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Légende : Local brain connectivity 3 dimensional view of mean regional connectivity, averaged over 58 subjects. Bipolar disorder, also known as bipolar affective disorder, manic-depressive illness, or affective psychosis, is a mental illness characterized by periods of elevated mood and periods of depression. The elevated mood is significant and is known as mania or hypomania depending on the severity. During mania an individual feels or acts abnormally happy, energetic, or irritable. They often make poorly thought out decisions with little regard to the consequences. The need for sleep is usually reduced. During periods of depression there may be crying, poor eye contact with others, and a negative outlook on life. MRI (magnetic resonance imaging) is a diagnostic technique used to create images of the body like a CT. It is non-invasive (It does not enter the body cavity) and requires no radiation, instead it is based on the magnetic fields of the hydrogen atoms in the 3D Magnetic Resonance Imaging (3D MRI) body. By scanning the body, MRI is able to provide computer-generated images of the body's internal tissues and organs. MRI usually scans the body in an axial plane (ie. cutting the body into slices from front to back). Usually the images are 2 dimensional, where the MRI images are usually presented in slices from top to bottom. However, using sophisticated computer calculation, these 2 dimensional slices can be joined together to produce a 3 dimensional model of the area of interest being scanned. This is called 3D MRI. No date, location or sex was given.