Muscle Synergies in Clinical Practice: Theoretical and Practical Implications

@inproceedings{Torricelli2016MuscleSI,
  title={Muscle Synergies in Clinical Practice: Theoretical and Practical Implications},
  author={Diego Torricelli and Felipe Barroso and Martina Coscia and Cristiano Alessandro and Francesca Lunardini and Elizabeth B. Esteban and Andrea d’Avella},
  year={2016}
}
Understanding how the CNS copes with the redundancy of the musculoskeletal system is a central aim in motor neuroscience and has important implications in the clinical scenario. A long-standing idea hypothesis is that motor control may be simplified by a modular organization, in which several a few muscle synergies are used to organize muscles in functional groups. In this chapter, we present the theory hypothesis of muscle synergies under from a simplified point of view and we describe its… Expand

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References

SHOWING 1-10 OF 70 REFERENCES
Subject-specific muscle synergies in human balance control are consistent across different biomechanical contexts.
TLDR
It is shown that trial-by-trial variations in muscle activation for multidirectional balance control in humans were constrained by a small set of muscle synergies, and Muscle synergies represent consistent motor modules that map intention to action, regardless of the biomechanical context of the task. Expand
Changes in hand muscle synergies in subjects with spinal cord injury: Characterization and functional implications
TLDR
Results suggest that the disruptions and re-organizations of neural circuitry after SCI are reflected by the extracted Muscle synergies, but the question of how muscle synergies can guide rehabilitation interventions remains open. Expand
Muscle Synergies: Implications for Clinical Evaluation and Rehabilitation of Movement.
TLDR
A method called muscle synergy analysis is presented, which can offer clinicians insight into both underlying neural strategies for movement and functional outcomes of muscle activity, and may offer a better view of the neural structure underlying motor behaviors and how they change in motor deficits and rehabilitation. Expand
The neural origin of muscle synergies
TLDR
This commentary argues that shared and task-specific muscle synergies are neurophysiological entities whose combination, orchestrated by the motor cortical areas and the afferent systems, facilitates motor control and motor learning. Expand
Simplified and effective motor control based on muscle synergies to exploit musculoskeletal dynamics
TLDR
This study proposes a principle for the design of a low-dimensional controller, that it endeavors to control the natural dynamics of the limb, taking into account the nature of the task being performed. Expand
Muscle synergies in neuroscience and robotics: from input-space to task-space perspectives
TLDR
This paper refers to the hypothesis that the central nervous system generates desired muscle contractions by combining a small number of predefined modules, called muscle synergies, and suggests that synergy extraction methods should explicitly take into account task execution variables. Expand
Plasticity and modular control of locomotor patterns in neurological disorders with motor deficits
TLDR
This issue is reviewed with a particular emphasis on the various examples of adaptation of locomotor patterns in patients (with large fiber neuropathy, amputees, stroke and spinal cord injury), which highlight plasticity and different solutions to reorganize muscle patterns in both peripheral and central nervous system lesions. Expand
Stability of muscle synergies for voluntary actions after cortical stroke in humans
TLDR
The notion that descending cortical signals represent neuronal drives that select, activate, and flexibly combine muscle synergies specified by networks in the spinal cord and/or brainstem is supported. Expand
Motor primitives and synergies in the spinal cord and after injury—the current state of play
  • S. Giszter, C. Hart
  • Computer Science, Medicine
  • Annals of the New York Academy of Sciences
  • 2013
TLDR
The evidence and different viewpoints on modularity, the neural underpinnings identified thus far, and possible critical issues for the future of this area are discussed. Expand
The number and choice of muscles impact the results of muscle synergy analyses
TLDR
This study used a musculoskeletal model to calculate muscle activations required to perform an isometric upper-extremity task and determined that the structure of synergies is dependent upon the number and choice of muscles included in the analysis, which significantly improved similarity to the master set. Expand
...
1
2
3
4
5
...