This document provides an overview of the philosophical foundations and contributions of philosophy to the field of psychiatry. It discusses several key areas of philosophy including epistemology, logic, metaphysics, ethics, aesthetics, and specialized branches. It explores philosophical movements like phenomenology, existentialism, and their incorporation into psychiatry. Figures like Piaget, Jaspers, Frankl, Laing, and perspectives like the medical model are summarized in relation to their philosophical underpinnings and influence on psychiatry. The document aims to illustrate how philosophy has historically informed and continues to shape the theoretical bases of psychiatry.