Possible functional roles of phase resetting during walking
Possible functional roles of phase resetting during walking
复制标题
行走过程中相位重置的可能功能作用
DOI：
10.1007/s00422-003-0402-1
复制
发表时间：
2003
影响因子：
1.9
通讯作者：
Shunsuke Sato
中科院分区：
文献类型：
--
作者：
T. Yamasaki;T. Nomura;Shunsuke Sato
摘要。我们对外部冲动扰动的反应显示了相移或“重置”。在这些模型中录制并分析了与正常稳态步行相对应的运动的简化模型和两体运动模型。系统的稳定限制循环解决方案。功能1：给定扰动的适当数量的相位重置可能有助于将系统的状态点重新定位在吸引力盆之外限制循环回到内部。使用相位转变曲线（PTC）或代表我们显示的步行相关响应的相位转变曲线（PTC）或相位重置曲线（PRC）研究的行走节奏。最佳相控制的存在和相应的PTC，可以最佳地实现响应冲动力扰动的理由功能。实验性地观察到人类步行期间的实验。
Abstract. The walking rhythm is known to show phase shift or “reset” in response to external impulsive perturbations. We tried to elucidate functional roles of the phase reset possibly used for the neural control of locomotion. To this end, a system with a double pendulum as a simplified model of the locomotor control and a model of bipedal locomotion were employed and analyzed in detail. In these models, a movement corresponding to the normal steady-state walking was realized as a stable limit cycle solution of the system. Unexpected external perturbations applied to the system can push the state point of the system away from its limit cycle, either outside or inside the basin of attraction of the limit cycle. Our mathematical analyses of the models suggested functional roles of the phase reset during walking as follows. Function 1: an appropriate amount of the phase reset for a given perturbation can contribute to relocating the system's state point outside the basin of attraction of the limit cycle back to the inside. Function 2: it can also be useful to reduce the convergence time (the time necessary for the state point to return to the limit cycle). In experimental studies during walking of animals and humans, the reset of walking rhythm induced by perturbations was investigated using the phase transition curve (PTC) or the phase resetting curve (PRC) representing phase-dependent responses of the walking. We showed, for the simple double-pendulum model, the existence of the optimal phase control and the corresponding PTC that could optimally realize the aforementioned functions in response to impulsive force perturbations. Moreover, possible forms of PRC that can avoid falling against the force perturbations were predicted by the biped model, and they were compared with the experimentally observed PRC during human walking. Finally, physiological implications of the results were discussed.
DOI：
10.1115/1.3138535
发表时间：
1985-01-01
影响因子：
1.7
作者：
AUDU, ML;DAVY, DT
通讯作者：
DAVY, DT
矢状排列的浦肯野细胞在扰动运动过程中的反应：攀爬纤维激活与简单尖峰调制的关系。
影响因子：
2.5
作者：
Lou,JS;Bloedel,JR
通讯作者：
Bloedel,JR
影响因子：
14.5
作者：
CALANCIE, B;NEEDHAMSHROPSHIRE, B;GREEN, BA
通讯作者：
GREEN, BA