Effect of prolonged inactivity on skeletal motor nerve terminals during aestivation in the burrowing frog, Cyclorana alboguttata

Hudson, N. J., Lavidis, N. A., Choy, P. T. and Franklin, C. E. (2005) Effect of prolonged inactivity on skeletal motor nerve terminals during aestivation in the burrowing frog, Cyclorana alboguttata. Journal of Comparative Physiology A-neuroethology Sensory Neural And Behavioral Physiology, 191 4: 373-379. doi:10.1007/s00359-004-0593-5


Author Hudson, N. J.
Lavidis, N. A.
Choy, P. T.
Franklin, C. E.
Title Effect of prolonged inactivity on skeletal motor nerve terminals during aestivation in the burrowing frog, Cyclorana alboguttata
Journal name Journal of Comparative Physiology A-neuroethology Sensory Neural And Behavioral Physiology   Check publisher's open access policy
ISSN 0340-7594
Publication date 2005-01-01
Sub-type Article (original research)
DOI 10.1007/s00359-004-0593-5
Volume 191
Issue 4
Start page 373
End page 379
Total pages 7
Editor F.G. Barth
Place of publication Germany
Publisher Springer-Verlag
Language eng
Subject C1
270604 Comparative Physiology
780105 Biological sciences
Abstract This study examined the effect of prolonged inactivity, associated with aestivation, on neuromuscular transmission in the green-striped burrowing frog, Cyclorana alboguttata. We compared the structure and function of the neuromuscular junctions on the iliofibularis muscle from active C. alboguttata and from C. alboguttata that had been aestivating for 6 months. Despite the prolonged period of immobility, there was no significant difference in the shape of the terminals (primary, secondary or tertiary branches) or the length of primary terminal branches between aestivators and non-aestivators. Furthermore, there was no significant difference in the membrane potentials of muscle fibres or in miniature end plate potential (EPP) frequency and amplitude. However, there was a significant decrease in evoked transmitter release characterised by a 56% decrease in mean EPP amplitude, and a 29% increase in the failure rate of nerve terminal action potentials to evoke transmitter release. The impact of this suite of neuromuscular characteristics on the locomotor performance of emergent frogs is discussed.
Keyword Neurosciences
Physiology
Zoology
Inactivity
Aestivation
Frog
Neuromuscular Junction
Neuromuscular-junctions
Metabolic Depression
Seasonal-changes
Rana-pipiens
Muscle
Secretion
Release
Neobatrachus
Transmitter
Sensitivity
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 15:25:37 EST