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The Organization and Role During Locomotion of the Proximal Musculature of the Cricket Foreleg : I. Anatomy and Innervation

Laurent, Gilles and Richard, Daniel (1986) The Organization and Role During Locomotion of the Proximal Musculature of the Cricket Foreleg : I. Anatomy and Innervation. Journal of Experimental Biology, 123 . pp. 255-283. ISSN 0022-0949.

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The structure of the proximal segments of the cricket (Gryllus bimaculatus) foreleg, together with the associated musculature and its innervation are described. The morphology of 50 motor neurones involved in the control of this musculature has been revealed using backfilling techniques with cobalt, horseradish peroxidase and Lucifer Yellow. The ‘ball and socket’ pleurocoxal joint is moved by three sets of anatomical antagonists (promotor-remotor, abductor-adductor, anterior-posterior rotator muscles) inserted on each side of the three axes of rotation. The axial coxotrochanteral joint is moved by the intrinsic levator and the depressor muscles; these depressors are composed of an intrinsic (coxotrochanteral) and a ‘double’ (pleurotrochanteral) subgroup. The double depressors, and all the muscles inserting on the trochantin (promotors) or the anterior coxal rim (adductor, abductors, anterior rotators) are supplied by at least eighteen neurones, whose axons run in nerve 3. The muscles that insert on the posterior coxal rim (remotors, posterior rotators) are innervated by at least twelve similar neurones whose axons run in nerve 4. The intrinsic coxal muscles are supplied by branches of nerve 5 (ten motor neurones to the levators, two to the depressors). Three presumably common inhibitors, and one Dorsal Unpaired Median (DUM) neurone have also been found.

Item Type:Article
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Laurent, Gilles0000-0002-2296-114X
Additional Information:Published by Company of Biologists 1986. Accepted 24 February 1986. We are grateful to Malcolm Burrows, Claire Hill-Venning, Melody Siegler and Alan Watson for their critical reading of and many suggestions on the manuscript, and to Fiona Howarth for so kindly typing it through its successive phases. This work has been supported by the Fondation pour la Recherche Médicale.
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Fondation pour la Recherche MédicaleUNSPECIFIED
Subject Keywords:cricket, leg muscles, motor neurones
Record Number:CaltechAUTHORS:LAUjeb86a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11659
Deposited By: Archive Administrator
Deposited On:17 Sep 2008 07:01
Last Modified:03 Oct 2019 00:21

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