electromyography

initialism: EMG
https://doi.org/10.1351/goldbook.11745
Recording of the electrical activity of muscle, or its representation as a visual display or audible signal, using electrodes attached to the skin or inserted into a muscle.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 864 [Terms] [Paper]