Having a nap in the afternoon can help you overcome tricky problems, new research suggests.
A study found that Rapid Eye Movement (REM) sleep, when most dreaming occurs, can enhance creative problem-solving by up to 40 per cent.
REM sleep is characterised by darting eye movements. The body is temporarily paralysed and does not respond to sensory inputs. It begins about an hour after you nod off and occurs up to five times a night.
Participants in the study were better able to solve word association games after they had a refreshing siesta.