Genetic Traits Link to Bipolar Disorder

Two genes in the brain that control the activity of the nerve cells may play a big role in a person's risk for developing bipolar disorder, which is marked by dramatic swings from being depressed to manic behavior and affects between one and three percent of the population worldwide. While identifying these genes is important, it is not expected that it will lead to a genetic test for the risk of bipolar disorder. It could, however, help unravel the mystery of how it arises and could lead to better treatments

A team of international scientists examined the genomes of approximately 10,956 people that were mainly from the United States and Britain. This was including 4,387 people with the disorder, also often known as manic-depression.