, feet. This new method has implications for reinterpreting previous studies and informing future studies on the connection between locomotion type and vestibular function.
format	article
author	Justin A Georgi Justin S Sipla Catherine A Forster
author_facet	Justin A Georgi Justin S Sipla Catherine A Forster
author_sort	Justin A Georgi
title	Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
title_short	Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
title_full	Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
title_fullStr	Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
title_full_unstemmed	Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
title_sort	turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/342554b4bb824ea5b8136bbaa66885f9
work_keys_str_mv	AT justinageorgi turningsemicircularcanalfunctiononitsheaddinosaursandanovelvestibularanalysis AT justinssipla turningsemicircularcanalfunctiononitsheaddinosaursandanovelvestibularanalysis AT catherineaforster turningsemicircularcanalfunctiononitsheaddinosaursandanovelvestibularanalysis
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Turning semicircular canal function on its head: dinosaurs and a novel vestibular analysis.

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