John Green asks the questions you submitted, and Dr. Aaron Carroll answers them. Also, great job with the questions. They were really good.

Howcast - A blow to the noggin may not seem like a big deal when it happens. But, left untreated, some can be deadly serious. And repeated head knocks can have dire health consequences years later. Here's how to prevent head injury and...

Howcast - Learn how to recognize and treat a concussion in this first aid video from Howcast with Nurse Mary.

Howcast - Learn how to treat a head injury in this first aid video from Howcast with Nurse Mary.

Howcast - Learn how schizophrenia affects the brain from psychiatrist Jeanie Tse in this Howcast video.

Howcast -Invest a few minutes in learning how to protect your baby's head from injury and it will help you safeguard your child from potential lifelong health issues.

Conversion disorder is also called functional neurologic symptom disorder. This is where you have medically unexplained neurological symptoms. The symptoms are thought to have a psychological basis because not only are...

Are you a football fan? So was I. But a few years ago, I learned some things that totally changed my mind. Football fans everywhere are prepping for the Super Bowl - the Big Game - but I’ll be sitting on the sidelines for this one and I...

John Green asks the questions you submitted, and Dr. Aaron Carroll answers them. Also, great job with the questions. They were really good.

Horizontal level of the brain at the caudate nucleus level.