- A dictionary of medical eponyms

Claude Bernard's syndrome

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This syndrome, which is the converse of Horner's syndrome, consists of ipsilateral pupillary dilatation, eyelid lag, diminished blinking, and increased lacrimation. In some instances there are also symptoms of vasoconstriction, decreased local temperature, and increased sweating on the ipsilateral side of the face. Claude Bernard first described this phenomenon in 1852.


  • C. Bernard:
    Recherches expérimentales sur le grand sympathique et spécialement sur l'influence que le section de ce nerf exerce sur la chaleur animal.
    Comptes rendus de la Société de biologie, Paris, 1853, 5: 77.

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