Variability of the Unique Fiber Potentials of a Spastic Muscle Treated With Botulinum Toxin

ENMG 5 channel Digital EMG, NCS and EP System, Neurosoft, Skybox. Amplification of the EMG signal BF 500 Hz, HF 3kHz, mains filter at 50 Hz. Acquisition at 2 ms at 100 µv, parameters can be modified. The single-use needle electrode (Neuroline Concentric, Neurology Needle Electrode; 25x0.30 mm(1''x30G)) of reference inserted into one elbow flexor muscle (biceps brachialis, anterior brachialis) on the parietal side with location of the ground reference. The paroetic arm will be supported by the evaluator in order to generate a minimal tone, necessary for the occurrence of potential actions of two muscle fibres present within the same motor unit.