Development of Improved Brain Injury Predictors for Diverse Impacts

Authors: Lee F. Gabler, Jeff R. Crandall, and Matthew B. Panzer—University of Virginia, Center for Applied Biomechanics; Norbert Praxl—Partnership for Dummy Technology and Biomechanics; Philipp Wernicke—BMW Group

Abstract

Tissue-level deformation is the mechanism for brain injury, and rotational head motion is the mechanism for brain deformation. While numerous rotational metrics have been proposed, many do not represent the mechanics principles that govern brain deformation rendering them ineffective for application over a broad range of head impacts. This study highlights the development of two new brain injury metrics based on deformation response from a second order mechanical system, which are proposed as predictors of a strain-based brain injury metric: maximum principal strain (MPS) from finite element (FE) models. Efficacy of the proposed metrics was verified computationally by comparing kinematics-based predictions of MPS to those obtained from FE simulation of nearly 1600 head impacts. Relative to existing criteria, the new metrics correlated better with MPS across various impact modes, and may provide a more reliable tool for brain injury assessment in a broad range of head impacts.

Type: Short Communication

© Stapp Association, 2017

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