EMG abnormality EMG: axonal abnormality Electromyographic (EMG) findings characteristic of axonal neuropathy, with normal or slightly decreased nerve conduction velocities, normal or slightly prolonged distal latencies, but significantly reduced motor potentials and sensory amplitudes. There may be spontaneous activity upon needle EMG studies, such as increased insertional activity, positive sharp waves, and fibrillation potentials. HP:0003482 UMLS:C4025609 This is a bundled term that is kept for convenience. It is preferable to record the precise clinical observations.