A decade ago, at age 55, Don Lewis suffered a stroke in his sleep. When he woke up, he couldn't move his left arm or leg.

A new, inexpensive urine test that measures two sugar alcohols, sorbitol and xylitol, is making it easier, faster, and far ...

Exposure to light during sleep is associated with an increased risk of cardiovascular disease, according to a new study.

Scientists at EPFL have developed an innovative, non-invasive brain stimulation therapy to significantly improve visual ...