ABSTRACT
Under the title of “Mneme,” I have discussed a special section of the physiology of stimulation for which, as a distinctive rubric, “Mnemic Excitations” may also serve. In that work not mnemic excitations alone, but also the original excitations which in a certain sense may be described as their indirect cause, were investigated by me on the standpoint of the reactions through which we become acquainted with them. These reactions are on the one hand subjective (so-called), that is they are sensations which we receive directly and observe introspectively as, for instance, definite sensations of sound, colour, or pain from which we infer a condition of excitation in some particular part of our irritable substance; on the other hand they are objective (again so-called), the effect, that is, of indirect perceptions, arising, of course, ultimately from sensations, by which we become aware of excitations in particular portions of our own or of other organisms. These objective reactions may be expressed in motor or plastic vital manifestations as well as in metabolic phenomena.
