The influence of the falx and tentorium: A 3D computational study of impacts using detailed FE head models
(English)Manuscript (Other academic)
The influence of the falx and tentorium on biomechanics of the head during impact was studied in the current study with finite element analysis. A study of such has not been done previously in 3D. Three detailed 3D finite element models were created based on images of a healthy person with a normal size head. Two of the models contained the addition of falx and tentorium with different material properties. The models were subjected to coronal and sagittal rotational impulses applied to the skull. The acceleration of the impulse was large enough to theoretically induce diffuse axonal injuries (DAI). Strain distributions in the brain of the different models were compared and the findings indicated that the falx induced large strain to the surrounding brain tissues, especially to the corpus callosum in coronal rotation. The tentorium seemed to constrain motion of the cerebellum while inducing large strain in the brain stem in both rotations. Lower strains in the different lobes while higher strains in the brain stem and corpus callosum which are the classical site for DAI, were found in the model with falx and tentorium. The result indicated the need of modeling dura mater with non-linear elastic material model, which otherwise would have been too stiff. The non-sliding interface of the protruding dura mater is suspected to induce too large strains in adjacent areas and needed to investigate further.
Finite element model, biomechanics, falx, tentorium
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-9582OAI: oai:DiVA.org:kth-9582DiVA: diva2:126645
QC 201008112008-11-192008-11-192010-08-11Bibliographically approved