Jules Séglas

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Jules Séglas (May 31, 1856 - 1939) was a French psychiatrist who practiced medicine at the Bicêtre and Salpêtrière Hospitals in Paris. Early in his career he was an assistant to famed neurologist Jean-Martin Charcot (1825-1893). Séglas' ideas and theories influenced a number of psychiatrists, including Henri Ey (1900-1977) and Jacques Lacan (1901-1981). In 1908 he became president of the Societe Medico-Psychologique.

Séglas made important contributions in the field of psychopathology concerning delusions, hallucinations and "pseudohallucinations", including a detailed nosology of these phenomena. He did extensive research involving language and its relationship to mental illness. Here he described linguistic traits such as logorrhea, embolalia, near-mutism, automatic speech, alexia, agraphia, et al; and how these behaviors take shape and interact in various psychiatric disorders.

[edit] Selected writings

L’hallucination dans ses rapports avec la fonction du langage, Progrès médical, 1888.
Des Troubles du langage chez les Aliénés, Rueff Editeurs, Paris, 1892.
Leçons cliniques sur les maladies mentales et nerveuses (Salpêtrière (1887-94), Asselin et Houzeau, Paris, 1895
Le délire de négations, in Du délire des négations aux idées d'énormité, Jules Cotard & autres , L'Harmattan.