The brain has a remarkable, virtually limitless capacity to astonish us with its mysteries

DURATION: 43:27
DISTRIBUTOR: ITV Global
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One tiny bit of damage to the brain can turn our world upside down. One small area malfunctioning can have bizarre and unpredictable consequences. This episode explores three remarkable conditions that have left their victims battling to retain their sense of identity – including a Staffordshire woman whose stroke left her with a foreign accent, a perfectly sane man with a compelling desire to amputate his own leg, and a woman whose left arm has taken on a mind of its own.