- Appears dazed or stunned
- Seems confused
- Forgets plays or instructions
- Is unsure about game, score, opponent
- Moves clumsily (altered coordination)
- Exhibits balance problems
- Shows changes in mood, behavior, or personality
- Responds slowly to questions
- Forgets events prior to hit or fall
- Forgets events after the hit or fall
- Loses consciousness (even briefly)