Finite element brain deformation in adolescent soccer heading

Huber, Colin M.; Patton, Declan A.; Maheshwari, Jalaj; Zhou, Zhou; Kleiven, Svein; Arbogast, Kristy B.

doi:10.1080/10255842.2023.2236746

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…For the four tract-related strains, we identify the peak values accumulated over time during the two head loading protocols (i.e., neck rotation and neck extension). This is motivated since the time-accumulated strain peaks are often used for injury analysis [50, 51]. It is also a compromised strategy to address the disparity of temporal resolution in tMRI (30 tests with a time resolution of 18 ms vs. 3 tests with a time resolution of 19.5 ms vs. 11 tests with a time resolution of 20 ms).…”

Section: Methodsmentioning

confidence: 99%

“…This is motivated since the timeaccumulated strain peaks are often used for injury analysis. 57,58 It is also a compromised strategy to address the disparity of temporal resolution in tMRI (30 tests with a time resolution of 18 ms vs. 3 tests with a time resolution of 19.5 ms vs. 11 tests with a time resolution of 20 ms). For the spatial resolution disparity of tMRI (31 tests with a voxel resolution of 1.5 mm vs. 13 tests with a voxel resolution of 2 mm), its influence on the tract-related strains remains negligible, see Appendix B.…”

Section: Computation Of White Matter Tract-related Strainsmentioning

confidence: 99%

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The white matter fiber tract deforms most in the perpendicular direction duringin vivovolunteer impacts

Zhou,

Olsson,

Gasser

et al. 2024

Preprint

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White matter (WM) tract-related strains are increasingly used to quantify brain mechanical responses, but their dynamics in live human brains during in vivo impact conditions remain largely unknown. Existing research primarily looked into the normal strain along the WM fiber tracts (i.e., tract-oriented normal strain), but it is rarely the case in reality that the fiber tract only endures tract-oriented normal strain. In this study, we aim to extend the measurement of WM deformation by quantifying the normal strain perpendicular to the fiber tract (i.e., tract-perpendicular normal strain) and the shear strain along and perpendicular to the fiber tract (i.e., tract-oriented shear strain and tract-perpendicular shear strain, respectively). To achieve this, we combine the three-dimensional strain tensor from the tagged magnetic resonance imaging (tMRI) with the diffuse tensor imaging (DTI) from an open-access dataset, including 44 volunteer impacts under neck rotations (N = 30, peak angular acceleration: 228.6 (8.3) rad/s2) and neck extensions (N = 14, peak angular acceleration: 185.5 (59.2) rad/s2). The strain tensor is rotated to the coordinate system with one axis aligned with DTI-revealed fiber orientation and then four tract-related strain measures are calculated. The results show that tract-perpendicular normal strain peaks are the largest among the four strain types and tract-oriented normal strains are the lowest. The mean peak values (standard deviation) for tract-oriented normal strain, tract-perpendicular normal strain, tract-oriented shear strain, and tract-perpendicular shear strain are 0.020 (0.005), 0.028 (0.007), 0.024 (0.006) and 0.023 (0.006) under the neck rotation, and 0.013 (0.002), 0.019 (0.004), 0.016 (0.003), and 0.017 (0.003) under the neck extension, respectively. The distribution of tract-related strains is affected by the head loading mode. Our study presents a comprehensive in vivo strain quantification towards a multifaceted understanding of WM dynamics. For the first time, we find the WM fiber tract deforms most in the perpendicular direction, illuminating new fundamental of brain mechanics. The reported strain results can be used to evaluate the biofidelity of computational head models, especially those intended to predict brain strains under non-injurious conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Computation Of White Matter Tract-related Strainsmentioning

confidence: 99%

The white matter fiber tract deforms most in the perpendicular direction duringin vivovolunteer impacts

Zhou,

Olsson,

Gasser

et al. 2024

Preprint

Self Cite

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Investigation of Head Kinematics and Brain Strain Response During Soccer Heading Using a Custom-Fit Instrumented Mouthguard

Barnes-Wood,

McCloskey,

Connelly

et al. 2024

Ann Biomed Eng

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Association football, also known as soccer in some regions, is unique in encouraging its participants to intentionally use their head to gain a competitive advantage, including scoring a goal. Repetitive head impacts are now being increasingly linked to an inflated risk of developing long-term neurodegenerative disease. This study investigated the effect of heading passes from different distances, using head acceleration data and finite element modelling to estimate brain injury risk. Seven university-level participants wore a custom-fitted instrumented mouthguard to capture linear and angular acceleration-time data. They performed 10 headers within a laboratory environment, from a combination of short, medium, and long passes. Kinematic data was then used to calculate peak linear acceleration, peak angular velocity, and peak angular acceleration as well as two brain injury metrics: head injury criterion and rotational injury criterion. Six degrees of freedom acceleration-time data were also inputted into a widely accepted finite element brain model to estimate strain-response using mean peak strain and cumulative strain damage measure values. Five headers were considered to have a 25% concussion risk. Mean peak linear acceleration equalled 26 ± 7.9 g, mean peak angular velocity 7.20 ± 2.18 rad/s, mean peak angular acceleration 1730 ± 611 rad/s2, and 95th percentile mean peak strain 0.0962 ± 0.252. Some of these data were similar to brain injury metrics reported from American football, which supports the need for further investigation into soccer heading.

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