Here's a look at some of the top health news being talked about around the U.S. and the world today:

• A way of checking whether a person has fully healed from a concussion is to compare his or her cognitive health post-concussion to a base line test taken well before an injury has ever occurred. Now, University of Maryland researchers are among those trying to use virtual versions of sports with the Nintendo Wii Fit as a way to gather those base lines for athletes, the Washington Post reported.

• Unhealthy behaviors may be to blame for recurrent headaches in teens. New research has found teenagers who "are overweight, get little exercise, or smoke" could be more likely to suffer from headaches, Reuters is reporting.

• New research has found a link between attention deficit hyperactivity disorder, or ADHD, and pesticide exposure in pregnant women, the Los Angeles Times reported.

Tina Reed covers health and the environment for AnnArbor.com. You can reach her at tinareed@annarbor.com, call her at 734-623-2535 or find her on Twitter @TreedinAA.