During sleep paralysis, however, "we regain consciousness before the muscles regain their freedom from REM-induced paralysis," said Walker, who is also a professor of neuroscience and psychology ...

During sleep paralysis, however, "we regain consciousness before the muscles regain their freedom from REM-induced paralysis," said Walker, who is also a professor of neuroscience and psychology ...

During sleep paralysis, however, "we regain consciousness before the muscles regain their freedom from REM-induced paralysis," said Walker, who is also a professor of neuroscience and psychology ...

KEY TAKEAWAYS Sleep paralysis, experienced by 30% globally, involves hallucinations during REM sleep. Baland Jalal, a Harvard researcher, studies its causes and terrifying experiences.

Following deep sleep, REM sleep is the next critical phase of sleep cycles, characterized by more dreaming that's also extra vivid and lifelike, and by faster heart rate and breathing. It's essential ...