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首页> 外文期刊>Journal of Neurophysiology >Forward versus backward walking: transfer of podokinetic adaptation.
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Forward versus backward walking: transfer of podokinetic adaptation.

机译：前进与后退：人体运动适应性的传递。

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We asked whether podokinetic adaptation to walking on a circular treadmill transfers to different forms of locomotion. Subjects were blindfolded and asked to walk straight across the floor, in the forward and backward directions, following podokinetic (PK) stimulation that consisted of 30 min of forward walking-in-place on the perimeter of a disk rotating in the clockwise direction. During both forward and backward walking following forward-walking PK stimulation, subjects involuntarily walked along curved trajectories at angular velocities well above vestibular threshold, although they perceived that they were walking along straight paths. The curved paths of forward and backward walking were indistinguishable from one another. Transfer of PK adaptations acquired during forward walking on the turntable to backward walking trials suggests that the PK system controls general locomotor trajectory. Adaptation of the system thus influences forms of locomotion other than that used during acquisition of the adaptation. This transfer also supports the concept that forward and backward walking are controlled by neural networks that share common elements. An interesting feature of the transfer of PK adaptation is that for both forward and backward walking, subjects turned in a counterclockwise direction. As such, the direction of relative rotation between the trunk and feet was maintained for both forward and backward walking. However, the relationship of the lower extremities to the center of rotation was not preserved. The left limb was the inner leg during PK stimulation and forward walking after adaptation, but the left leg was the outer leg during backward walking. These results suggest that PK adaptation affects general locomotor trajectory via a remodeling of the rotational relationship between the trunk and the feet.
机译：我们询问是否适合在圆形跑步机上行走的人体动力学转换为不同形式的运动。受验者（PK）刺激后，被蒙住眼睛并要求他们向前和向后在地板上直走，该刺激由顺时针旋转的圆盘周向原位行走30分钟组成。在向前行走PK刺激后的向前和向后行走过程中，受试者均不自觉地沿弯曲轨迹以远高于前庭阈值的角速度行走，尽管他们认为自己正在沿直线路径行走。向前和向后行走的弯曲路径彼此无法区分。在转盘上向前行走过程中获得的PK适应转移到向后行走试验中表明，PK系统控制着一般的运动轨迹。因此，系统的适应性会影响运动形式，而不是适应性获取过程中所使用的形式。这种转移也支持这样一种概念，即向前和向后步行受共享共同元素的神经网络控制。 PK适应转移的一个有趣特征是，对于向前和向后行走，对象都沿逆时针方向转动。这样，在向前和向后行走时，躯干和脚之间的相对旋转方向都得以保持。但是，下肢与旋转中心的关系并未保留。 PK刺激和适应后向前行走时，左腿为内腿，而向后行走时，左腿为外腿。这些结果表明，PK适应通过对躯干和脚之间的旋转关系进行重塑来影响一般的运动轨迹。

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