Measurement of prehensile grasp capabilities by a force and moment wrench: Methodological development and assessment of manual workers

被引:22
作者
Greig, M [1 ]
Wells, R [1 ]
机构
[1] Univ Waterloo, Dept Kinesiol, Waterloo, ON N2L 3G1, Canada
关键词
force; moment; wrench; instrumentation; strength; hand;
D O I
10.1080/00140130310001611107
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Prehensile grasp capability is typically quantified by pinch and grasp forces. This work was undertaken to develop a methodology to assess complex, multi-axis hand exertions through the measurement of forces and moments exerted by the hand along and about three orthogonal axes originating at the grip centre; termed an external wrench. Instrumentation consisting of a modified pinch/grip dynamometer affixed to a 6 df force cube was developed to simultaneously measure three forces, three moments and the pinch/grip force about the centre of the grip. Twenty right hand dominant manual workers (10 male and 10 female), free of hand or wrist disorders, completed a variety of maximal strength tasks. The randomized block design involved three separate grips - power grip, lateral pinch and pulp pinch. Randomized within each block were three non-concurrent repetitions of isolated maximal force and moment generations along and about the three principle orthogonal axes and a maximal grip force exertion. Trials were completed while standing, with the arm abducted and elbow flexed to 90degrees with a wrist posture near neutral. Where comparable protocols existed in the literature, forces and moments exerted were found to be of similar magnitude to those reported previously. Female and male grip strengths on a Jamar dynamometer were 302.6 N and 450.5 N, respectively. Moment exertions in a power grip (female and male) were 4.7 Nm and 8.1 Nm for pronator, 4.9 Nm and 8.0 Nm for supinator, 6.2 Nm and 10.3 Nm for radial deviator, 7.7 Nm and 13.0 Nm for ulnar deviator, 6.2 Nm and 8.2 Nm for extensor, and 7.1 Nm and 9.3 Nm for flexor moments. Correlations with and between maximal force and moment exertions were only moderate. This paper describes instrumentation that allows comprehensive characterization of prehensile force and moment capability.
引用
收藏
页码:41 / 58
页数:18
相关论文
共 42 条
[1]   VARIATION OF FINGER FORCES IN MAXIMAL ISOMETRIC GRASP TESTS ON A RANGE OF CYLINDER DIAMETERS [J].
AMIS, AA .
JOURNAL OF BIOMEDICAL ENGINEERING, 1987, 9 (04) :313-320
[2]  
An K.N., 1986, TRENDS ERGONOMICS HU, P573
[3]  
[Anonymous], MUSC DIS WORKPL
[4]  
ARMSTRONG TJ, 1982, ANTHROPOMETRY BIOMEC, P183
[5]   DETERMINATION OF AN OPTIMUM SIZE CYLINDRICAL HANDLE BY USE OF ELECTROMYOGRAPHY [J].
AYOUB, MM ;
LOPRESTI, P .
ERGONOMICS, 1971, 14 (04) :509-&
[6]  
BALOGUN JA, 1991, ARCH PHYS MED REHAB, V72, P280
[7]  
BAUMGARTNER T A, 1972, Research Quarterly American Association for Health Physical Education and Recreation, V43, P443
[8]  
Bernard B.P., 1997, REPORT NO DHHS NIOSH
[9]   Effect of grip span on maximal grip force and fatigue of flexor digitorum superficialis [J].
Blackwell, JR ;
Kornatz, KW ;
Heath, EM .
APPLIED ERGONOMICS, 1999, 30 (05) :401-405
[10]   CLUSTER ANALYSIS OF STATIC STRENGTH TESTS [J].
BORCHARDT, JW .
RESEARCH QUARTERLY, 1968, 39 (02) :258-264