Supernatural beliefs of demons and witches during the 14th century
John Grey believed insanity is caused by physical. Mentally ill patients should be treated as physically ill. He emphasized on rest, diet, and proper room temperature and ventilation
Benjamin Franklin noted that a mild and modest electric shock to the head produced a brief convulsion and memory loss (amnesia)
Psychoanalysis and Hypnosis under Franz Mesmer, Freud, Klein, and many others
Humanistic approach based on Roger’s theory, Maslow’s theory of needs and many more
Behaviorism proponents such as Skinner, Watson, Pavlov and many others