A clot in the blood vessels in the brain cuts off the supply of oxygen and nutrients to brain cells,...

During a stroke, part of the brain gets cut off from its supply of blood. Without that oxygen and nutrients,...

A stroke occurs when a blood vessel in the brain ruptures or a blockage stops the flow of blood, causing...

Every movement we make — from blinking to walking — requires a complex interaction between the central nervous system (brain...

There is no one test for Parkinson's, so it can take a while to diagnose the condition. Doctors can usually...