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Causes of Bipolar Disorder
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Scientists are learning about the possible causes of Bipolar Disorder through several kinds of studies. While it is not yet known exactly what causes Bipolar Disorder, we do know that it appears to have primarily biological underpinnings.
Most scientists now agree that there is no single cause for Bipolar Disorder there are a number of factors that are believed to play a role, including genetics, brain chemicals and environmental factors.
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Genetics
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Bipolar Disorder is frequently inherited, with genetic factors accounting for approximately 80% of the cause of the condition. If one parent has Bipolar Disorder, there is a 10 per cent chance that his or her child will develop the illness. If both parents have Bipolar Disorder the likelihood of their child developing the illness rises to 40 per cent. However, just because one family member has the illness, it is not necessarily the case that other family members will also develop the illness. Other factors also come into play.
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Brain chemicals
A recent theory about the cause of Bipolar Disorder is that it is related to abnormal serotonin chemistry in the brain. Serotonin is one of the neurotransmitters in the brain, and one that strongly affects a person's mood. It is thought that the abnormal serotonin chemistry causes mood swings because of its feedback effect on other brain chemicals. It is unlikely, however, that serotonin is the only neurotransmitter involved.
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Environmental
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While the onset of Bipolar Disorder may be linked to a stressful life event, it is unlikely that stress itself is a cause of Bipolar Disorder. Notwithstanding this, people who suffer from Bipolar Disorder often find it beneficial to find ways of managing and reducing stress in their lives.
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For more details on understanding the signs and symptoms of Bipolar Disorder please go to Black Dog Institute
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