Failure of Arm Movement Control in Stroke Patients, Characterized by Loss of Complexity.

ABSTRACT: We study the mechanism of human arm-posture control by means of nonlinear dynamics and quantitative time series analysis methods. Utilizing linear and nonlinear measures in combination, we find that pathological tremors emerge in patient dynamics and serve as a main feature discriminating between normal and patient groups. The deterministic structure accompanied with loss of complexity inherent in the tremor dynamics is also revealed. To probe the underlying mechanism of the arm-posture dynamics, we further analyze the coupling patterns between joints and components, and discuss their roles in breaking of the organization structure. As a result, we elucidate the mechanisms in the arm-posture dynamics of normal subjects responding to the gravitational force and for the reduction of the dyna

SUBMITTER: Goh S 

PROVIDER: S-EPMC4633101 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature