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Johnson Ho, Zhou Zhou, Xiaogai Li, Svein Kleiven 

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Presentation on theme: "Johnson Ho, Zhou Zhou, Xiaogai Li, Svein Kleiven "— Presentation transcript:

1 The peculiar properties of the falx and tentorium in brain injury biomechanics 
Johnson Ho, Zhou Zhou, Xiaogai Li, Svein Kleiven  Journal of Biomechanics  Volume 60, Pages (July 2017) DOI: /j.jbiomech Copyright © Terms and Conditions

2 Fig. 1 The models used in the current study.
Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © Terms and Conditions

3 Fig. 2 The implemented linear elastic stress-strain curve (dotted line, Young’s modulus E=31.5MPa) compared to the simulated stress-strain curve of non-linear elastic dura mater (dash-dot line) and the tensile strength (solid line) of dura mater from study (van Noort et al., 1981). Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © Terms and Conditions

4 Fig. 3 Loading conditions based on the reconstruction of a concussive case (case NFL57 from Newman et al., 2000). Translational acceleration and rotational velocities are illustrated for both the non-injured (NFL57H1) (left column) and injured player (NFL57H2) (right column). The rotational velocity curves indicate the head of the no-injured player mainly rotated in the coronal plane, while the injured player had higher levels of coronal and transversal rotation. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © Terms and Conditions

5 Fig. 4 Comparison of peak maximum principal strain of brainstem (BS), corpus callosum (CC) and different lobes of the cerebrum in the FE models for NFL57H1 and NFL57H2. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © Terms and Conditions

6 Fig. 5 (a) Strain distribution in both coronal and transversal cross-sections of the non-injured player (NFL57H1). The head mainly rotated in the coronal plane. (Left) Regions with higher strain were located in the subcortical areas in the baseline model. (Middle) With the inclusion of the non-linear elastic falx and tentorium, the strain level in the subcortical region was reduced. Meanwhile, the strain was increased in the central area such as the brainstem. (Right) The strain level was further reduced in the subcortical region in the brain when the model implemented linear elastic falx and tentorium. On the other hand, the strain level increased in the corpus callosum and brainstem. (b) Strain distribution in both coronal and transverse cross-sections of the injured player. The head had higher levels of both coronal and transversal rotations. Regions with high strain were shifted from peripheral to central region of the brain with the inclusion of the falx and tentorium. Similarly to the non-insured case with mainly coronal rotation, strains became higher in the brainstem and lower in the subcortical regions when the properties of the falx and tentorium were changed from non-linear to linear elasticity. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © Terms and Conditions


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