Sleepy brains neglect half the world
A new study shows that drowsiness alters awareness in much the same way
as a common form of brain damage
The upside of insomnia: how sleep deprivation aids creativity
Musicians often find sleeplessness inspiring as well as tormenting. Dorian Lynskey explains how Matt Berry wrote his new album during nocturnal sessions, and why Dave Bayley of Glass Animals owes his career to insomnia
Log off before you nod off: why a good sleep is vital for a long life
Richard Wiseman: Blue light from computer devices is behind a sleeplessness epidemic linked to diabetes, heart disease – and an early death
Catch up on the sleep problems that could be keeping you awake at night
From night terrors to sleep sex, there are a host of conditions that could be having an impact on your health. By Imogen Beecroft
Lucid dreaming can be induced by electric scalp stimulation, study finds
Scientists discover that use of electric currents can influence sleepers' brains, potentially allowing them to control their dreams
What happens to your body if you study all night?
Students regularly 'pull all-nighters'. But beware: sleep deprivation can do serious damage
Haircut, weight, clothes, personal appearance … your boss is watching you
Research among 1,000 British executives also reveals that when they get home many turn the spotlight on themselves
Are you an insomniac? Share your experiences
If you know what it's like to be awake in the middle of the night, unable to get back to sleep, we'd like to hear from you. Share your insomnia tips, photos or experiences via GuardianWitness
Insomnia and me: Sloane Crosley
'When morning comes, I will be asked to run the same workday race as the rest of the world but with my shoelaces tied together'
Insomnia and me: Kenneth Calhoun
'She would push up against my side and wait for sleep to radiate off me in soothing vibes'