fMRI reveals a lack of sleep increases sensitivity to pain

Senior author Matthew Walker, with the University of California, Berkeley, and colleagues placed a pad on the legs of 25 healthy, well-rested adults until the temperature was unbearable, according to a Berkeley News release. On average, that topped out at 111 degrees Fahrenheit. But, after enduring a sleep-deprived night that average dropped to nearly 107 degrees. After reviewing fMRI data, Walker and colleagues observed a decrease in activity in the nucleus accumbens and insular cortex, r...

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