80 research outputs found
Analysis of ball carrier head motion during a rugby union tackle without direct head contact: A case study
Rugby union players can be involved in many tackles per game. However, little is known of the regular head loading environment associated with tackling in rugby union. In particular, the magnitude and influencing factors for head kinematics during the tackle are poorly understood. Accordingly, the goal of this study was to measure head motion of a visually unaware ball carrier during a real game tackle to the upper trunk with no direct head contact, and compare the kinematics with previously reported concussive events. Model-Based Image-Matching was utilised to measure ball carrier head linear and angular velocities. Ball carrier componential maximum change in head angular velocities of 38.1, 20.6 and 13.5 rad/s were measured for the head local X (coronal plane), Y (sagittal plane) and Z (transverse plane) axes respectively. The combination of a high legal tackle height configuration and visually unaware ball carrier can lead to kinematics similar to average values previously reported for concussive direct head impacts
Computational neurotrauma—design, simulation, and analysis of controlled cortical impact model
The dynamics of electric powered wheelchair sideways tips and falls: experimental and computational analysis of impact forces and injury
On the characterization of the heterogeneous mechanical response of human brain tissue
The mechanical characterization of brain tissue is a complex task that scientists have tried to accomplish for over 50Â years. The results in the literature often differ by orders of magnitude because of the lack of a standard testing protocol. Different testing conditions (including humidity, temperature, strain rate), the methodology adopted, and the variety of the species analysed are all potential sources of discrepancies in the measurements. In this work, we present a rigorous experimental investigation on the mechanical properties of human brain, covering both grey and white matter. The influence of testing conditions is also shown and thoroughly discussed. The material characterization performed is finally adopted to provide inputs to a mathematical formulation suitable for numerical simulations of brain deformation during surgical procedures.</p
Construction of a risk model through the fusion of experimental data and finite element modeling: Application to car crash-induced TBI
Biofidelic white matter heterogeneity decreases computational model predictions of white matter strains during rapid head rotations
Brain tissue strain and balance impairments in children following a concussion: An exploratory study
Creating a human head finite element model using a multi-block approach for predicting skull response and brain pressure
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