Sputtering positive potentials in the EMG: an artifact resembling positive waves.
Sputtering positive potentials (SPPs) in the electromyogram are small, irregularly occurring waveforms recorded in normal distal muscles. They represent cannula-recorded "nerve" potentials, but may be mistaken for the positive waves seen in denervation. Differences in amplitude, regularity, and duration help in distinguishing SPPs.
D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004576:Electromyography; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009045:Motor Endplate / Q000502:physiology; D009121:Muscle Denervation; D009132:Muscles / Q000294:innervation / Q000502:physiology*