Medical innovation has taken a remarkable step in changing the landscape of stroke diagnosis within the confines of an ambulance. A team led by neurologist Jonathan Coutinho at Amsterdam UMC has invented a brain-wave cap that has demonstrated remarkable accuracy in diagnosing large ischemic strokes. These strokes are caused by a blood clot obstructing a cerebral blood vessel and can have devastating consequences. Timely diagnosis and treatment are essential to prevent permanent disability or death.