Anxieties stoke bipolar unrest

Insomnia and other sleep problems frequently afflict people with bipolar disorder, even when they’re taking medications that quell their extreme emotional highs and lows, a new study suggests. Fear and anxiety that sleep loss will trigger bouts of mania or depression—the cardinal features of bipolar disorder—wreak havoc on slumber among these individuals, say psychologist Allison G. Harvey of the University of California, Berkeley and her colleagues.