Document Detail

Factors influencing the susceptibility of anurans to motion sickness.
MedLine Citation:
PMID:  15523999     Owner:  NLM     Status:  MEDLINE    
We examined the propensity for motion sickness in five anuran species, concentrating our efforts on the treefrog Rhacophorus schlegelii, because it had shown the greatest susceptibility to motion sickness in a previous study. We used parabolic flight as our provocative stimulus and fed all specimens a known volume of food 1.5-3 h before flight. The presence of vomitus in a frog's cage was our indicator of motion sickness. Significantly more emesis was observed in flight-exposed than in control R. schlegelii (P < 0.05). There was no sex difference in susceptibility to motion sickness (P > 0.5). Individuals that vomited were significantly larger (P < 0.02) than those that did not. Among microgravity-treated frogs, those that vomited spent on average 85% more time airborne and tumbling in microgravity than those that did not vomit (P=0.031). Our data support the view that postural instability and sensory conflict are elements of motion sickness in anurans. Specifically, conflicts between tactile, vestibular and visual input seem essential for producing motion-induced emesis in anurans. Since the factors that induce motion sickness in R. schlegelii are the same ones that produce motion sickness in humans, arboreal frogs may be useful alternative models to mammals in motion sickness research.
T Naitoh; R J Wassersug; N Yamashita
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of comparative physiology. A, Sensory, neural, and behavioral physiology     Volume:  187     ISSN:  -     ISO Abbreviation:  J. Comp. Physiol. A     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2004-11-04     Completed Date:  2004-11-16     Revised Date:  2014-07-21    
Medline Journal Info:
Nlm Unique ID:  8413199     Medline TA:  J Comp Physiol A     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  105-13     Citation Subset:  IM    
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MeSH Terms
Anura / physiology*
Flight, Animal*
Motion Sickness / physiopathology*,  veterinary*
Sex Factors
Vomiting / etiology,  veterinary*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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