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- Title
Force Control in Manipulation Tasks: Comparison of Two Common Methods of Grip Force Calculation.
- Authors
Uygur, Mehmet; Prebeg, Goran; Jaric, Slobodan
- Abstract
We compared two standard methods routinely used to assess the grip force (GF; perpendicular force that hand exerts upon the hand-held object) in the studies of coordination of GF and load force (LF; tangential force) in manipulation tasks. A variety of static tasks were tested, and GF-LF coupling (i.e., the maximum cross-correlation between the forces) was assessed. GF was calculated either as the minimum value of the two opposing GF components acting upon the hand-held object (GFmin) or as their average value (GFavg). Although both methods revealed high GF-LF correlation coefficients, most of the data revealed the higher values for GFavg than for GFmin. Therefore, we conclude that the CNS is more likely to take into account GFavg than GFmin when controlling static manipulative actions as well as that GFavg should be the variable of choice in kinetic analyses of static manipulation tasks.
- Subjects
GRIP strength; MUSCLE strength; MOTOR ability research; MOTOR ability testing; HAND
- Publication
Motor Control, 2014, Vol 18, Issue 1, p18
- ISSN
1087-1640
- Publication type
Article
- DOI
10.1123/mc.2012-0121