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Related Experiment Videos

End posture selection in manual positioning: evidence for feedforward modeling based on a movement choice method.

Catherine L Elsinger1, David A Rosenbaum

  • 1Department of Neurology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.

Experimental Brain Research
|August 5, 2003
PubMed
Summary

Movement planning involves selecting end postures before physical action. This study suggests the brain simulates movements internally to choose the easiest posture, aiding motor planning research.

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Area of Science:

  • Motor control and cognitive neuroscience
  • Human movement science
  • Robotics and human-computer interaction

Background:

  • End-point postures in human movements are influenced by initial positions and movement trajectories.
  • The precise timing of end-posture selection relative to movement initiation remains unclear.
  • Internal simulation of movements may play a role in motor planning.

Purpose of the Study:

  • To test the hypothesis that end postures for positioning movements are selected before movements begin.
  • To investigate whether movements are internally simulated and end-postures selected prior to overt movement.
  • To explore the role of feedforward modeling in motor planning.

Main Methods:

  • A movement choice paradigm was employed.

Related Experiment Videos

  • Participants selected between two presented end postures by initiating a movement.
  • Obstacles were introduced to manipulate movement trajectories and assess their influence.

    • Main Results:

    • End-posture selection was significantly influenced by starting positions.
    • Movement characteristics, including those affected by obstacles, impacted end-posture choices.
    • Results support the idea that prospective movements are internally simulated before execution.

    Conclusions:

    • End postures for voluntary movements are selected proactively, prior to overt action.
    • Feedforward modeling of prospective movements is likely utilized during end-posture selection.
    • The movement choice method is a promising tool for studying motor planning and internal simulation.