most frequent cause American Association of Neurological Surgeons Source of quotations 美国神经外科医师协会–与运动有关的头部创伤(英) football alone top 5 most offending sports 446,000 sports-related head injuries study played a role football alone American Association of Neurological Surgeons most frequent cause most frequent cause most frequent cause Sports Related – Head Injuries most frequent cause football alone not just kids being injured recent study Sports Related – Head Injuries 美国神经外科医师协会–与运动有关的头部创伤(英) most frequent cause safest sports most frequent cause most frequent cause most frequent cause sports-related head injury Head Injury: Sports top 5 most offending sports sports-related head injury Sports-Related Head Injury American Association of Neurological Surgeons Sports Related – Head Injuries played a role Sports Related – Head Injuries Sports Related – Head Injuries Sports Related – Head Injuries 446,000 sports-related head injuries Sports Related – Head Injuries played a role Sports-related Head Injury most frequent cause top 5 most offending sports most frequent cause Sports Related – Head Injuries most frequent cause Asociación Americana de Cirugía NeurológicaEnlace externo American Association of Neurological Surgeons played a role played a role most frequent cause during the act of heading most frequent cause Sports Related – Head Injuries top 5 most offending sports American Association of Neurological Surgeons most frequent cause most frequent cause most frequent cause equestrian sports 446,000 sports-related head injuries most frequent cause 446,000 sports-related head injuries Updated US Statistics most frequent cause American Association of Neurological Surgeons played a role Sports Related – Head Injuries sports-related head injury most frequent cause most frequent cause most frequent cause American Association of Neurological Surgeons The American Association of Neurological Surgeons American Association of Neurological Surgeons severe disability or death in winter sports source most frequent cause sports with the highest number of reported head injuries most frequent cause football alone most frequent cause Sports-Related Head Injury football alone Sports Related – Head Injuries most frequent cause top 5 most offending sports