A recent study from the Medical University of South Carolina, published in iScience, reveals that the middle meningeal artery doesn’t just supply blood to the brain—it might also play a role in keeping it clean. By using enhanced magnetic resonance imaging and high-resolution spatial mapping on five heathy adults, the researchers discovered a previously unknown, slow and steady outflow of brain fluids into the lymphatic system, which is responsible for waste removal. The findings align with similar results from studies on rodents.

This study helps scientists gain a deeper understanding of how a healthy human brain functions normally. The next step is to compare these results to those of individuals with brain disorders to see if a malfunctioning drainage system and waste accumulation could be damaging to brain cells and contributing to memory loss, Alzheimer’s disease and brain injuries.