When the comedian Markus Birdman woke up that did not look well, he first thought he had a hangover. But it had a minor stroke, at the age of 40.
His experience became the basis of the regular stand-up celebration of Edinburgh and now he works in increasing awareness about the effects of strokes.
Recent research by the Stroke Association indicates that a quarter of British people do not know that strokes occur in the brain. Four out of five surviving strokes that tested what people said around them did not understand the effect of one.
Video Journalist: Alex Stanger