ARACHNOID TRABECULAE AND CSF ROLES IN BLUNT HEAD IMPACTS

摘要

The blunt head impacts due to vehicular collisions, contact sports or falls cause relative motion between the brain and skull and an increase in contact and shear stresses in meningeal region. Several models have been developed to better understand brain injuries. In this study the mechanical role of the fibrous trabeculae and the Cerebrospinal Fluid (CSF) in Subarachnoid space (SAS) is investigated. Two-dimensional solid and fluid global models of the head and a local model of the SAS trabeculae were developed. The CSF pressure distribution and the trabeculae deformations were determined. It is concluded that the arachnoid trabeculae reduce the pressure in the CSF and both play a major role in damping the blunt head impact.