Elicitation and abrupt termination of behaviorally significant catchlike tension in a primitive insect

Journal of Neurobiology
G Hoyle, L H Field

Abstract

Sustained steady contractural or catchlike tension (CT) occurs in the metathoracic extensor tibiae muscle of the primitive insect the weta (Orthoptera: Stenopelmatidae) during its characteristic leg-extension defense behavior or following leg-position conditioning. Similar action occurs occasionally in semi-intact preparations and is abruptly turned off by a single peripheral inhibitory impulse. These phenomena were reproduced routinely by first infusing saline containing 10(-8) M (or stronger) octopamine into the muscle for 12 min, and then stimulating the slow excitatory motor neuron SETi with a brief burst. Direct stimulation of the dorsal unpaired median neuron, innervating the extensor tibiae (DUMETi) prior to SETi stimulation, also led to CT. Both octopamine and DUMETi markedly enhanced the tension developed in response to a burst of impulses in SETi.

References

Sep 1, 1975·The Journal of Experimental Zoology·G Hoyle
Sep 1, 1975·The Journal of Experimental Zoology·G Hoyle, D L Barker
Jul 31, 1981·Science·M O'Shea, M E Adams
Jan 1, 1980·Journal of Neurobiology·G HoyleM Williams
Mar 1, 1982·The Journal of Physiology·P D Evans, M V Siegler
May 1, 1981·Journal of Neurobiology·C E Phillips
Jan 27, 1955·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·G HOYLE

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Citations

Jan 1, 1984·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·G Hoyle
Jun 27, 2014·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Harald Wolf
Aug 4, 2011·Journal of Insect Physiology·Hans-Joachim PflügerMargaret J Currie
Oct 1, 1994·Journal of Muscle Research and Cell Motility·D Günzel, W Rathmayer
Oct 9, 2004·The Journal of Experimental Biology·Hiroshi Nishino

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