Neuroscientists at UCLA have shown that lithium, long the standard treatment for bipolar disorder, increases the amount of gray matter in the brains of patients with the illness.
"When the researchers compared the brains of bipolar patients on lithium with those of people without the disorder and those of bipolar patients not on lithium, they found that the volume of gray matter in the brains of those on lithium was as much as 15 percent higher in areas that are critical for attention and controlling emotions."
Bipolar medication debates continue. 2003 UCLA study says antidepressants help. 2007 NIMH study says no.