But what makes their originality is that unlike the notions to be found in nosography, they are immediately linked to a practice, or rather from the moment of their formulation they are infused with therapeutic themes, for they are constituted and organised by images that are from the outset common to patients and to practitioners: the vapours that rose up from the hypochondrium, the stretched nerve tissue, 'worn and frayed', or impregnated with damp, the burning ardour that dries out organs.