Trying to formulate the concept of mind, the Philosophy of the Mind has based itself on three fundamental notions: causation, identity and supervenience. The belief in the dichotomy between physical aspects and inextense aspects of our experience remains a problem of considerable difficulty. The possibility of dialogue as much in a dualist as in a monist theory is hardened because each boarding demands for a principle, a relation or operation to solve the problem of linking body, mind and world. Subsequent notions, as intentionality, consciousness or qualia, will remain closed in its proper conceptual scopes. For this reason, to analyze as each fundamental notion is used assists in the understanding of restrictions and advances, allowing since the definition of appropriate methods of treatment to the problems of each domain to the theories that will suit better to its possible resolutions.