A compound muscle action potential (CMAP) is a type of electromyography (EMG). CMAP refers to a group of almost simultaneous action potentials from several muscle fibers in the same area evoked by stimulation of the supplying motor nerve and are recorded as one multipeaked summated action potential. This abnormality refers to a greater than normal decrease in the amplitude during the course of the investigation. (Human Phenotype Ontology, HP_0003403)
7 genes associated with the emg: decremental response of compound muscle action potential to repetitive nerve stimulation phenotype by mapping known disease genes to disease phenotypes from the HPO Gene-Disease Associations dataset.