Evolutionary changes in the human brain may have led to bipolar disorder and schizophrenia

The same aspects of relatively recent evolutionary changes that make us prone to bad backs and impacted third molars may have generated long, noncoding stretches of DNA that predispose individuals to schizophrenia, bipolar disorder, and other neuropsychiatric diseases. A study identifies an unusually lengthy array of tandem repeats found only within the human version of a gene governing calcium transport in the brain.