With no more than a few intensive exceptions, all of Gurdjieff’s references to centers are principally anecdotal. That is, in them, centers are mentioned only in the context of explaining some other idea.
The discussion of centers and the related idea of recording attention fills no more than perhaps two dozen pages of Gurdjieff’s lectures as given in Ouspensky’s In Search of the Miraculous.
Fourth Way literature offers an enticing, yet incomplete discussion of the characteristics of the centers. Although it proposes a model with (at our degree of resolution) fifteen components, it describes far fewer. As preparation for recording attention, all centers must be defined and described. This paper offers much of that more complete description.
This paper relies heavily on material presented in Brain Systems.