Operational and maximal workspace of the thumb

Jie Tang, Xudong Zhang, Zong Ming Li

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The purposes were to examine the workspace of the thumb during its operational (submaximal and random) movement and to compare the operational workspace with its maximal workspace. Fifteen female subjects with asymptomatic hands performed the thumb circumduction and operational motion. Linear and angular measurements of the thumb were obtained by a marker-based motion analysis system. During the circumduction, the linear ranges of motion of the thumb tip were 102.8 ± 9.9 mm and 130.7 ± 14.1 mm in abduction/adduction and flexion/extension directions, respectively, and the corresponding values for the operational motion were 67.3 ± 16.1 mm and 73.1 ± 18.0 mm, respectively. The angular ranges of motion of the carpometacarpal (CMC) and metacarpophalangeal joints during the operational motion were less than 65% of their maximal motion ranges. In addition, the CMC joint tended to move in directions oblique to its anatomical defined axes. The results of operational motion may provide guidelines for ergonomic design of thumb-operated tools and hand-held electronics devices.

Original languageEnglish (US)
Pages (from-to)1109-1118
Number of pages10
JournalErgonomics
Volume51
Issue number7
DOIs
StatePublished - Jul 2008
Externally publishedYes

Keywords

  • Hand
  • Movement
  • Operational
  • Thumb
  • Workspace

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Physical Therapy, Sports Therapy and Rehabilitation

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