First electrophysical recording of sleep in a wild animal

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Three-toed sloth. Credit: Marcos Guerra STRI
Three-toed sloth. Credit: Marcos Guerra, STRI

In the first experiment to record the electrophysiology of sleep in a wild animal, three-toed sloths carrying miniature electroencephalogram recorders slept 9.63 hours per day—6 hours less than captive sloths did, reports an international team of researchers working on the Smithsonian Tropical Research Institute’s Barro Colorado Island in Panama.


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