A technique for recording the EMG of electrically stimulated skeletal muscle.
A technique for recording the myoelectric activity of electrically stimulated muscle through its motor nerve without the interference of stimuli artifacts has been developed and tested. The technique consists of a wide band differential amplifier with fine intramuscular wire electrodes. The amplified signal is passed through a Chebyshev low pass filter with eight poles at a frequency of 550 Hz. A stimulus calibration study shows that low frequency stimuli had negligible effect on the EMG when set below three times suprathreshold. A test procedure shows artifact-free EMG during action potential rate stimulation as well as during superimposed high frequency recruitment stimulation.
D000200:Action Potentials; D000818:Animals; D002415:Cats; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D004576:Electromyography / Q000379:methods*; D006614:Hindlimb; D009046:Motor Neurons / Q000502:physiology; D009119:Muscle Contraction; D009132:Muscles / Q000294:innervation / Q000502:physiology*