Researchers have conclusively identified the genetic cause of a rare, progressive movement disorder. A rare extra-long version of a gene appears to cause nerve cells to become poisoned by toxic ...

Tourette syndrome campaigner John Davidson has explained he left the British Film and Television Awards (BAFTAs) ceremony early on Monday night, aware his outbursts were causing distress. Davidson was ...

Dysdiadochokinesia is the inability to perform quick, alternating movements, such as opening and closing a fist or tapping a foot. It is usually a symptom of an underlying health condition that ...