LAUSR

Drawing on Latin treatises, letters, and autobiographical writings, this article outlines the changes in the—thoroughly somatic—learned medical understanding of the emotions (or “affectus/passiones animi”) between 1500 and 1800 and their impact on lay experience. The mixture of the four natural humors explained individuals’ different propensity to certain emotions. The emotions as such, however, were described primarily as movements of the spirits and the blood towards or away from external objects. The term “e(s)motion” emerged. The final part highlights the 18th-century shift from spirits and blood to the nerves as the principal site of the emotions. Physicians and laypersons alike now associated the emotions closely with the peculiar nervous sensibility and irritability of individuals and groups.