Americans of all races toss and turn in bed each night, and sleeplessness is affecting their jobs, social lives and even their sexual habits, the latest poll on U.S. sleep habits finds. “Everybody is sleeping less; we do live in a nation of sleepy people,” said Dr. Jose Loredo, a professor...

Although acupuncture has long been used to treat pain, the underlying cellular and molecular mechanisms are not fully understood. The process appears to involve the brain’s ability to produce opioids (pain-reducing chemicals) that bind to neurons in distinct regions of the brain, and the ability...