Rapid eye movement during sleep triggers the parts of our brain involved in processing visual images while we are awake, a new study shows.
The finding, published today in Nature Communications, may help explain why we can remember vivid dreams when we are woken during this phase of sleep.
The relationship between dreaming and eye movement during sleep has been a long-standing unsolved question in sleep research, says co-author and neuroscientist Dr Yuval Nir.
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“Since they discovered REM sleep they knew that in that state of sleep people experience vivid dreams and move their eyes frantically with their eyelids closed but any attempt to relate these two phenomena has been very challenging,” said Nir, from Tel Aviv University.
Nir and colleagues’ study in patients undergoing treatment for severe epilepsy has revealed for the first time the electrical activity of our “mind’s eye.”