Scientists discover type of dream that's an early sign of dementia

People who move around in bed and thrash about during sleep could be exhibiting an early sign of dementia or Parkinson's disease 'in nearly all cases', experts said today.

Research has long suggested those who suffer a condition known medically as REM sleep behavior disorder (RBD) — which sees people 'act out' dreams — had increased inflammation in an area of the brain where the chemica

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