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cpv1a(GM) muscle tetanic rate of rise and amplitude increase as a result of previous activity. A, cpv1a (GM) muscle contractions in a rhythmic train of bursts (2.5 sec burst duration, 5 sec cycle period, 30 Hz spike frequency).B, Comparison of first and last contractions in the train shown in A; note rate of rise increase.C, Comparison of tetanic contractions induced before and after conditioning with a rhythmic train of trains; note rate of rise increase.
