Motion quality evaluation of upper limb target-reaching movements

Nianfeng Yang, Ming Zhang, Changhua Huang, Dewen Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalMedical Engineering and Physics
Issue number2
Publication statusPublished - 21 Mar 2002


  • Motion pattern
  • Motion quality
  • Target-reaching movement
  • Upper limb

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering


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