Muscle Synergies for Turning During Human Walking

Yoonjin Choi, Yushin Kim, Minhee Kim, Bum Chul Yoon

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Muscle synergy describes reduced set of functional muscle co-activation patterns. We aimed to identify muscle synergies of turning compared with straight walking. Twelve healthy adults (men: 7, women: 5) performed straight walking (SW), left turning (LT), and right turning (RT) at self-selected speeds. By using non-negative matrix factorization (NMF), we extracted muscle synergies from sixteen electromyography (EMG) signals on the right side and assigned similar muscle synergies among SW, LT, and RT into the same cluster by combining k-means clustering and intraclass correlation coefficient (ICC) analysis. We obtained task-specific clusters of muscle synergies extracted from SW, LT, or RT condition and identified the clusters that share synergies among the conditions. The central nervous system produces specific synergies involving turning behaviors and fundamental synergies for walking.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalJournal of Motor Behavior
Issue number1
Publication statusPublished - 2019 Jan 2


  • curvilinear walking
  • electromyography
  • non-negative matrix factorization
  • synergy

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience


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