ArticleFrontiers in human neuroscience2017
Gravitational and Dynamic Components of Muscle Torque Underlie Tonic and Phasic Muscle Activity during Goal-Directed Reaching.
Article in Frontiers in human neuroscience, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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Who cites it
21 citing papers in PubMed.
- A framework for quantifying the mechanics of dexterous grasp.bioRxiv : the preprint server for biology · 2026Article
- Joint Angle Trajectories Are Robust to Segment Length Estimation Methods in Human Reaching.bioRxiv : the preprint server for biology · 2025Article
- Stroke-Related Changes in Tonic and Phasic Muscle Recruitment During Reaching Reveal Pathway-Specific Motor Deficits.bioRxiv : the preprint server for biology · 2025Article
- Hypergravity is more challenging than microgravity for the human sensorimotor system.NPJ microgravity · 2025Article
- Control signal dimensionality depends on limb dynamics.PloS one · 2025Article
- Joint angle trajectories are Robust to segment length estimation methods in human reaching.PloS one · 2025Article
- Stroke-Related Changes in Tonic and Phasic Muscle Recruitment During Reaching Reveal Pathway-Specific Motor Deficits.Journal of central nervous system disease · 2025Article
- Neural Networks-Based Approach to Solve Inverse Kinematics Problems for Medical Applications.Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference · 2024Article
- Differential Impact of Biomechanical Constraints on Control Signal Dimensionality for Gravity Support Versus Propulsion.bioRxiv : the preprint server for biology · 2024Article
- Impedance-based biomechanical method for robust inverse kinematics from noisy data.IEEE sensors letters · 2024Article
- Reoptimization of single-joint motor patterns to non-Earth gravity torques induced by a robotic exoskeleton.iScience · 2023Article
- The human motor cortex contributes to gravity compensation to maintain posture and during reaching.Journal of neurophysiology · 2023Article
- The reserve of joint torque determines movement coordination.Scientific reports · 2021Article
- Stroke impairs the control of isometric forces and muscle activations in the ipsilesional arm.Scientific reports · 2021Article
- Muscle torques and joint accelerations provide more sensitive measures of poststroke movement deficits than joint angles.Journal of neurophysiology · 2021Article
- A segmented forearm model of hand pronation-supination approximates joint moments for real time applications.International IEEE/EMBS Conference on Neural Engineering : [proceedings]. International IEEE EMBS Conference on Neural Engineering · 2021Article
- A cross-species neural integration of gravity for motor optimization.Science advances · 2021Article
- Detailed characterization of physiological EMG activations and directional tuning of upper-limb and trunk muscles in point-to-point reaching movements.Current research in physiology · 2021Article
- Computational evidence for nonlinear feedforward modulation of fusimotor drive to antagonistic co-contracting muscles.Scientific reports · 2020Article
- Motor Planning of Vertical Arm Movements in Healthy Older Adults: Does Effort Minimization Persist With Aging?Frontiers in aging neuroscience · 2020Article
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3 authors.
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Abstract
Human reaching movements require complex muscle activations to produce the forces necessary to move the limb in a controlled manner. How gravity and the complex kinetic properties of the limb contribute to the generation of the muscle activation pattern by the central nervous system (CNS) is a long-standing and controversial question in neuroscience. To tackle this issue, muscle activity is often subdivided into static and phasic components. The former corresponds to posture maintenance and transitions between postures. The latter corresponds to active movement production and the compensation for the kinetic properties of the limb. In the present study, we improved the methodology for this subdivision of muscle activity into static and phasic components by relating them to joint torques. Ten healthy subjects pointed in virtual reality to visual targets arranged to create a standard center-out reaching task in three dimensions. Muscle activity and motion capture data were synchronously collected during the movements. The motion capture data were used to calculate postural and dynamic components of active muscle torques using a dynamic model of the arm with 5 degrees of freedom. Principal Component Analysis (PCA) was then applied to muscle activity and the torque components, separately, to reduce the dimensionality of the data. Muscle activity was also reconstructed from gravitational and dynamic torque components. Results show that the postural and dynamic components of muscle torque represent a significant amount of variance in muscle activity. This method could be used to define static and phasic components of muscle activity using muscle torques.
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