New research suggests that jumping spiders show signs of sleep cycles, similar to humans and some animals.
This photo provided by Daniela C. Roessler in August 2022 shows a jumping spider exhibiting leg curling during a REM sleep-like state. A study published on Monday, Aug. 8, 2022, suggests that jumping spiders show signs of sleep cycles, similar to humans and some animals. It's a question that keeps some scientists awake at night: Do spiders sleep?
The researchers described this pattern as a “REM sleep-like state.” In humans, REM, or rapid eye movement, is an active phase of sleep when parts of the brain light up with activity and is closely linked with dreaming. Many species similar to spiders actually don’t have movable eyes, which makes it hard to compare their sleep cycles, explained study co-author Paul Shamble, an evolutionary biologist at Harvard University.
Critters like the jumping spider are very far from humans on the evolutionary tree. Jerry Siegel, a sleep researcher who was not involved with the study, said he's doubtful that the spiders can really experience REM sleep.
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