Andrés Piquer-Arrufat (1711-1772): contributions of an eighteenth-century spanish physician to the concept of manic-depressive illness.

Largely unknown in Anglophonic medicine, eighteenth-century Spanish physician-scholar Andrés Piquer-Arrufat was early to coin a name (affectio melancholico-maníaca, or "melancholic-manic illness") for the syndrome that emerged much later as manic-depressive illness and then bipolar disorder. He considered it a single, independent diagnostic entity, distinct from mania and melancholia, with varying manifestations over time. Piquer recognized mixed states, seasonality, and rapid cycling, and hypothesized "mental or cerebral damage" as underlying the disorder. His formulations evolved from clinical observations of patients over time, including his detailed longitudinal clinical description of Spanish King Ferdinand VI (1759), and as presented in his own medical textbook (1764). Piquer anticipated the often cited nineteenth-century works of Jean Falret and Jules Baillarger in Paris, and later, Emil Kraepelin in Heidelberg, by more than a century.