These workers showed that electrical stimulation of the frontal cortex in various experimental animals caused movements of the extremities of the opposite side of the body, thus proving the existence of a motor area in the cerebral cortex, predicted earlier in the same year by Hughlings Jackson. Translation in J. Neurosurg., 1963, 20, 905-16. Reprinted, with translation, in R. H. Wilkins, Neurosurgical Classics, New York, 1965