Mood, behavior and memory.

The complexity has been viewed as an obstacle to medical research which, by necessity, depends on reduction. As a consequence, medical science often uses logical reductions in the attempt to understand the various facets of different clinical syndromes.However, such a reduction is not always possible in psychogeriatric syndromes where the clinical and biological complexity is the rule rather than the exception, and to identify correlation of signs and symptoms to a specific disease is often a difficult task. The present paper describes the complex relationships and interactions between the mood, behavior and memory. It is also suggested that the comprehension of psychogeriatric syndromes should not be based only on a separate analysis of these 3 elements (i.e., mood, behavior and memory), but on a multidimensional assessment of their reciprocal and dynamic interactions which may concur in the determination of the outcomes.