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Journal of Experimental Biology, Vol 87, Issue 1 121-136, Copyright © 1980 by Company of Biologists

JOURNAL ARTICLES

Neural interactions controlling timing of flight muscle activity in Drosophila

JH Koenig and K Ikeda

Simultaneous intracellular recordings were made from the six ipsilateral dorsal longitudinal muscle fibres of Drosophila in stationary flight. The influence of the firing of one motor unit upon the firing of another was analysed by observing the relationship between the interspike interval of a unit and the relative firing times of the other motor units within that interval. The analysis suggests that the influence is insignificant except when one unit would have fired soon after another. Then, a neural interaction occurs that can cause a unit to fire either earlier or later, depending on its firing relationship with the other units. Thus, the observation that no DLM fibre fires soon after another is the result of both a delaying effect and an effect which causes a cell to fire earlier than it normally would have fired.


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© The Company of Biologists Ltd 1980