Introduction: In dynamic tasks, we must make online corrections when the position of the body or objects change, which alters the feedforward and feedback mechanisms. This research aimed to determine the effect of postural stability and correction times on a pointing task with uncertain targets.Methodology: 19 young subjects performed a pointing task toward targets that exhibited a change in position (at 200, 400, or 600 ms after) while remaining in a bipedal-firm, a bipedal-foam, and a unipedal-foam surface. Kinematics parameters were recorded during pointing.Results: What affects the precision and duration of pointing is the target change timing, not the postural condition. The target change timing and the postural condition affect the movement strategy, expressed in kinematic parameters of the center of pressure (CoP), the upper-trunk, and the index finger. However, the CoP control responded to the postural demands, while the finger and trunk control responded to the postural requests and the target change timing.Conclusion: Different postural strategies allow the achievement of a pointing task despite the changes in postural conditions. Moreover, the later the target changes, the more challenging it is to correct the reaching trajectory, achieved by a prioritization of the endpoint control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.