Manic-depressive psychosis

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Affective psychoses
Bipolar disorder
Circular psychosis
Periodic insanity
Manic depression
Manic-depressive psychosis is a severe disturbance of affect (feeling or emotion) characterized by extreme and pathological elation such as extreme excitability, volubility and foolhardiness, sometimes leading to physical exhaustion, alternating with severe dejection or depression; both of which may last for months or years. There may be normal intervals between these states, and cases are known in which only the manic or the depressive attack occurs once or repeatedly. Attacks usually alternate with intervals of complete health.

Due to the unpredictable nature of manic-depressives, it is impossible to rely on them for responsible action and judgement. While they may be very alert and mentally capable during their manic phase, they can experience extreme feelings of guilt and unworthiness and even lean toward suicidal tendencies in their depressive modes. As manic-depressive psychosis is not immediately recognizable, unknowing persons may get involved in the patient's manic schemes, only to be disappointed when the intended outcomes never materialize.

Manic depression has often been linked to great creativity. Lord Byron, Percy Bysshe Shelley, Herman Melville, Robert Schumann, Virginia Woolf, Samuel Taylor Coleridge, Robert Lowell and Theodore Roethke are a few of the many artists said to have suffered from mood disorders.
The condition is relatively common. Some 20 to 25% of all admissions to psychiatric hospitals consist of manic-depressive patients. Frequently the diagnoses of patients with manic-depressive psychoses are changed to schizophrenia after there have been several attacks of disturbed behaviour. Those who suffer extreme forms of manic depressive illness are likely to report psychic experiences and enhanced creativity levels prior to or during illness episodes. A 1993 study found that at least 1 in 100 individual (2.5 million Americans) suffer from manic depression.
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