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Response preparation and execution during intentional bimanual pattern switching.

Dana Maslovat1, Michael J Carter2, Anthony N Carlsen3

  • 1School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada.

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|June 30, 2017
PubMed
Summary
This summary is machine-generated.

Researchers used startling acoustic stimuli to study how people prepare and switch between bimanual coordination patterns. Results show that startling stimuli speed up switching and reveal that movement cycle timing influences coordination pattern transitions.

Keywords:
coordination dynamicsintentional switchingpreparationstartletransitions

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Area of Science:

  • Motor control and learning
  • Human kinetics and biomechanics
  • Neuroscience of movement

Background:

  • Stable in-phase (IP) and anti-phase (AP) bimanual coordination patterns exist without practice.
  • Intentional switching between these patterns reveals interactions between volition and intrinsic dynamics.
  • Investigating switching preparation and execution is key to understanding motor control.

Purpose of the Study:

  • To examine the preparation and execution processes of switching between bimanual coordination patterns.
  • To utilize a startling acoustic stimulus (SAS) to probe advance preparation of the switch response.
  • To determine the effect of SAS on reaction time and switching time.

Main Methods:

  • Participants performed cyclical bimanual elbow movements in IP and AP patterns.
  • An auditory switch cue, either nonstartling or a SAS, prompted pattern switching.
  • Reaction time to the switch cue and switching time were measured.

Main Results:

  • Reaction time to the switch stimulus was significantly reduced on startle trials, indicating advance preparation.
  • Switching time was reduced on startle trials due to increased neural activation from the SAS.
  • Switching time was shorter for AP to IP transitions, influenced by the stimulus timing within the movement cycle.

Conclusions:

  • The switching response between bimanual coordination patterns is prepared in advance.
  • A SAS accelerates the execution of intentional switches between coordination patterns.
  • Switching dynamics are influenced by the specific movement cycle phase at the time of the stimulus.