Are there general rules for the generation of curvilinear motion of the end-effector? Form and kinematics of the arm trajectory are typically inter-related. A relationship between velocity and curvature of the endpoint path has been previously described and quantified as the two-thirds power law. Here we show that the two-thirds power law holds also for the foot trajectory (during the swing phase) in human locomotion for a wide range of walking speeds and gravitational loads, but air-stepping. In air-stepping, it was violated systematically. The results suggest that the power law represents a general constrain of biological motion, may be attributed to both mechanical and neural factors and can depend on natural interactions with external environment.

Ivanenko, Y.p., Grasso, R., Macellari, V., Lacquaniti, F. (2002). Two-thirds power law in human locomotion: role of ground contact forces. NEUROREPORT, 13(9), 1171-1174.

Two-thirds power law in human locomotion: role of ground contact forces

LACQUANITI, FRANCESCO
2002-01-01

Abstract

Are there general rules for the generation of curvilinear motion of the end-effector? Form and kinematics of the arm trajectory are typically inter-related. A relationship between velocity and curvature of the endpoint path has been previously described and quantified as the two-thirds power law. Here we show that the two-thirds power law holds also for the foot trajectory (during the swing phase) in human locomotion for a wide range of walking speeds and gravitational loads, but air-stepping. In air-stepping, it was violated systematically. The results suggest that the power law represents a general constrain of biological motion, may be attributed to both mechanical and neural factors and can depend on natural interactions with external environment.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/09
English
Air-stepping; Body weight unloading; Contact forces; Foot trajectory; Two-thirds power law; Walking
4
Ivanenko, Y.p., Grasso, R., Macellari, V., Lacquaniti, F. (2002). Two-thirds power law in human locomotion: role of ground contact forces. NEUROREPORT, 13(9), 1171-1174.
Ivanenko, Yp; Grasso, R; Macellari, V; Lacquaniti, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/50013
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