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Science has long believed that in the human brain, dreams largely occurred during the rapid eye-movement (REM) phase of sleep, but scientists studying dreams recently have learned that different types of dreams occur in different parts of the brain, and at different times in the sleep cycle.
Specifically, they learned that “dreaming about faces was linked to increased high-frequency activity in the region of the brain involved in face recognition, with dreams involving spatial perception, movement and thinking similarly linked to regions of the brain that handle such tasks when awake.”
By using EEG recording on a sleeping patient, these scientists have opened up many new avenues of study. You can read their paper here, or the summary of their paper here.
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