In voluntary contraction of the skeletal muscles, the muscle potential ranges from ________(a) 50 uV – 5 mV(b) 50 mV – 5 V(c) 0.05 uV – 2 mV(d) 50 mV – 500 mVThe question was asked during an interview.This intriguing question originated from Electrodes for EMG topic in chapter Bioelectric Signal and Electrodes of Biomedical Instrumentation

In voluntary contraction of the skeletal muscles, the muscle potential

1.	In voluntary contraction of the skeletal muscles, the muscle potential ranges from ________(a) 50 uV – 5 mV(b) 50 mV – 5 V(c) 0.05 uV – 2 mV(d) 50 mV – 500 mVThe question was asked during an interview.This intriguing question originated from Electrodes for EMG topic in chapter Bioelectric Signal and Electrodes of Biomedical Instrumentation
Answer» The correct answer is (a) 50 uV – 5 mV To EXPLAIN I would say: In voluntary CONTRACTION of the skeletal MUSCLES, the muscle potential ranges from 50 uV – 5 mV and duration from 2 to 15 MS. The values vary with the anatomic position of the muscle and the SIZE and location of the electrode. In a relaxed muscle there are no action potentials.

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