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Involving, as this subject does, a comprehensive knowledge of the brain, nervous system and body, their relations and inter-relations, connections and nice dependencies, an overestimate of it is impossible. Though its importance has been recognized for centuries in all the great philosophic treatises of the Aryan peoples, the ideas presented in them have been so entirely spiritual and ethical as in no way to suggest the existence of the psycho-physical law underlying the whole.
The first to clearly perceive and appreciate the existence and potentiality of a psycho-physical law underlying the phenomena arising from the influence of the mind upon the body were Unzer and John Hunter. Since their time, the subject has been ably studied by such men as Muller, Elliotson, Laycock, Braid, Carpenter, Tuke and Haidenhain, who have assiduously devoted their lives to the scientific elucidadation of this problem upon purely psycho-physiologic principles. Such is the fruit of
HUNT R. INFLUENCE OF THE MIND UPON THE BODY AND ITS RELATION TO EDUCATION.. JAMA. 1898;XXXI(25):1464–1466. doi:10.1001/jama.1898.92450250022001h