Reader D C
Aviat Space Environ Med. 1979 Mar;50(3):267-70.
Concussion resulting from head acceleration could explain the poor survival rates in some types of accidents. Experiments have been conducted on a decelerator using a tracking task to determine whether high head acceleration could affect psychomotor performance. Human subjects were exposed to impact acceleration of O (sham), 5, 10 and 12 -Gx facing forwards. Measurements were made of the linear and angular accelerations experienced at the head and a step tracking task was used to examine psychomotor performance. Electroencephalographs were also recorded. Both the linear and angular accelerations at the head were increased at the higher levels of impact acceleration. At -5Gx there were no significant differences in psychomotor performance when compared with controls, but at -10Gx, and especially -12Gx, significant differences were found. The EEG activity did not vary significantly and no concussive effects were observed in any subject. These results suggest that impairment of psychomotor performance severe enough to jeopardise survival could be produced by high accelerations of the head, though neither linear nor angular acceleration appear to have special significance.
头部加速导致的脑震荡可以解释某些类型事故中生存率较低的原因。已经在减速装置上进行了实验，使用跟踪任务来确定高头部加速度是否会影响心理运动表现。让人类受试者向前面对0（假手术）、5、10和12 -Gx的冲击加速度。测量头部所经历的线性和角加速度，并使用步长跟踪任务来检查心理运动表现。还记录了脑电图。在较高水平的冲击加速度下，头部的线性和角加速度均增加。与对照组相比，在-5Gx时心理运动表现没有显著差异，但在-10Gx，尤其是-12Gx时，发现了显著差异。脑电图活动没有显著变化，并且在任何受试者中均未观察到震荡效应。这些结果表明，头部的高加速度可能会导致严重到危及生存的心理运动表现受损，尽管线性加速度和角加速度似乎都没有特殊意义。
