TY - JOUR
T1 - Similar Motion of a Hand-held Object may Trigger Nonsimilar Grip Force Adjustments
AU - Gao, Fan
AU - Latash, Mark L.
AU - Zatsiorsky, Vladimir M.
N1 - Funding Information:
This work was supported in part by grants AR-048563, AG-018751, and NS 35032 from the National Institutes of Health, USA.
PY - 2007/10
Y1 - 2007/10
N2 - The tight coupling between load (L) and grip (G) forces during voluntary manipulation of a hand-held object is well established. The current study is to examine grip-load force coupling when motion of the hand with an object was either self-generated (voluntary) or externally generated. Subjects performed similar cyclic movements of different loads at various frequencies with three types of manipulations: 1) voluntary oscillation, 2) oscillating the right arm via the pulley system by the left leg (self-driven oscillation), and 3) oscillating the arm via the pulley system by another person (other-driven oscillation). During the self-generated movements: 1) the grip forces were larger and 2) grip-load force modulation was more pronounced than in the externally generated movements. The G-L adjustments are not completely determined by the mechanics of object motion; nonmechanical factors related to movement performance, for instance perceptual factors, may affect the G-L coupling.
AB - The tight coupling between load (L) and grip (G) forces during voluntary manipulation of a hand-held object is well established. The current study is to examine grip-load force coupling when motion of the hand with an object was either self-generated (voluntary) or externally generated. Subjects performed similar cyclic movements of different loads at various frequencies with three types of manipulations: 1) voluntary oscillation, 2) oscillating the right arm via the pulley system by the left leg (self-driven oscillation), and 3) oscillating the arm via the pulley system by another person (other-driven oscillation). During the self-generated movements: 1) the grip forces were larger and 2) grip-load force modulation was more pronounced than in the externally generated movements. The G-L adjustments are not completely determined by the mechanics of object motion; nonmechanical factors related to movement performance, for instance perceptual factors, may affect the G-L coupling.
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U2 - 10.1197/j.jht.2007.06.002
DO - 10.1197/j.jht.2007.06.002
M3 - Article
C2 - 17954351
AN - SCOPUS:35348817257
SN - 0894-1130
VL - 20
SP - 300
EP - 308
JO - Journal of Hand Therapy
JF - Journal of Hand Therapy
IS - 4
ER -