Sleep Spiral (IMAGE)

University of California - Santa Cruz

Sleep Spiral

Caption

When elephant seals go into rapid-eye-movement (REM) sleep during deep dives, sleep paralysis causes them to turn upside down and drift downwards in a “sleep spiral.” This data-driven graphic shows sleeping postures every 20 seconds, with accompanying 30-second segments of EEG traces in the background.

Credit

Graphic by Jessica Kendall-Bar

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For use only with news coverage of this research

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