A structure within the ego itself that sabotages the growth of a healthy ego, functioning as a pathological organization that unconsciously sabotages and undermines the growth of healthy parts of the individual.

A function that is born with the child, based on the introjection of partial objects, the mother's breast, to which the baby attributes extreme powers of goodness and evil, protection and persecution, source of pleasure and pain.

A double of the subject, since through projective identifications of his superegoic internal objects onto someone, the subject constructs a duplication of himself, a kind of 'twin'.

A structure composed of internalized objects, to which a persecutory character is usually attributed, of greater or lesser intensity, and which, through commandments, opposes the impulses of the id, makes threats and sabotages the functions of the ego, distorts external reality and, at the same time, submits to it, fulfilling the determinations of what the subject should and should not do.