Measuring how well children with attention deficit hyperactivity disorder (ADHD) can control their hand movements could help to gauge the severity of their disorder, a new study suggests. Children ...

Rare disorder makes one side of the body mirror the other. Apr. 29, 2010— -- Andree Marion's right hand not only knows what the left one is doing, it is forever mimicking its actions. When Marion ...

A new class of brain cells -- mirror neurons -- are active both when people perform an action and when they watch it being performed. Some scientists speculate that a mirror system in people forms the ...