There are those that operate within the space of the body, and by studying perception, sensorial mechanisms, neuro motor diagrams, and the articulation common to things and to the organism function as a sort of transcendental aesthetic; these led to the discovery that knowledge has anatomo physiological conditions, that it is formed gradually within the structures of the body, that it may have a privileged place within it, but that its forms cannot be dissociated from its peculiar functioning; in short, that there is a nature of human knowledge that determines its forms and that can at the same time be made manifest to it in its own empirical contents.