Unveiling the neuromechanical mechanisms underlying the synergistic interactions in human sensorimotor system
Kwon, H. J.
Hahn, J. O.
Shim, J. K.
PublisherSpringer Science and Business Media LLC
MetadataShow full item record
AbstractMotor synergies are neural organizations of a set of redundant motor effectors that interact with one another to compensate for each other’s error and ensure the stabilization of a performance variable. Recent studies have demonstrated that central nervous system synergistically coordinates its numerous motor effectors through Bayesian multi-sensory integration. Deficiency in sensory synergy weakens the synergistic interaction between the motor effectors. Here, we scrutinize the neuromechanical mechanism underlying this phenomenon through spectral analysis and modeling. We validate our model-generated results using experimental data reported in the literature collected from participants performing a finger force production task with and without tactile feedback (manipulated through injection of anesthetic in fingers). Spectral analysis reveals that the error compensation feature of synergies occurs only at low frequencies. Modeling suggests that the neurophysiological structures involving short-latency back-coupling loops similar to the well-known Renshaw cells explain the deterioration of synergy due to sensory deprivation. © 2021, The Author(s).
SponsorsKorea Institute of Machinery and Materials
Identifier to cite or link to this itemhttp://hdl.handle.net/10713/14364
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0