Early switching between movement types: Indication of predictive control?

S. Levy-Tzedek, M. Ben Tov, A. Karniel

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


In everyday life, we frequently alternate between performing discrete and rhythmic movements. When performing a periodic movement, two distinct movement types can be distinguished: highly harmonic vs. discrete-like. The harmonicity of the movement is used to classify it as one or the other. We asked: (1) whether the frequency at which a periodic movement is performed affects the harmonicity of the resultant movement; and (2) what underlies switching between these movement types. To answer these questions, we studied horizontal flexion/extension forearm movements in 13 young adults over a wide range of frequencies. Movements were performed either at a fixed frequency, or at gradually increasing or decreasing target frequencies. We found movement harmonicity to depend on the frequency of the movement. Furthermore, we found a reverse hysteresis behavior, where participants switched movement type in anticipation of the future-required frequency. These findings suggest that predictive control is employed in switching between movement types.

Original languageEnglish
Pages (from-to)283-288
Number of pages6
JournalBrain Research Bulletin
Issue number5
StatePublished - 30 Jun 2011


  • Enhanced contrast
  • Motor control
  • Multistability
  • Predictive control
  • Reverse hysteresis
  • Transition

ASJC Scopus subject areas

  • Neuroscience (all)


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