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Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury.

Publication ,  Journal Article
Hernandez, F; Wu, LC; Yip, MC; Laksari, K; Hoffman, AR; Lopez, JR; Grant, GA; Kleiven, S; Camarillo, DB
Published in: Ann Biomed Eng
August 2015

This preliminary study investigated whether direct measurement of head rotation improves prediction of mild traumatic brain injury (mTBI). Although many studies have implicated rotation as a primary cause of mTBI, regulatory safety standards use 3 degree-of-freedom (3DOF) translation-only kinematic criteria to predict injury. Direct 6DOF measurements of human head rotation (3DOF) and translation (3DOF) have not been previously available to examine whether additional DOFs improve injury prediction. We measured head impacts in American football, boxing, and mixed martial arts using 6DOF instrumented mouthguards, and predicted clinician-diagnosed injury using 12 existing kinematic criteria and 6 existing brain finite element (FE) criteria. Among 513 measured impacts were the first two 6DOF measurements of clinically diagnosed mTBI. For this dataset, 6DOF criteria were the most predictive of injury, more than 3DOF translation-only and 3DOF rotation-only criteria. Peak principal strain in the corpus callosum, a 6DOF FE criteria, was the strongest predictor, followed by two criteria that included rotation measurements, peak rotational acceleration magnitude and Head Impact Power (HIP). These results suggest head rotation measurements may improve injury prediction. However, more 6DOF data is needed to confirm this evaluation of existing injury criteria, and to develop new criteria that considers directional sensitivity to injury.

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Published In

Ann Biomed Eng

DOI

EISSN

1573-9686

Publication Date

August 2015

Volume

43

Issue

8

Start / End Page

1918 / 1934

Location

United States

Related Subject Headings

  • Sports
  • Male
  • Humans
  • Female
  • Brain Injuries
  • Biomedical Engineering
  • Biomechanical Phenomena
  • Athletic Injuries
  • Adult
  • 4003 Biomedical engineering
 

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Hernandez, F., Wu, L. C., Yip, M. C., Laksari, K., Hoffman, A. R., Lopez, J. R., … Camarillo, D. B. (2015). Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury. Ann Biomed Eng, 43(8), 1918–1934. https://doi.org/10.1007/s10439-014-1212-4
Hernandez, Fidel, Lyndia C. Wu, Michael C. Yip, Kaveh Laksari, Andrew R. Hoffman, Jaime R. Lopez, Gerald A. Grant, Svein Kleiven, and David B. Camarillo. “Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury.Ann Biomed Eng 43, no. 8 (August 2015): 1918–34. https://doi.org/10.1007/s10439-014-1212-4.
Hernandez F, Wu LC, Yip MC, Laksari K, Hoffman AR, Lopez JR, et al. Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury. Ann Biomed Eng. 2015 Aug;43(8):1918–34.
Hernandez, Fidel, et al. “Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury.Ann Biomed Eng, vol. 43, no. 8, Aug. 2015, pp. 1918–34. Pubmed, doi:10.1007/s10439-014-1212-4.
Hernandez F, Wu LC, Yip MC, Laksari K, Hoffman AR, Lopez JR, Grant GA, Kleiven S, Camarillo DB. Six Degree-of-Freedom Measurements of Human Mild Traumatic Brain Injury. Ann Biomed Eng. 2015 Aug;43(8):1918–1934.
Journal cover image

Published In

Ann Biomed Eng

DOI

EISSN

1573-9686

Publication Date

August 2015

Volume

43

Issue

8

Start / End Page

1918 / 1934

Location

United States

Related Subject Headings

  • Sports
  • Male
  • Humans
  • Female
  • Brain Injuries
  • Biomedical Engineering
  • Biomechanical Phenomena
  • Athletic Injuries
  • Adult
  • 4003 Biomedical engineering