Predictive Mechanisms Control Grip Force After Impact in Self-Triggered Perturbations.
(2009) Journal of Motor Behavior — Vol. 41, n° 5, p. 411-417 (2009)
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- Authors
Thonnard, Jean-Louis 
- Abstract
- 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.
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Citations
Bleyenheuft, Y., Lefèvre, P., & Thonnard, J.-L. (2009). Predictive Mechanisms Control Grip Force After Impact in Self-Triggered Perturbations. Journal of Motor Behavior, 41(5), 411-417. https://doi.org/10.3200/35-08-084 (Original work published 2009)