title: Motion quality evaluation of upper limb target-reaching movements.
abstract: Fitts' Law was extended in the polar coordinate system, and a set of indices for human motion evaluation is proposed. In this paper, the index of difficulty and the index of performance are introduced as the general indices for the quality measure of plane target-to-target movement. As an example, the target-reaching movement of the upper limb, which is a basic functional action of upper limbs in the activities of daily living, was experimentally investigated. Five healthy subjects were asked to perform six target-reaching tasks with different indices of difficulty. All movements were recorded using a Vicon motion analysis system. The movement quality was measured using these evaluation indices.
authors.affiliation: Rehabilitation Engineering Research Centre, Department of Precision Instruments, Tsinghua University, Beijing 100084, China.
authors.forename: Nianfeng
authors.initials: N
authors.lastname: Yang
authors.forename: Ming
authors.initials: M
authors.lastname: Zhang
authors.forename: Changhua
authors.initials: C
authors.lastname: Huang
authors.forename: Dewen
authors.initials: D
authors.lastname: Jin
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D001132:Arm / Q000502:physiology*; D006801:Humans; D008297:Male; D008954:Models, Biological; D009068:Movement / Q000502:physiology*; D017711:Nonlinear Dynamics; D011597:Psychomotor Performance / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology; D015203:Reproducibility of Results; D013997:Time Factors