A low pass filter with amplifier for measurement of active and passive tensions of skeletal muscle in vitro.
When displaying and measuring passive and active twitch tensions developed by skeletal muscle in vitro, the problems of amplification may be resolved by recording two traces. One, recorded at relatively low gain, is used for measurements of twitch tension amplitude. The other, recorded simultaneously, is a modified version of the first trace, in which the voltage signals are passed through a suitably constructed low pass filter, amplified and displayed. This second trace, recorded at relatively high gain, is used for measurements of changes in passive tension and contracture responses of relatively small amplitude.
D000669:Amplifiers, Electronic; D066298:In Vitro Techniques; D008722:Methods; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*