Method for studying spinal evoked potentials]

The authors describe a new method of examing evoked spinal potentials. Derivation is by means of unipolar needle electrodes which are ventrolaterally introduced into the cervical disk space as far as the posterior longitudinal ligament. Detection of a spinal potential following the stimulation of brachial and crural nerves allows to exclude the possibility of complete transverse lesion of the spinal cord or severing of the peripheral nerve or plexus.