Sensoriality during a session brings back echoes of sensoriality from another time. But is it not also through affect and the representations of movement that it conveys? The reconstruction of traumas from a past that has left no memory begins with the basic figuration of a rhythm, a gesture and an act, before a fragment of memory charged with affect can take shape. Its form emerges from the hallucinatory activity of the session, whose power of figuration opens the way to symbolization.