Torso movement constraint in stability of bimanual coordination

Shannon Ringenbach, James C. Kao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This study investigated the relation between postural movement and upper-limb coordination stability. Adults produced bimanual circles using in-phase and anti-phase coordination patterns in time to an increasing rate metronome (i.e., movement-time instruction) in the horizontal (e.g., tabletop) and vertical (e.g., "wall" perpendicular to body) planes. All participants produced the instructed in- and antiphase patterns. Coordination stability (i.e., SD of relative phase) was larger for antiphase than in-phase patterns in both planes; however, anti-phase coordination stability was lower in the vertical plane than in the horizontal plane. Torso movement was larger during anti-phase coordination patterns in the horizontal plane, whereas it was larger during in-phase coordination patterns in the vertical plane. These results indicate that different orientations of the same task can produce different results for stability of coordination. This information may be important for performing and learning complex motor-coordination movements (e.g., playing musical instruments).

Original languageEnglish (US)
Pages (from-to)231-245
Number of pages15
JournalPerceptual and motor skills
Issue number1
StatePublished - Aug 2008

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Sensory Systems


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