On the question of fractional activity (“all or none" phenomenon) in mammalian reflex phenomena

At the present moment the question whether or not there is a state of “all or nothing” activity in reflex arcs seems to be raised, and it is one of importance to the future of investigation of the functions of the nervous system. Of the two views which may be held regarding the manner of the activity of reflex arcs one is that in which it is supposed that the efferent neurone may react with different degrees of intensity in different reflex activities, and that the afferent neurones may play with different degrees of intensity upon efferent neurones or upon interposed neurones.