The central pattern generator controlling ventilation in the crab can generate two distinct motor programmes, which determine the direction of water flow during irrigation of the gills. An interneurone has been identified that depolarizes when the ventilatory motor output switches from forward to reverse ventilation and remains depolarized for the duration of the reverse motor programme. Depolarization of this neurone by intracellular current injection causes a switch in the motor programme from forward to reverse ventilation, which persists for the duration of the current step. Hyperpolarization of this cell during reverse ventilation terminates the reverse motor programme. The possible role of this reversal switch interneurone is considered in the context of the observed changes in the activity of other ventilatory interneurones and motor neurones during reverse ventilation.
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JOURNAL ARTICLE| 01 November 1990
An interneurone mediating motor programme switching in the ventilatory system of the crab
R. A. DiCaprio
Department of Zoological and Biomedical Sciences, Ohio University, Athens 45701.
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1990 by Company of Biologists
J Exp Biol (1990) 154 (1): 517–535.
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R. A. DiCaprio; An interneurone mediating motor programme switching in the ventilatory system of the crab. J Exp Biol 1 November 1990; 154 (1): 517–535. doi: https://doi.org/10.1242/jeb.154.1.517
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