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Directional Sensitivity and Mechanical Coupling Dynamics of Campaniform Sensilla During Chordwise Deformations of the Fly Wing

Dickinson, Michael H. (1992) Directional Sensitivity and Mechanical Coupling Dynamics of Campaniform Sensilla During Chordwise Deformations of the Fly Wing. Journal of Experimental Biology, 169 (1). pp. 221-233. ISSN 0022-0949.

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The complex morphology of an insect campaniform sensillum is responsible for transforming strains of the integument into a displacement of the campaniform dome and subsequently a deformation of the dendritic membrane. In this paper, the first step in this coupling process was investigated in identified campaniform sensilla on the wing of the blowfly by stimulating the sensilla with chord-wise deflections of the wing blade. Campaniform sensilla neurones were sensitive to both dorsal and ventral deflections of the wing, and thus exhibited no strong directional sensitivity to the chord-wise components of wing deformation. These results are consistent with a simplified mechanical model in which the wing veins act as cylinders that undergo bending and torsion during chord-wise wing deformation. By comparing the responses of campaniform neurones to chord-wise deflections of the wing with those evoked by direct punctate stimulation of the dome, it is possible to estimate the dynamic properties of the coupling process that links wing deformation to dome deformation. In the identified campaniform neurone examined, wing-dome coupling attenuates high frequencies and transforms the chord-wise deflections of the wing into dome deformation similar in degree of excitation to that caused by direct punctate indentions that are two or more orders of magnitude smaller in size.

Item Type:Article
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Dickinson, Michael H.0000-0002-8587-9936
Additional Information:© 1992 Company of Biologists Limited. Accepted 14 April 1992. I wish to thank Andy Biewener, John Palka, Tom Daniel and Bob Pinter for their comments and suggestions with this project. This work was supported by a NSF Graduate Fellowship, and NSF Grant BNS-8507460 to John Palka.
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NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords:mechanoreceptors, mechanical coupling, fly wings, Calliphora vomitoria
Issue or Number:1
Record Number:CaltechAUTHORS:20120315-131641123
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29732
Deposited By: Tony Diaz
Deposited On:20 Mar 2012 21:58
Last Modified:03 Oct 2019 03:44

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