None are diagnostic of the disorder, but PET scan and FMRI scan can show differences in metabolism. These differences can sometimes identify different moods.
Bipolar disorder
Bipolar disorder has a genetic component - it does seem to run in families, and if you have people in your family who have bipolar disorder, you have a higher chance to have it yourself. However, there is more than just genetics causing it - scientists haven't figured out the whole think, but they know it is more than just a gene or group of genes. Some people can grow up in the same family and have the same genes, but not develop bipolar disorder.
Bipolar disorder is generally caused by genetics.
The correct term is bipolar disorder. Some people call it a disease though.
a disorder
http://blogs.psychcentral.com/bipolar/2009/01/bipolar-disorder-qa-how-close-are-we-to-a-bipolar-cure/
Yes, stress makes Bipolar Disorder behavior worse. My daughter is Bipolar.
It's not known to be an effective treatment for bipolar disorder.
Bipolar Disorder, not otherwise specified. It means a form of Bipolar Disorder that doesn't really fit the other diagnostic categories.
They may be used in conjunction with mood stabilizing medication, which are used for bipolar disorder, but they are not used alone as a solution to bipolar disorder.
Manic depression, or manic depressive disorder is nowadays more commonly known as Bipolar disorder or Bipolar affective disorder. It can also be referred to as Hypomania due to public unawareness.
Bipolar disorder