ECG-related fasciculation potential.
We report the observation of an unusual fasciculation potential (FP). This FP was time-locked to the electrocardiogram (ECG) in 87% of the discharges. The motor unit action potential (MUAP) of the FP was also elicited as H-reflex. As mechanism we propose spindle afferent discharges mechanically triggered by the arterial pulse, i.e. a reflex fasciculation. We suggest that such a heartbeat-related mechanism could explain synchronous fasciculations described by Norris (Arch. Neurol., 1965, 13: 495-500).
Roth
G
G
Department of Neurology, University Hospital, Geneva, Switzerland.
Egloff-Baer
S
S
D000200:Action Potentials; D000328:Adult; D004558:Electric Stimulation; D004562:Electrocardiography; D004594:Electrophysiology; D005207:Fasciculation / Q000503:physiopathology*; D006181:H-Reflex / Q000502:physiology; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000503:physiopathology; D009046:Motor Neurons / Q000502:physiology; D011930:Reaction Time