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Simulation of acute subdural haematoma and diffuse axonal injury in coronal head impact

Simulation of acute subdural haematoma and diffuse axonal injury in coronal head impact
Simulation of acute subdural haematoma and diffuse axonal injury in coronal head impact
Coronal head impacts were simulated in a physical model, based on the hypothesis that acute subdural hematoma (ASDH) is related to cerebral vertex displacement and diffuse axonal injury (DAI) to local Green–Lagrange strain. The geometry of the 2D model was based on anatomical measurements taken from the MRI scans of 10 adult males. Silicone gel modelled the cerebrum, paraffin the CSF and elastic membranes the trabeculae of the sulci. Pendulum impacts gave peak angular acceleration of 7800 rad s?2 in models with and without sulci. The motion of the gel and Green–Lagrange strain were calculated from tracked coordinates of Patrick markers. Worst-case bridging vein strains are produced on the contrecoup side and are approximately doubled by adding sulci. Given that axons in the corpus callosum are highly oriented, Green–Lagrange strain was resolved in the fibre direction. It is found to be close to the minimum principal strain, indicating a degree of natural, teleological protection for the axons. The data support the use of as a suitable descriptor for the risk of DAI but not for ASDH.
brain injury, head impact, subdural hematoma, diffuse axonal injury, physical model
0021-9290
85-94
Bradshaw, D.R.S.
f563fe13-16af-4a0d-8f10-ca03e0670c1b
Ivarsson, J.
891eb2d4-39c5-47e4-be3d-8f9647abff28
Morfey, C.L.
d5f9a8d0-7d8a-4915-a522-bf49dee111f2
Viano, D.C.
acb6f43b-c596-4a7a-9507-3b5733884a07
Bradshaw, D.R.S.
f563fe13-16af-4a0d-8f10-ca03e0670c1b
Ivarsson, J.
891eb2d4-39c5-47e4-be3d-8f9647abff28
Morfey, C.L.
d5f9a8d0-7d8a-4915-a522-bf49dee111f2
Viano, D.C.
acb6f43b-c596-4a7a-9507-3b5733884a07

Bradshaw, D.R.S., Ivarsson, J., Morfey, C.L. and Viano, D.C. (2001) Simulation of acute subdural haematoma and diffuse axonal injury in coronal head impact. Journal of Biomechanics, 34 (1), 85-94. (doi:10.1016/S0021-9290(00)00135-4).

Record type: Article

Abstract

Coronal head impacts were simulated in a physical model, based on the hypothesis that acute subdural hematoma (ASDH) is related to cerebral vertex displacement and diffuse axonal injury (DAI) to local Green–Lagrange strain. The geometry of the 2D model was based on anatomical measurements taken from the MRI scans of 10 adult males. Silicone gel modelled the cerebrum, paraffin the CSF and elastic membranes the trabeculae of the sulci. Pendulum impacts gave peak angular acceleration of 7800 rad s?2 in models with and without sulci. The motion of the gel and Green–Lagrange strain were calculated from tracked coordinates of Patrick markers. Worst-case bridging vein strains are produced on the contrecoup side and are approximately doubled by adding sulci. Given that axons in the corpus callosum are highly oriented, Green–Lagrange strain was resolved in the fibre direction. It is found to be close to the minimum principal strain, indicating a degree of natural, teleological protection for the axons. The data support the use of as a suitable descriptor for the risk of DAI but not for ASDH.

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More information

Published date: 2001
Keywords: brain injury, head impact, subdural hematoma, diffuse axonal injury, physical model

Identifiers

Local EPrints ID: 10238
URI: https://eprints.soton.ac.uk/id/eprint/10238
ISSN: 0021-9290
PURE UUID: 74c3e3d2-04b9-4d02-b688-0386ade2e8fc

Catalogue record

Date deposited: 09 May 2005
Last modified: 17 Jul 2017 17:07

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