Tangradi was sidelined for two months, due to concussion symptoms.

Crosby experienced mild concussion symptoms and neck pain but remained in the game.

He has had the classic concussion symptoms: a headache, some dizziness, a foggy feeling.

Some athletes may deny concussion symptoms because they do not wish to be prevented from rejoining the game.

Every return-to-play guideline recommends that an athlete not return to competition until all concussion symptoms are absent during both rest and exercise.

The law mandates basic emergency and safety training for sports officials in high schools, including education about second-impact syndrome, with a special focus on concussion symptoms.

But he remains under orders not to work out until his concussion symptoms clear.

For nearly any other athlete, the reaction to a diagnosis of "mild concussion symptoms" could range anywhere from concerning to relieving, depending on the circumstances.

He then took the entire 2010-2011 season off after experiencing continued concussion symptoms.

Cumberland missed the entire 2011 season with concussion symptoms.