“…This term, present in the Chronicle of Asti , means first a physical movement and second, an interior and emotional one. Between the 11th and 13th centuries, it is more and more frequently used to refer to a civil unrest troubling the social order (Fossier, 1973; Nagy, in press), just like a perturbation was a feeling troubling the peaceful mind. The use of this word is all the more interesting in this context, where the movement was under control, authorized and encouraged by Church and lay authorities.…”