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"I was precisely the first one, some thirty or more years ago, to confirm by physiological experiments and to define more closely that which Hughlings Jackson had concluded from clinical facts."(E. Hitzig,Brain23:545, 1900.) "The objects I had in view in undertaking the present research were twofold: first to put to experimental proof the views entertained by Dr. Hughlings Jackson.... I regard these researches as an experimental confirmation of the views expressed by him. They are, as it were, an artificial reproduction of the experiments produced by disease, and the clinical conclusions which Dr. Jackson has arrived at from his observations of disease are in all essential particulars confirmed by the above experiments."(D. Ferrier, cf.Selected Writings of J. H. Jackson, 1931, 1, ix.)
F. M. R. Walshe (Tue,) studied this question.