ミミズ環状筋に刺激閾値について

概要

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The circular muscles of the earthworm were stimulated by rectangular current or condenser discharge current, and strength-duration or strengh-capacity relation were pursued. WEISS'S experimental formula was valid for rectangular current stimulation, and HOORWEG'S for condenser discharge stimulation. Chronaxie was measured, and its numerical value was 27.3±5.7 msec. From the experimental data, the authors could calculate HILL'S constant of local potential (k). In the case of rectangular current stimulation, k was 42.58±10.53 msec (determined by graphical method) or 39.43±10.56 msec (calculated from the value of chronaxie). When condenser discharge shock was used for stimulation, the value of k showed 138±21 msec (calculated from chronaxie) or 113±18 msec (measured experimentally). The theoretical formulae of HILL published in 1936 were valid for the authors' experimental results.
1952-11-15