Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/what-happens-during-a-stroke-vaibhav-goswami Every two seconds, someone in the world...
========== Every two seconds, someone somewhere
in the world experiences a stroke. And one out of every six people will have
one at some point in their lives. Strokes deprive brain cells of oxygen and are one of the most
common causes of death and a leading cause
of preventable disability. When someone experiences a stroke,
quick medical care is critical, and can often help avoid
permanent brain damage. But what causes strokes
in the first place? And what can doctors do to treat them? The brain makes up just 2%
of your body’s mass but consumes more than 20%
of the oxygen in your blood. That oxygen is carried to the brain
through a system of arteries. Carotid arteries supply
the front of the brain, and vertebral arteries supply the back. These are connected...