Effects of forearm posture, wrist posture, gender, and hand on three peak pinch force types

Susan Hallbeck, Abe H. Kamal, Paul E. Harmon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In many industries the hand is utilized as a fixture, pinching in various wrist postures and forearm postures. In an effort to quantify the effects of wrist posture, forearm posture, gender, and dominant/non-dominant hand upon three peak pinch forces, a study was performed. Three pinch types were tested in this study: index pad pinch, middle pad pinch, and three-jaw chuck pinch force. For each pinch exertion condition, one of five wrist postures were employed: neutral, 45° extension, 65° extension, 45° flexion, and 65° flexion. Each pinch was also performed in one of three forearm postures: neutral, full pronation, and full supination. Ten subjects between 20-25 years of age within each gender category were tested giving a total of 20 subjects. Each subject was asked to build up to his or her maximal voluntary contraction using a modified Caldwell regimen, and hold that pinch level for three seconds. Results were analyzed using analysis of variance (ANOVA) with significant effects (gender, hand, pinch type, wrist posture, and forearm posture) tested using post hoc analysis. The results and their implications are discussed.

Original languageEnglish (US)
Title of host publicationProceedings of the Human Factors Society
PublisherPubl by Human Factors Soc Inc
Pages801-805
Number of pages5
Volume1
StatePublished - 1992
Externally publishedYes
EventProceedings of the Human Factors Society 36th Annual Meeting. Part 2 (f 2) - Atlanta, GA, USA
Duration: Oct 12 1992Oct 16 1992

Other

OtherProceedings of the Human Factors Society 36th Annual Meeting. Part 2 (f 2)
CityAtlanta, GA, USA
Period10/12/9210/16/92

ASJC Scopus subject areas

  • Engineering(all)

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    Hallbeck, S., Kamal, A. H., & Harmon, P. E. (1992). Effects of forearm posture, wrist posture, gender, and hand on three peak pinch force types. In Proceedings of the Human Factors Society (Vol. 1, pp. 801-805). Publ by Human Factors Soc Inc.