The psychoanalytic theory of depression. Part II--The major themes.

In this second part of a review of the psychoanalytic theory of depression the major themes of the theory, as they appear in the works of the major contributors, are discussed. It is difficult to approach the complexities and ambiguities of psychoanalytic theory in general, and the theory of depression in particular, without an historical perspective. Accordingly, the author decided to group the major themes of the theory under three headings: Instinct Theory, Structural Theory, Object Relations Theory. The themes included under Instinct Theory are constitutional factors, aggression and orality. Under the heading of Structural Theory those themes associated with the ego, with the concepts of narcissism and the self, and finally those associated with the superego are discussed. It is of note that under narcissism the work of both Kohut and Kernberg is considered, including its relevance to any investigation of depression. The concepts of object loss and object failure are discussed under the heading of Object Relations Theory. It is suggested that a psychoanalytic approach has much to offer both the clinician and the researcher in their attempts to develop a comprehensive theory to explain the protean manifestations of human depression.