NASHVILLE, Tenn. (AP) -- A doctor at Vanderbilt Children's Hospital in Nashville says he's not surprised by a new study that shows the number of children seeking treatment for concussions in emergency rooms has spiked over a 10-year period.

The study released by the Centers for Disease Control and Prevention said the number has gone up by 60 percent.

Alex Diamond told WTVF-TV that during the last decade parents and coaches have become more aware of the dangers of concussions.

He said common signs of a concussion are headaches, dizziness, a change in behavior, and balance problems.

Vanderbilt University operates a sports concussion center. It provides parents and coaches information about head injuries.

The center also has a 24-hour hotline parents can call to get answers about their child's head injury.

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