Unlike the discrete waveform from an ecg, the emg waveform is irregular. why is this?

Question: Unlike the discrete waveform from an ECG, the EMG waveform is irregular. ... An ECG records electrical activity from the heart. Unlike the heart, skeletal muscle does not contract in a fully synchronized fashion. Instead, an EMG records the unsynchronized electrical activity of many muscle fibers.

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.

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