Modulatory effects of proctolin on a crab ventilatory muscle.
Proctolin enhances nerve-evoked, phasic contractions of a selected respiratory muscle of the shore crab, Carcinus maenas, but has no effect on muscle tonus. Proctolin also increases the work and power output of this muscle. These effects are functionally appropriate in view of previous reports that proctolin stimulates the ventilatory rhythm. They also suggest that proctolin exerts coordinated modulatory control at the central and peripheral levels of the gill ventilatory system. In contrast, serotonin, dopamine and octopamine have no effect on this muscle.[1]References
- Modulatory effects of proctolin on a crab ventilatory muscle. Mercier, A.J., Wilkens, J.L. J. Neurobiol. (1985) [Pubmed]
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