New research shows that movement problems in multiple sclerosis may stem from brain cells running out of energy. Damage to their internal power sources appears to drive the gradual loss of coordination and balance. Credit: Shutterstock Multiple sclerosis (MS) affects about 2.3 million people worldwide. In roughly 80% of cases, the disease involves inflammation in the cerebellum, a region of the brain essential for balance and coordinated movement. Damage in this area can trigger tremors,