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Predictive Mechanisms Control Grip Force After Impact in Self-Triggered Perturbations.

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Bleyenheuft, Yannick [UCL] Lefèvre, Philippe [UCL] Thonnard, Jean-Louis [UCL]

Impulsive loadings during object grasping are common in everyday life. In predictable conditions, the grip force (GF) increases before the impact to anticipate the perturbation and reaches a maximum after the perturbation. In the present study, the authors addressed the predictive or reactive nature of this late GF component. The load of a handheld object was briskly increased by dropping a mass attached to the object (impact trials). The drop was self-induced, but for one third of the trials, the mechanism was blocked and no impact occurred (blank trials). Evidence that the late GF component is programmed as a predictive action emerged from a systematic comparison between impact and blank trials. The authors conclude that the GF increase occurring after a predictable impulsive loading is essentially of a predictive nature.

Document type Article de périodique (Journal article) – Article de recherche – Journal Article
Access type Accès libre
Publication date 2009
Language Anglais
Journal information "Journal of Motor Behavior" - Vol. 41, no. 5, p. 411-417 (2009)
Peer reviewed yes
Publisher Routledge (Philadelphia)
issn 0022-2895
e-issn 1940-1027
Publication status Publié
Affiliations UCL - FSA/INMA - Département d'ingénierie mathématique
UCL - MD/IEPR - Institut d'éducation physique et de réadaptation
UCL - (SLuc) Service de médecine physique et de réadaptation motrice
MESH Subject Young Adult ; Weight-Bearing ; Statistics, Nonparametric ; Reference Values ; Psychomotor Performance - physiology ; Probability Learning ; Middle Aged ; Male ; Humans ; Hand Strength - physiology ; Female ; Adult ; Adaptation, Physiological
Keywords Collision ; Motor control ; precision grip ; Programming
Links
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Bibliographic reference Bleyenheuft, Yannick ; Lefèvre, Philippe ; Thonnard, Jean-Louis. Predictive Mechanisms Control Grip Force After Impact in Self-Triggered Perturbations.. In: Journal of Motor Behavior, Vol. 41, no. 5, p. 411-417 (2009)
Permanent URL http://hdl.handle.net/2078.1/22439