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Accounting for Variance in Concussion Tolerance Between Individuals: Comparing Head Accelerations Between Concussed
Steven Rowson1, Eamon T Campolettano2, Stefan M Duma2
1Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA. srowson@vt.edu.
Annals of Biomedical Engineering
|July 26, 2019
Summary
Concussed football players experience significantly more head impacts than matched controls. Individual impact history and tolerance are crucial for understanding concussion risk, not just general data.
Area of Science:
- Sports Medicine
- Biomechanics
- Neurology
Background:
- Concussion biomechanics in football are studied using head impact data.
- The link between impact biomechanics and clinical outcomes remains unclear.
- Individual head impact history influences concussion injury tolerance.
Purpose of the Study:
- To compare head impact biomechanics between concussed and non-concussed football players.
- To investigate the role of individual impact history in concussion risk.
- To determine if cohort-wide assessments are valuable for concussion context.
Main Methods:
- Instrumented 502 college football players with helmet accelerometers.
- Matched concussed subjects (44 players, 49 concussions) with control subjects based on height, mass, age, race, and concussion history.
- Compared biomechanical measures of impact frequency and acceleration magnitude between groups.
Main Results:
- Concussed subjects had 93.8 more head impacts than controls (p=0.0031).
- Concussed subjects experienced 10.2 more high-magnitude impacts (p=0.0157).
- Concussed subjects had 1.9x greater risk-weighted exposure (p=0.0175).
Conclusions:
- Head impact data must be analyzed at the individual level.
- Cohort-wide assessments of head impacts may not be valuable for concussion.
- Individualized analysis is key to understanding concussion biomechanics and risk.
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