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Abstract The chief contents of this paper are the results of an experimental investigation tending to prove that there is a localization of function in special regions of the cerebral hemispheres. In a former paper published by the author in the ‘West Riding Lunatic Asylum Medical Reports,’ vol. iii. 1873, the results were given of experiments on rabbits, cats, and dogs, made specially for the purpose of testing the theory of Hughlings Jackson, that localized and unilateral epilepsies are caused by irritation or “discharging lesions” of the grey matter of the hemispheres in the region of the corpus striatum. Besides confirming Hughlings Jackson’s views, the author’s researches indicated an exact localization in the hemispheres of centres, or regions, for the carrying out of simple and complex muscular movements of a definite character, and described by him as of a purposive, or expressional, nature.
David Ferrier (Thu,) studied this question.