Split-Belt walking induces changes in active, but not passive, perception of step length.
Split-Belt walking induces changes in active, but not passive, perception of step length.
复制标题
分带行走会引起主动而非被动步长感知的变化。
DOI：
10.1038/s41598-019-52860-9
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发表时间：
2019
影响因子：
4.6
通讯作者：
Torres-Oviedo,Gelsy
中科院分区：
文献类型：
--
作者：
Sombric,Carly;Gonzalez-Rubio,Marcela;Torres-Oviedo,Gelsy
成功的运动控制需要准确地估计我们的身体在空间的计划，执行和评估我们的行动的结果。研究表明，肢体位置的估计容易受到运动适应的影响。然而，在运动中没有发现类似的效果，可能是由于它的测试方式。我们假设双腿以不同速度运动的劈带行走会改变对双腿位置的估计。因此，我们评估了年轻受试者在移动腿（主动感知）或实验者移动腿（被动感知）时对步长（即脚着地时的脚间距离）的感知。我们发现，劈裂带行走后，主动感知的步长发生了很大的变化，而被动感知的变化很小。这表明，分叉带行走诱导了传出信号的适应，而不改变感觉信号。我们还发现，积极的感知转移对测试方式很敏感：在后腿和短步长时最明显。我们的研究结果表明，劈带步行可以调节中风后对步长的感知不足，这可能会导致步态不对称，损害患者的行动能力。
Successful motor control requires accurate estimation of our body in space for planning, executing, and evaluating the outcome of our actions. It has been shown that the estimation of limb position is susceptible to motor adaptation. However, a similar effect has not been found in locomotion, possibly due to how it was tested. We hypothesized that split-belt walking with the legs moving at different speeds changes the estimation of the legs’ position when taking a step. Thus, we assessed young subjects’ perception of step length (i.e., inter-feet distance at foot landing) when they moved their legs (active perception) or when the legs were moved by the experimenter (passive perception). We found that the active perception of step length was substantially altered following split-belt walking, whereas passive perception exhibited minor changes. This suggests that split-belt walking induced the adaptation of efferent signals, without altering sensory signals. We also found that active perceptual shifts were sensitive to how they were tested: they were most salient in the trailing leg and at short step lengths. Our results suggest that split-belt walking could modulate the deficient perception of step length post-stroke, which may contribute to gait asymmetries impairing patients’ mobility.
影响因子：
3.7
作者：
't Hart BM;Henriques DY
通讯作者：
Henriques DY
与达到适应相比，本体感觉重新校准发生缓慢
影响因子：
2
作者：
Basel Zbib;D. Henriques;E. K. Cressman
通讯作者：
E. K. Cressman
影响因子：
1.3
作者：
N. Spear
通讯作者：
N. Spear