Mania is a medical condition characterised by severely elevated mood. Mania is most usually associated with bipolar disorder, where episodes of mania may cyclically alternate with episodes of depression. (Note: not all mania can be classified as bipolar disorder, as mania may result from other diseases or causes. However, bipolar disorder is the "classic" manic disease). Hypomania is a less severe variant of mania, where there is less loss of control. Mania can be experienced at the same time as depression, in a mixed state. Dysphoric mania is primarily manic and a depressive mixed state is primarily depressed. This has caused speculation amongst doctors that mania and depression are two independent axes in a bipolar spectrum, rather than opposites. This book presents the latest research in this field.