Evidence for basic units of upper limb muscle synergies underlying a variety of complex human manipulations

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  • Hiroki Saito
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
  • Hikaru Yokoyama
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
  • Atsushi Sasaki
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
  • Tatsuya Kato
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
  • Kimitaka Nakazawa
    Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan

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<jats:p> We expanded upon experiments that investigated motor modularity in upper limb movements in humans. The identification of modular features, including distinct functional muscle weightings, during highly variable manipulation tasks supports a hypothetical neural mechanism in which the CNS combines preexisting basic patterns of muscle synergies rather than framing new patterns to deal with behavioral diversity in the upper limb. </jats:p>

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