On-off intermittency in a human balancing task

被引：274

作者：

Cabrera, JL ^{[1
]}

Milton, JG ^{[1
]}

机构：

[1] Univ Chicago, Dept Neurol, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.89.158702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Motion analysis in three dimensions demonstrate that the fluctuations in the vertical displacement angle of a stick balanced at the fingertip obey a scaling law characteristic of on-off intermittency and that >98% of the corrective movements occur fast compared to the measured time delay. These experimental observations are reproduced by a model for an inverted pendulum with time-delayed feedback in which parametric noise forces a control parameter across a particular stability boundary. Our observations suggest that parametric noise is an essential, but up until now underemphasized, component of the neural control of balance.

引用

页码：158702/1 / 158702/4

页数：4

共 25 条

[1] Analysis of the behavior of a random nonlinear delay discrete equation [J].