Sigmund Freud, born Sigismund Schlomo Freud, was an Austrian psychiatrist who founded the psychoanalytic school of psychology. Freud is best known for his theories of the unconscious mind and the defense mechanism of repression and for creating the clinical practice of psychoanalysis for curing psychopathology through dialogue between a patient and a psychoanalyst. Freud is also renowned for his redefinition of sexual desire as the primary motivational energy of human life, as well as his therapeutic techniques, including the use of free association, his theory of transference in the therapeutic relationship, and the interpretation of dreams as sources of insight into unconscious desires. He was also an early neurological researcher into cerebral palsy. While of significant historical interest, many of Freud's ideas have fallen out of favor or have been modified by Neo-Freudians, although in the past ten years, advances in the field of neurology have shown evidence for many of his theories. Freud's methods and ideas remain important in clinical psychodynamic approaches. In academia his ideas continue to influence the humanities and some social sciences.