A flexible lever system for quantitative measurements of mammalian muscle dynamics’

for quantitatiue measurements of mammalian muscle gvnamics. J. Appl. Physiol. 2 I (4) : I 42 I-I 426. I 966.~The design of a lever system that is capable of performing a wide range of myometric experiments is described. The system consists of an electromag-netic torque source, lightweight magnesium lever member, direct velocity transducer coil, and force transducer. By regu-lating the current supplied to the torque source, isometric, iso-tonic, constant velocity, and quick release-stretch experiments can be performed with the same basic lever system.This flexibil-ity was not found in the conventional lever systems described in the literature. The over-all performance characteristics of this system have been shown by experimental data. electromagnetic force generator; instantaneous velocity trans-ducer; isotonic, isometric, and constant velocity contraction measurement; quick releas