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Published July 1983 | Published
Journal Article Open

Giant Fibre Activation of Direct Flight Muscles in Drosophila


1. Electrical stimuli delivered to the brain were used to activate the giant fibre of Drosophila. 2. The giant fibre drove a prominent wing opening movement. 3. Intracellular microelectrode recordings from direct wing opener muscle fibres showed that giant fibre activation of an anterior pleural muscle, pa3, was responsible for the wing opening movement. 4. The giant fibre drove a slight wing elevation movement. 5. Intracellular recordings from direct wing elevator muscle fibres showed that these muscles were not activated by the giant fibre. 6. It is suggested that giant fibre-driven wing elevation movements were mediated by the tergotrochanter muscle (TTM).

Additional Information

© 1983 The Company of Biologists Limited. Received 2 September 1982; Accepted 14 March 1983. We thank Dr Seymour Benzer for the use of his facilities and his support during these experiments. We thank our colleagues Drs L. Kauvar, S. Shotwell, B. Tempel, T. Venkatesh, C.-F. WuandL. Zipursky for discussion. This research was supported by National Science Foundation Grant PCM 7911771 to S. Benzer and the Pew Memorial Trust. M. A. T. was supported by National Institutes of Health Training Grant GM 7401-02.

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