Generalization of motor adaptation to repeated-slip perturbation across tasks.
Generalization of motor adaptation to repeated-slip perturbation across tasks.
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运动适应跨任务重复滑动扰动的泛化。
DOI：
10.1016/j.neuroscience.2011.02.039
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发表时间：
2011
期刊：
影响因子：
3.3
通讯作者：
Pai,Y-C
中科院分区：
文献类型：
--
作者：
Wang,T-Y;Bhatt,T;Yang,F;Pai,Y-C
类似的适应性改善了在不同的日常任务（例如，从坐到站和行走）作为抗福尔斯的扰动训练的结果。然而，目前还不清楚这种相似性是否或在多大程度上实际上促进了任务间的泛化。因此，本研究的目的是确定年轻人是否真的可以转移他们的自适应控制，获得从坐到站滑，以提高他们的可能性，从一个突然的新滑走。受试者在经历步行过程中突然出现的新的滑倒之前，在坐立转换过程中经历了重复的滑倒（训练组，n=20），或者在相同的步态滑倒之前没有接受过任何先前的训练（对照组，n=23）。受试者在训练后（未受干扰）步态模式中表现出训练诱导的稳定性改善主动控制的泛化，该步态模式比他们自己的训练前模式以及对照组受试者的步态模式更稳定。训练组在突然出现新的步态滑步时，福尔斯和平衡丧失的发生率均显著低于对照组，这是由于训练组对肢体支撑和滑步速度的反应性控制得到改善，从而直接影响其COM稳定性的控制。当受试者的中枢神经系统在初始训练期间重新校准稳定性极限的非任务特异性的一般化表示以指导其前馈调整和其反馈响应时，可以发生这种转移。任务间概括的研究结果表明，通过扰动训练范式诱导的行为变化有可能防止循环和非循环活动范围内的福尔斯跌倒。
Similar adaptations improve both proactive and reactive control of center-of-mass (COM) stability and limb support against gravity during different daily tasks (e.g., sit-to-stand and walking) as a consequence of perturbation training for resisting falls. Yet it is unclear whether—or to what extent—such similarities actually promote inter-task generalization. The purpose of this study was therefore to determine whether young adults could indeed transfer their adaptive control, acquired from sit-to-stand-slip, to improve their likelihood of a recovery from an unannounced novel slip in walking. Subjects underwent either repeated slips during sit-to-stand before experiencing an unannounced, novel slip during walking (training group, n=20), or they received no prior training before the same gait-slip (control group, n=23). The subjects demonstrated training-induced generalization of their improved proactive control of stability in post-training (unperturbed) gait pattern that was more stable against backward balance loss than was that of their own pre-training pattern as well the gait pattern of the subjects in the control group. Upon the unannounced novel gait-slip, the training group showed significantly lower incidence of both falls and balance loss than that shown by the control, resulting from the improvements in the reactive control of limb support and slip velocity, which directly influenced the control of their COM stability. Such transfer could occur when the subjects' central nervous system recalibrates the non-task-specific, generalized representation of stability limits during the initial training to guide both their feed-forward adjustments and their feedback responses. The findings of the inter-task generalization suggests that behavioral changes induced via the perturbation training paradigm have the potential to prevent falls across the spectrum of cyclic and non-cyclic activities.