School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada;
J Neurosurg. 2014 Feb;120(2):453-61. doi: 10.3171/2013.10.JNS131101. Epub 2013 Dec 6.
The purpose of this study was to examine how the dynamic response and brain deformation of the head and brain-representing a series of injury reconstructions of which subdural hematoma (SDH) was the outcome-influence the location of the lesion in the lobes of the brain.
Sixteen cases of falls in which SDH was the outcome were reconstructed using a monorail drop rig and Hybrid III headform. The location of the SDH in 1 of the 4 lobes of the brain (frontal, parietal, temporal, and occipital) was confirmed by CT/MR scan examined by a neurosurgeon.
The results indicated that there were minimal differences between locations of the SDH for linear acceleration. The peak resultant rotational acceleration and x-axis component were larger for the parietal lobe than for other lobes. There were also some differences between the parietal lobe and the other lobes in the z-axis component. Maximum principal strain, von Mises stress, shear strain, and product of strain and strain rate all had differences in magnitude depending on the lobe in which SDH was present. The parietal lobe consistently had the largest-magnitude response, followed by the frontal lobe and the occipital lobe.
The results indicated that there are differences in magnitude for rotational acceleration and brain deformation metrics that may identify the location of SDH in the brain.
本研究旨在探讨头部的动态响应和变形以及代表一系列损伤重建的脑变形（其中硬脑膜下血肿[SDH]是结果）如何影响脑叶的病变位置。
使用单轨落塔和 Hybrid III 头模对 16 例因 SDH 而导致跌倒的案例进行重建。神经外科医生通过 CT/MR 扫描确定了脑 4 个叶之一（额叶、顶叶、颞叶和枕叶）中的 SDH 位置。
结果表明，线性加速度的 SDH 位置之间差异很小。顶叶的峰值合成旋转加速度和 x 轴分量大于其他叶。z 轴分量在顶叶和其他叶之间也存在一些差异。最大主应变、von Mises 应力、剪切应变以及应变和应变率的乘积都根据 SDH 存在的叶而在幅度上存在差异。顶叶的响应幅度始终最大，其次是额叶和枕叶。
结果表明，旋转加速度和脑变形指标的幅度存在差异，这可能确定脑内 SDH 的位置。
