LOINC long common name : Spontaneous activity.positive sharp waves of Muscle on EMG;
LOINC short name : Spont activity.PSWs Muscle EMG;
LOINC description : Positive sharp waves occur when the needle tip damages a muscle fiber, which causes
a spontaneous action potential to propagate up to the needle tip. These are similar
to muscle fibrillation and also occur in acutely denervated fibers. [PMID: 15961866];