Free Republic

The brain works like a complex machine, sending electrical signals that allow us to perceive and understand the world around us. Now, scientists have discovered a new system in this brain that acts as a "garbage truck," removing waste that might affect the brain. The findings could have large implications for treating neurological disorders like Alzheimer's disease. The body defends the brain like a fortress, ringing it with a complex system of gateways that control which molecules can enter and exit. This "blood-brain barrier" was known to exist for quite some time, but it's only now that researchers are beginning...