| 1. | He was describing the way a human brain sustains a concussion.
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| 2. | However, it turned out that he had a minor concussion.
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| 3. | That translates to more than 250, 000 concussions per year.
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| 4. | The concussion kept him out of the second half against Carolina.
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| 5. | Injury update : Quarterback Ryan Fien ( concussion ) practiced Tuesday.
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| 6. | Offensive guard Matt Soenksen ( concussion ) is expected to play.
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| 7. | Woozy from repeated concussions, wide receiver Al Toon suddenly retired.
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| 8. | The fact that he gets these concussions worries us, though.
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| 9. | Other than concussions, he's been a healthy player.
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| 10. | 49ers offensive tackle Steve Wallace endured three concussions in two years.
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