LE PSYCHISME ET LES STRUCTURES ANATOMIQUES

Abstract

Summary In this synthetic exposition, devoted to the relations which exist between psľchic functions and anatomic structures, Dr Pontes first insists on the difficulties of the subject and of its scientific analysis. Soma, Psyche, and social Milieu form a kind of continuum which is artificiallľ dissociated by our one-sided approaches. Experimentation cannot be fullľ practised on man, nor can its results on animal be extended to man without serious risks of error. Similar limitations appear if, resorting to the pathological method, we try to apply to the normal conclusions arrived at through the Study of the abnormal. Special reference is made here to psychosurgery, a topic quite familiar to Dr Fontes, who is Dr Egas Moniz’ countryman. The author then summarises our present knowledge concerning the structure, connections and functions of encephalic centers, especially; the thalamus, the hypothalamus and the frontal lobes. Finally, he subscribes, though not without serious reservations, to the hierarchical conception of the Nervous Sľstem as well as of the human mind, first suggested by Jouffroy, after him developed by Baillarger, Janet, Wallon in France, by Hughlings Jackson in Great Britain, and recentlľ revived in Europe (in its Jacksonian formulation) by von Mona-kow and Mourgue, Eľ, and Delaľ. This view enables one to consider nervous or psľchic illnesses as various dissolutions, resulting on the one hand from the suppression of higher centers or powers, on the other hand from the liberation of lower ones. It agrees rather well with the informations gathered by the anatomy and the physiology of the nervous sľstem, and with the conclusions suggested by psychosurgical operations. To the thalamus and hypothalamus correspond the lower and older manifestations of mind: emotion and instinct, to the cortex the higher and more recent adaptive and intellectual processes. The hypothalamus plays a most important role in the nervous machinery as a regulator of vegetative and instinctive life, of wake and sleep, of consciousness, and of the basic biological rhythms. At the cortical level the frontal lobe appears as the structural basis for such psychical functions as Ego-control, Will, Personality, and successfull action on the milieu.