ArticleScientific reports2021
Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Stroke increases motor output variability during maximal voluntary isometric contractions of knee extensor muscles in adults.Physiological reports · 2026Article
- Closed-loop rehabilitation of upper-limb dyskinesia after stroke: from natural motion to neuronal microfluidics.Journal of neuroengineering and rehabilitation · 2025Review
- Spinal maps of motoneuron activity during human locomotion: neuromechanical considerations.Frontiers in physiology · 2024Review
- Impact of unilateral and bilateral impairments on bimanual force production following stroke.Journal of neurophysiology · 2023Article
- Upper Limb Sensory-Motor Control During Exposure to Different Mechanical Environments in Multiple Sclerosis Subjects With No Clinical Disability.Frontiers in neurorobotics · 2022Article
- Alterations in motor modules and their contribution to limitations in force control in the upper extremity after stroke.Frontiers in human neuroscience · 2022Article
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Authors and funding
5 authors.
Funding
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Abstract
Stroke often impairs the control of the contralesional arm, thus most survivors rely on the ipsilesional arm to perform daily living activities that require an efficient control of movements and forces. Whereas the ipsilesional arm is often called 'unaffected' or 'unimpaired', several studies suggested that during dynamic tasks its kinematics and joint torques are altered. Is stroke also affecting the ability of the ipsilesional arm to produce isometric force, as when pushing or pulling a handle? Here, we address this question by analyzing behavioral performance and muscles' activity when subjects applied an isometric force of 10 N in eight coplanar directions. We found that stroke affected the ability to apply well-controlled isometric forces with the ipsilesional arm, although to a minor extent compared to the contralesional arm. The spinal maps, the analysis of single muscle activities and the organization of muscle synergies highlighted that this effect was mainly associated with abnormal activity of proximal muscles with respect to matched controls, especially when pushing or pulling in lateral directions.
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