![]() ![]() These were then used as input to a detailed 3D high-fidelity finite element model of brain injury biomechanics to estimate strain and strain rate within the brain. Video analysis was used to guide physical reconstructions of these impacts, allowing us to estimate the impact kinematics. Forty-one control impacts were selected where there was no observable evidence of neurological signs, resulting in 82 videos of impacts for analysis. We identified 20 head impacts that showed clear video signs of loss of consciousness and 21 showing clear abnormal posturing. Videos were then analysed for signs of neurological events. We reviewed 1280 National Football League American football games and selected cases where the team’s medical personnel made a diagnosis of concussion. Here, we investigate the strain and strain rates produced by professional American football impacts that led to loss of consciousness, posturing or no neurological signs. The biomechanical effect of impacts can be estimated using computational models of strain within the brain. However, it is unknown why head impacts that appear similar produce distinct neurological effects. ![]() ![]() Sports related head injuries can cause transient neurological events including loss of consciousness and dystonic posturing. ![]()
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