ArticleJournal of neurophysiology2017
Stability of hand force production. I. Hand level control variables and multifinger synergies.
Article in Journal of neurophysiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.
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Who cites it
34 citing papers in PubMed.
- Stability of movement by a multi-element system: drifts and random walk within and orthogonal to the uncontrolled manifold during multi-finger force production.Experimental brain research · 2026Review
- Whole-body pointing as superposition of two multi-joint components.Experimental brain research · 2026Article
- Stability of performance in a hierarchical system during isometric force production and effects of visual feedback.Experimental brain research · 2025Article
- Force drifts and matching errors in the lower extremities: implications for the control and perception of foot force.Experimental brain research · 2024Article
- Two aspects of feed-forward control of action stability: effects of action speed and unexpected events.Experimental brain research · 2024Article
- Force matching: motor effects that are not reported by the actor.Experimental brain research · 2024Article
- Does muscle fatigue change motor synergies at different levels of neuromotor control?Frontiers in human neuroscience · 2024Article
- Unintentional force drifts in the lower extremities.Experimental brain research · 2023Article
- Unintentional drifts in performance during one-hand and two-hand finger force production.Experimental brain research · 2023Article
- Higher visual gain contributions to bilateral motor synergies and force control.Scientific reports · 2022Article
- Unintentional force drifts across the human fingers: implications for the neural control of finger tasks.Experimental brain research · 2022Article
- Reciprocal and coactivation commands at the level of individual motor units in an extrinsic finger flexor-extensor muscle pair.Experimental brain research · 2022Article
- Recent Advances in the Neural Control of Movements: Lessons for Functional Recovery.Physical therapy research · 2022Review
- Visual feedback improves bimanual force control performances at planning and execution levels.Scientific reports · 2021Article
- One more time about motor (and non-motor) synergies.Experimental brain research · 2021Review
- Synergies at the level of motor units in single-finger and multi-finger tasks.Experimental brain research · 2021Article
- Efference copy in kinesthetic perception: a copy of what is it?Journal of neurophysiology · 2021Review
- Perturbation-induced fast drifts in finger enslaving.Experimental brain research · 2021Article
- Understanding and Synergy: A Single Concept at Different Levels of Analysis?Frontiers in systems neuroscience · 2021Review
- Biomechanics of Vertical Posture and Control with Referent Joint Configurations.Journal of motor behavior · 2021Article
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2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We combined the theory of neural control of movement with referent coordinates and the uncontrolled manifold hypothesis to explore synergies stabilizing the hand action in accurate four-finger pressing tasks. In particular, we tested a hypothesis on two classes of synergies, those among the four fingers and those within a pair of control variables, stabilizing hand action under visual feedback and disappearing without visual feedback. Subjects performed four-finger total force and moment production tasks under visual feedback; the feedback was later partially or completely removed. The "inverse piano" device was used to lift and lower the fingers smoothly at the beginning and at the end of each trial. These data were used to compute pairs of hypothetical control variables. Intertrial analysis of variance within the finger force space was used to quantify multifinger synergies stabilizing both force and moment. A data permutation method was used to quantify synergies among control variables. Under visual feedback, synergies in the spaces of finger forces and hypothetical control variables were found to stabilize total force. Without visual feedback, the subjects showed a force drift to lower magnitudes and a moment drift toward pronation. This was accompanied by disappearance of the four-finger synergies and strong attenuation of the control variable synergies. The indexes of the two types of synergies correlated with each other. The findings are interpreted within the scheme with multiple levels of abundant variables.
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