ABSTRACT
We may usefully preface our investigations by briefly recapitulating some results to which we had already arrived in Mneme. In it 1 excitation was defined as “energetic action on the organism such as results in sequences of complex changes in the irritable substance of that organism. To this alteration in the organism, an alteration which lasts as long as the stimulation producing it, we gave the name of synchronous phase 01 excitation. What the essential nature of such a state of stimulation may be we do not know. All that we do know are a few of the accompanying factors of the process and some of the manifestations of the vast number of changes characterizing this condition of excitation. And we are accustomed to consider as reactions of the organism to the stimulation every manifestation connected with the excitation, whether those manifestations be directly or indirectly connected with that excitation.
