Concussions do not always cause loss of consciousness.  Here are some of the signs and symptoms of a concussion:

Coaches or Parents may notice:

• A dazed or stunned appearance
• Confusion about the play
• Clumsy movements
• Slow responses to questions
• Personality or behavior changes
• Retrograde amnesia (forgetting events prior to the hit)
• Anterograde amnesia (forgetting events after the hit)
• Loss of consciousness (even temporary)

Athletes may report:

• Headache
• Nausea
• Balance problems
• Double vision
• Sensitivity to light
• Sensitivity to noise
• Difficulty sleeping
• Cognitive changes
• Feeling foggy

For more information: http://www.cdc.gov/concussioninYouthSports/images/coaches_Engl.pdf