NECK COLLAR PREVENTS HEAD INJURIES (Orthopedics This Week)
"Go Beyond the Helmet"
The hazards to players of football and other contact sports, such as hockey, come not just from external blows to the head—partially mediated by a helmet—but from blows of less velocity that cause the brain to bounce back and forth within the skull. “Brain slosh” is what happens when the brain, which is loose in the skull, bounces around in response to a hit. A study conducted at Boston University suggests that the hundreds of minor hits experienced by players pose a greater long-term risk than do concussions.
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The Orthopedics Industry 
