White blood cells have long been known to travel through the brain, but scientists have been unable to discern just how they do it - until now. Science Alert reports that neurophysiologist Daniel S. Reich, from the National Institute of Health, and his research team were able to confirm lymph networks serving the brain using MRI.
"For years we knew how fluid entered the brain. Now we may finally see that, like other organs in the body, brain fluid can drain out through the lymphatic system," says Reich.
The next step for researchers is to study variations in this drainage system to see if they can help explain deeper health conditions.
"These results could fundamentally change the way we think about how the brain and immune system inter-relate," said Walter J. Koroshetz, NINDS [National Institute of Neurological Disorders and Stroke] director.