Evidence for peripheral inhibition in an arachnid muscle

Summary Blectrophysiological investigations on the promotor tibiae muscle in the tarantulaDugesiella hentzi showed for the first time the existence of peripheral inhibition in an arachnid. The observed effects of GABA and picrotoxin are similar to those in crustacean and insect muscle.This investigation was supported by grants No. Ra 113/4 to Prof. W. Rathmayer and SFB 138 of the Deutsche Forschungsgemeinschaft.I thank Professors W. Rathmayer and E. Florey and Mr. C. Kleinsteuber for their support during various stages of this work.