Head movements produced during linear translations in unexpected directions.
Head movements produced during linear translations in unexpected directions.
复制标题
沿意想不到的方向线性平移时产生的头部运动。
DOI：
10.1109/iembs.2009.5334734
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Gdowski,GT
中科院分区：
文献类型：
--
作者：
Brown,ET;Luan,H;Gdowski,MJ;Gdowski,GT
身体在空间中的被动平移消除了施加在颈部上的特定方向扭矩的复杂组合。线性平移产生的惯性力矩被维持头部稳定性的线性前庭反射和本体感受反射抵消。在这项研究中使用了一种新的实验装置，以随机和不可预测的方向平移人类受试者，以量化头部相对于平移方向的3-D运动。头部运动被发现产生系统的模式作为刺激方向的函数。滚转和偏航头运动的产生与平移的横向分量的大小成比例。俯仰头的运动与前后平移分量的大小成比例。一个令人惊讶的观察结果是，横向平移过程中产生的头部运动平均比前后平移过程中产生的头部运动小17%。这表明稳定头部的线性前庭反射可能是方向特异性的，并且在横向全身平移期间更活跃。
Passive translation of the body in space elicits a complex combination of directionally-specific torques that are exerted on the neck. The inertial torques that are produced by linear translation are counteracted by linear vestibular and proprioceptive reflexes that maintain head stability. A novel experimental apparatus was used in this study to translate human subjects in a random and unpredictable direction in order to quantify the head's 3-D movement with respect to the direction of translation. Head movements were found to be produced in systematic patterns as a function of stimulus direction. Roll and yaw head movements were produced in proportion to the magnitude of the lateral component of the translation. Pitch head movements were proportionate to the magnitude of the fore-aft component of the translation. One surprising observation was that head movements produced during lateral translations were, on average, 17% smaller than those produced during fore-aft translations. This suggests that linear vestibular reflexes that stabilize the head may be directionally-specific and more active during lateral whole body translations.