In the terrain of the memory, physiological research has made important progress but experimentations have not yet been completely correlated (year 1975). For this reason, a satisfactory overview has yet to be provided to accompany the psychological explanations. The results obtained with electroencephalography;the application of electrodes to the brain; the observations of the hippocampus and reflexology work deserve to be pointed out because of their significance. However, the nature of stable reminiscence itself is as yet unrevealed. The advances in the field of genetics are more important. With the discovery of DNA’s participation in genetic memory, research is being carried out at present on certain basic aminoacids that intervene in this phenomenon. In general terms, and in the present state of the research, we can establish a classification of memory as: (1) genetic or inherited (by the transmission of traits from the same species, from progenitors to descendants), and (2) individual or acquired memory. In the first type of memory, aside from maintaining individuals within the same species, the genetic code regulates the organic changes in the individuals’ different vital stages. Acquired memory, on the other hand, develops in different layers of depth according to the passage of time, from the oldest to another that is recent, and the immediate memory. Not much more can be added, except that it does not have a precise cerebral localization.
Working Range: The recording range is identical to that of the senses (upon a change, in sensory tone, the recording of information takes place), and to that of the activity of the consciousness at its different levels. It is accepted that everything that arrives to consciousness or that is produced by it is memorized, even if not everything is evocable. Theoretically, the only time when there would be no recording is in passive deep sleep (without images), with a minimum of cenesthesia.
Nervous Localizations: It is accepted that there seems to be no precise localization, but rather one that is diffused throughout the nervous system, in which reference is made to “low and high” levels of mnemic track locations. The first is understood as referring to themedulla and limbic system; the second to the cortex in its areas of association—frontal, temporal and pario-occipital.The stimulation of temporal areas allows us to infer that memories are not stored there; rather that in this lobe, “keys” function for the liberation of memories located anywhere in the nervous system, normally working on the basis of similarity between recollection and sensory impulse or current of thought. On the other hand, the areas of language, vision and writing seem to effect a specific recording, together with specific work. It seems that the vital importance of the cortex for the memory and the importance of the hippocampus for “recording” have been experimentally proven.It is known that in the event of damage to one hemisphere (imprints of which are left), the other proceeds to regenerate memory, though not completely. It is therefore assumed that memory is diffuse and is spread throughout the cerebrum and brain stem.