Mild brain injury predictors derived from dummy 6DOF motions

Kimpara, H.; Iwamoto, M.

BRIC (BRain Injury Criterion) and RIC (Rotational Injury Criterion) have been proposed as Mild Traumatic Brain Injury (MTBI) predictors. Both predictors had been verified with football players' head impact data. This study employed two human brain Finite Element (FE) models of THUMS ver.3 and SIMon ver.4 to find out correlations between the MTBI predictors and FE-based brain injury predictors such as Cumulative Strain Damage Measure (CSDM). The CSDM is defined as the percent volume of the brain FE model that exceeds a specified first principal strain threshold, which is proposed to predict Diffuse Axonal Injury (DAI) as one of Traumatic Brain Injury. Four vehicular crash test data obtained from NHTSA database of “Query Vehicle Crash Test Database on select test parameters” were applied to calculate MTBI predictors and the FE- based brain injury predictors. Very small number of crash test data demonstrated that the RIC showed strong correlations with CSDMs predicted by the two human brain FE models. Since BRIC and RIC are different in definitions of brain injury mechanisms, further studies are needed to investigate brain injury mechanisms from the medical point of view and verify the effectiveness of the MTBI predictors using more crash test data.

Year

Entry

2011

Rowson S, Beckwith JG, Chu JJ, Leonard DS, Greenwald RM, Duma SM. A six degree of freedom head acceleration measurement device for use in football. J Appl Biomech. February 2011;27(1):8-14.

1970

Hirsch AE, Ommaya AK, Mahone RH. Tolerance of subhuman primate brain to cerebral concussion. In: Gurdjian ES, Lange WA, Patrick LM, Thomas LM, eds. Impact Injury and Crash Protection. Springfield, IL: Charles C. Thomas; 1970:352-369.

2006

Kimpara H, Nakahira Y, Iwamoto M, Miki K, Ichihara K, Kawano S-i, Taguchi T. Investigation of anteroposterior head-neck responses during severe frontal impacts using a brain-spinal cord complex FE model. Stapp Car Crash J. 2006;50:509-544. SAE 2006-22-0019.

1967

Ommaya AK, Yarnell P, Hirsch AE, Harris EH. Scaling of experimental data on cerebral concussion in sub-human primates to concussion threshold for man. In: Proceedings of the 11th Stapp Car Crash Conference. October 10-11, 1967; Anaheim, CA. Warrendale, PA: Society of Automotive Engineers:73-80. SAE 670906.

2000

Nakahira Y, Furukawa K, Niimi H, Ishihara T, Miki K, Matsuoka F. A combined evaluation method and a modified maximum likelihood method for injury risk curves. In: Proceedings of the 2000 International IRCOBI Conference on the Biomechanics of Impact. September 20-22, 2000; Montpellier, France.147-155.