An instrumented mouthguard for real-time measurement of head kinematics under a large range of sport specific accelerations

Jones, C. M., Austin, K., Augustus, S. N., Nicholas, K. J., Yu, X., Baker, C., Chan, E. Y. K., Loosemore, M. and Ghajari, M. (2023) An instrumented mouthguard for real-time measurement of head kinematics under a large range of sport specific accelerations. Sensors, 23 (16). p. 7068. ISSN 1424-8220

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Abstract

Background: Head impacts in sports can produce brain injuries. The accurate quantification of head kinematics through instrumented mouthguards (iMG) can help identify underlying brain motion during injurious impacts. The aim of the current study is to assess the validity of an iMG across a large range of linear and rotational accelerations to allow for on-field head impact monitoring. Methods: Drop tests of an instrumented helmeted anthropometric testing device (ATD) were performed across a range of impact magnitudes and locations, with iMG measures collected concurrently. ATD and iMG kinematics were also fed forward to high-fidelity brain models to predict maximal principal strain. Results: The impacts produced a wide range of head kinematics (16–171 g, 1330–10,164 rad/s2 and 11.3–41.5 rad/s) and durations (6–18 ms), representing impacts in rugby and boxing. Comparison of the peak values across ATD and iMG indicated high levels of agreement, with a total concordance correlation coefficient of 0.97 for peak impact kinematics and 0.97 for predicted brain strain. We also found good agreement between iMG and ATD measured time-series kinematic data, with the highest normalized root mean squared error for rotational velocity (5.47 ± 2.61%) and the lowest for rotational acceleration (1.24 ± 0.86%). Our results confirm that the iMG can reliably measure laboratory-based head kinematics under a large range of accelerations and is suitable for future on-field validity assessments.

Publication Type: Articles
Uncontrolled Keywords: piezoelectric sensors; gyroscopes; mouthguard; head kinematics; traumatic brain injury; sporting impacts
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
R Medicine > R Medicine (General)
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Academic Areas > Institute of Sport
Research Entities > Centre for Health and Allied Sport and Exercise Science Research (CHASER)
Related URLs:
SWORD Depositor: Publications Router Jisc
Depositing User: Publications Router Jisc
Date Deposited: 18 Sep 2023 08:48
Last Modified: 11 Jun 2024 10:04
URI: https://eprints.chi.ac.uk/id/eprint/7073

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