Issues in Reading, Writing and Speaking

A Neuropsychological Perspective
" ['etat pathologique ne differe point radicalement de ['etat physiologique, a ['egard duquel if ne suarait constituer, sous un aspect quelconque, qu'un simple prolongement plus ou moins etendu des limites de variation, soit superieures, soit in/erieures, propres a chaque phenomene de ['organisme normal, sans pouvoir jamais produire de phenomenes vraiment nouveaux, qui n'auraient point, a un certain degre, leurs analogues purement physiologiques. Par une suite necessaire de ce principe, la notion exacte et rationnelle de ['etat physiologique doit donc /ournir, sans doute, l'indespensable point de depart de toute saine theorie pathologique,* mais if en resulte, d'une maniere non moins evidente, que, reciproquement, ['exam en scienti/ique des phenomenes pathologiques est eminemment propre a per/ectionner les etudes uniquement relatives a ['etat normal. Un tel mode d'experimentation, quoique indirect. est, en general, mieux adapte qu'aucun autre a la vraie nature des phenomenes biologiques. " (Comte, 1838; pg 696). The principle that an unde. rstanding of physiology can be based on the analysis of pathological states, and that, vice versa, an understanding of pathology cannot proceed without a clear formulation of the structure on normal physiological states formed the basis for the development of experimental medicine in France in the first half of the 19th century, and for the development of neuropsychology in the second half of the 19th century.

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