Dynamic postures of the transverse metacarpal arch during typing

Nancy A. Baker, Kaihua Xiu, Krissy Moehling, Zong Ming Li

Research output: Contribution to journalArticlepeer-review


The purpose of this paper is to describe the transverse metacarpal arch (TMA) during a dynamic typing task. Static/relaxed and dynamic typing TMA were collected from 36 right-handed females with musculoskeletal discomfort using a motion capture system. While the angle of right TMA static/relaxed posture (10.1° ± 5.5°) was significantly larger than the left (8.5° ± 5.6°) (P < .05), the right dynamic posture (10.6° ± 4.3°) was not significantly different from the left (10.3° ± 5.5°) (P = .66). Within both these mean scores, there was considerable individual variation, with some subjects demonstrating very flat TMA, and some very curved. The results indicate that TMA angular postures both for static/relaxed and dynamic typing are highly variable both between individuals and between individual hands.

Original languageEnglish (US)
Pages (from-to)810-816
Number of pages7
JournalJournal of Applied Biomechanics
Issue number6
StatePublished - Dec 2013
Externally publishedYes


  • Hand
  • Kinematics
  • Occupational therapy
  • Transverse metacarpal arch

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Rehabilitation


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