The term 'PSYCHES, PART OF' refers to two of the three components of Sigmund Freud's psychoanalytic theory. The first component is the EGO, which is the conscious part of the psyche that mediates between the demands of the ID and the constraints of the SUPEREGO. The second component is the ID, which is the unconscious part of the psyche that contains the primitive drives and instincts. Together, these three components form the basis of Freud's psychoanalytic theory.