TY  - JOUR
PY  - 1997//
TI  - Brain Kinematics in Physical Model Tests With Translational and Rotational Acceleration
JO  - International journal of crashworthiness
A1  - Viano, David C.
A1  - Aldman, B.
A1  - Pape, K
A1  - van Hoof, J.
A1  - von Holst, Hans
SP  - 191
EP  - 206
VL  - 2
IS  - 2
N2  - Brain responses in closed-head impact were simulated in a physical model of the parasagittal section. During head impact, high-speed movies filmed motion of grid-points in the transparent silicone brain gel that is separated from the skull by a thin liquid layer representing the CSF. Gel displacement and Green-Lagrange strain were calculated from digitised films. For 10,200 r/s (sup)2 angular acceleration, gel displacement and slip along the skull boundary were +/-15 mm near the perimeter. Tensile strain reached 40-70% near the base of the skull, and shear strain was 40-50% in the frontal and occipital regions. For 200 g linear acceleration, there was gt 20 mm brain displacement as the skull compressed the frontal region, and gel separated from the occiput. Tensile strain was 15-25% in the frontal, central and occipital regions, and shear strain was lt 15%. Brain injury mechanisms are discussed. The physical model tests are well-documented, and may help refine finite element models of brain displacement and deformation during closed-head head impact.     <p>Language: en</p>
LA  - en
SN  - 1358-8265
UR  - http://dx.doi.org/
ID  - ref1
ER  -