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• W2073610232 abstract "Previous studies using intact and spinalized animals have suggested that coordinated movements can be generated by appropriate combinations of muscle synergies controlled by the central nervous system (CNS). However, which CNS regions are responsible for expressing muscle synergies remains an open question. We address whether the brain stem and spinal cord are involved in expressing muscle synergies used for executing a range of natural movements. We analyzed the electromyographic (EMG) data recorded from frog leg muscles before and after transection at different levels of the neuraxis—rostral midbrain (brain stem preparations), rostral medulla (medullary preparations), and the spinal-medullary junction (spinal preparations). Brain stem frogs could jump, swim, kick, and step, while medullary frogs could perform only a partial repertoire of movements. In spinal frogs, cutaneous reflexes could be elicited. Systematic EMG analysis found two different synergy types: 1) synergies shared between pre- and posttransection states and 2) synergies specific to individual states. Almost all synergies found in natural movements persisted after transection at rostral midbrain or medulla but not at the spinal-medullary junction for swim and step. Some pretransection- and posttransection-specific synergies for a certain behavior appeared as shared synergies for other motor behaviors of the same animal. These results suggest that the medulla and spinal cord are sufficient for the expression of most muscle synergies in frog behaviors. Overall, this study provides further evidence supporting the idea that motor behaviors may be constructed by muscle synergies organized within the brain stem and spinal cord and activated by descending commands from supraspinal areas." @default.
• W2073610232 created "2016-06-24" @default.
• W2073610232 creator A5035447336 @default.
• W2073610232 creator A5052659402 @default.
• W2073610232 creator A5058898734 @default.
• W2073610232 date "2011-09-01" @default.
• W2073610232 modified "2023-10-03" @default.
• W2073610232 title "Modules in the brain stem and spinal cord underlying motor behaviors" @default.
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• W2073610232 doi "https://doi.org/10.1152/jn.00842.2010" @default.
• W2073610232 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3174810" @default.
• W2073610232 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21653716" @default.
• W2073610232 hasPublicationYear "2011" @default.
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