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Increase in median power frequency of the myoelectric signal in pathological fatigue
J P Braakhekke1, D F Stegeman, E M Joosten
1Institute of Neurology, University Hospital Nijmegen, The Netherlands.
Electroencephalography and Clinical Neurophysiology
|August 1, 1989
Abstract:
During bicycle ergometry, surface EMG analysis was performed on the m. vastus lateralis in a patient with pathological fatigue (due to skeletal muscle carnitine deficiency). With prolonged, submaximal, exercise (30% VO2 max, 2 h) the median frequency of the power density spectrum increased, despite fatigue and lactate production. This observation questions the general validity of the present concepts on myoelectric aspects of fatigue.