[Use of local electromyography for revealing conductivity along efferent pathways in patients with traumatic lesions of the spinal cord ].

Electrical activity of the gastrocnemius and of the tibial muscles were examined in the patients with the spinal cord trauma during the active strain to extend or to flex the foot; action potentials of the motor units (MU) were recorded in a number of these patients during the mentioned volumtary efforts, despite the absence of interference electromyogram (EMG). A voluntary MU activation led to the conclusion on a possibility of detection by the local EMG method of the efferent conductivity partially persisting after the trauma along the spinal cord route.