Links between creativity and mental health have been extensively discussed and studied by psychologists and other researchers for centuries. Parallels can be drawn to connect creativity to major mental disorders including bipolar disorder, schizophrenia, major depressive disorder, anxiety disorder, OCD and ADHD. For example, studies have demonstrated correlations between creative occupations and people living with mental illness. There are cases that support the idea that mental illness can aid in creativity, but it is also generally agreed that mental illness does not have to be present for creativity to exist. History It has been proposed that there is a link between creativity and mental illness. Major depressive disorder appears among playwrights, novelists, biographers, and artists at a higher rate than the general population. Association between mental illness and creativity first appeared in academic literature in the 1970s, but speculation about a link between "madness" and "genius" dates back at least to the time of Aristotle. The word "genius" may refer to literary genius, creative genius, scholarly genius, "all around" genius, etc. The Ancient Greeks believed that creativity came from the gods, in particular the Muses (the mythical personifications of the arts and sciences, the nine daughters of Zeus). In the Aristotelian tradition, genius was viewed from a physiological standpoint, and it was believed that the same human quality was perhaps responsible for both extraordinary achievement and melancholy. Romantic writers had similar ideals, with Lord Byron having pleasantly expressed, "We of the craft are all crazy. Some are affected by gaiety, others by melancholy, but all are more or less touched". Individuals with mental illness are said to display a capacity to see the world in a novel and original way; literally, to see things that others cannot. However, people do not require a mental illness to do so. Studies For many years, the creative arts, from visual arts and writing to music and drama, have been used in therapy for those recovering from mental illness or addiction. Another study found that increased levels of creativity were more common amongst those with schizotypal personality disorder than in either people with schizophrenia or people without mental health diagnoses. While divergent thinking was associated with bilateral activation of the prefrontal cortex, schizotypal individuals were found to have much greater activation of their right prefrontal cortex. This study hypothesized that such individuals are better at accessing both hemispheres, allowing them to make novel associations