Psychotherapy Services in South West London

Insomnia? Perhaps the Moon is to blame!

For centuries myths have swirled like clouds around the possibility that the full moon affects the human psyche. According to a new small study by researcher in Switzerland, one influence is real – at or near full moon, they found that people’s sleep is affected. Their participants slept for less time (20 minutes on average) around full moon; took five minutes longer than average to fall asleep; and they experienced a 30% decrease in deep sleep, as revealed by the brain’s electrical activity. Crucially these influences can’t be due to increased light because the data were collected in a sealed sleep laboratory. Christian Cajochen and his team think their result provide tentative evidence that humans have a circalunar rhythm reminiscent of other endogenous rhythms such as the circadian (daily) and circannual (seasonal) rhythms.

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