1) Kawaguchi M, Furuya H: Intraoperative spinal cord monitoring of motor function with myogenic motor evoked potentials: a consideration in anesthesia. J Anesth 18: 18-28, 2004
2) MacDonald DB: Intraoperative motor evoked potential monitoring: overview and update. J Clin Monit Comput 20: 347-377, 2006
3) Patton HD, Amassian VE: Single and multiple-unit analysis of cortical stage of pyramidal tract activation. J Neurophysiol 17: 345-363, 1954
4) Merton PA, Morton HB: Stimulation of the cerebral cortex in the intact human subject. Nature 285: 227, 1980
5) Taniguchi M, Cedzich C, Schramm J: Modification of cortical stimulation for motor evoked potentials under general anesthesia: technical description. Neurosurgery 32: 219-226, 1993