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Classification of Bones

The Psyche

Freud Personality Theory

Freud (1923) later developed a more structural model of the mind comprising the entities id, ego, and superego (what Freud called “the psychic apparatus”). These are not physical areas within the brain, but rather hypothetical conceptualizations of important mental functions.

The id, ego, and superego have most commonly been conceptualized as three essential parts of the human personality.

Freud assumed the id operated at an unconscious level according to the pleasure principle (gratification from satisfying basic instincts). The id comprises two kinds of biological instincts (or drives) which Freud called Eros and Thanatos.

Eros, or life instinct, helps the individual to survive; it directs life-sustaining activities such as respiration, eating, and sex (Freud, 1925). The energy created by the life instincts is known as libido.

In contrast, Thanatos or death instinct, is viewed as a set of destructive forces present in all human beings (Freud, 1920). When this energy is directed outward onto others, it is expressed as aggression and violence. Freud believed that Eros is stronger than Thanatos, thus enabling people to survive rather than self-destruct