Document Type : Full Research Paper


1 Instructor, Bioelectric Group, School of Biomedical Engineering, Science and Research Branch, Islamic Azad University

2 Professor, Bioelectric Group, School of Biomedical Engineering, Amirkabir University of Technology

3 Assistant Professor, Bioelectric Group, School of Biomedical Engineering, Amirkabir University of Technology

4 Associate Professor, Bioelectric Group, School of Biomedical Engineering, Amirkabir University of Technology



In drawing movements, the constraints imposed on the trajectory geometry properties and kinematics are known with two laws: 2/3 power law and isochrony phenomenon. In this paper experiments have been designed to study the relation between two empirical laws in straight and curved patterns of drawing movements in 16-18 years old subjects. Providing two models of power is indicated that in drawing movements, invariant features can be defining. These features are independent of subject, direction and size of trajectory and together they can simplify the role of the upper motor control system and decrease the degrees of freedom and the computational complexity.


Main Subjects

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