How does meditation work?

Meditators have been talking about altered states of mind for centuries. More recently, doctors and scientists have been joining the conversation with their brain scans of meditators in hand. They aren’t out to debunk it. They’re trying to prove the benefits with hard science so meditation can become an approved therapy. One of those benefits: People who meditate often have more, denser gray matter — the part of your brain packed with neurons. Let’s take a closer look at what those neurons are doing — in the form of brainwaves.