Characterization of Concussive Events in Professional American Football Using Videogrammetry
| Autor: | Stephen Beier, Neal Carter, William Neale, Jeffrey Richard Crandall, Ann M. Bailey, David Hessel, Christopher P. Sherwood, James R. Funk |
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| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Image matching technology industry and agriculture Biomedical Engineering Translational velocity American football Poison control Football Kinematics equipment and supplies medicine.disease Physical medicine and rehabilitation Concussion Injury prevention medicine Psychology human activities |
| Zdroj: | Annals of Biomedical Engineering. 48:2678-2690 |
| ISSN: | 1573-9686 0090-6964 |
| Popis: | Sports concussions offer a unique opportunity to study head kinematics associated with mild traumatic brain injury. In this study, a model-based image matching (MBIM) approach was employed to analyze video footage of 57 concussions which occurred in National Football League (NFL) games. By utilizing at least two camera views, higher frame rate footage (> 60 images s−1), and laser scans of the field and helmets involved in each case, it was possible to calculate the change in velocity of the helmet during impact in six degrees of freedom. The average impact velocity for these concussive events was 8.9 ± 2.0 m s−1. The average changes in translational and rotational velocity for the concussed players’ helmets were 6.6 ± 2.1 m s−1 and 29 ± 13 rad s−1, respectively. The average change in translational velocity was higher for helmet-to-ground (n = 16) impacts compared to helmet-to-helmet (n = 30) or helmet-to-shoulder (n = 11) events (p |
| Databáze: | OpenAIRE |
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