As a new academic discipline, psychoneurobiology is based on the neurosciences. Its aim is to enable a fresh comprehension of psychological function and dysfunction towards a better adaptation of the therapeutic approach. The first in a series of three, this volume describes - starting with mnesic organization - the anatomy of a psyche where the "Ego" is just the part which is visible. This way, we are able to account for occurrences such as semantics and hallucination. This cornerstone work, always consistent with neuropsychology and biology, lays the foundations for a different understanding of psychological phenomena and their malfunction.