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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
06:58

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Published on: November 6, 2015

Programming sequences of hand postures.

D L Harrington1, K York Haaland

  • 1a Veterans Administration Medical Center and the Departments of Psychology, Neurology, and Psychiatry , University of New Mexico.

Journal of Motor Behavior
|August 16, 2013
PubMed
Summary
This summary is machine-generated.

Complex motor skills involve preprogramming sequences of movements. This study found that while the first two responses in a sequence are preprogrammed, subsequent movements are planned during execution, impacting reaction time.

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Area of Science:

  • Motor control
  • Cognitive psychology
  • Human movement science

Background:

  • Understanding the preprogramming of complex motor skills is crucial in motor control research.
  • A key debate centers on whether entire movement sequences or only initial components are planned before action initiation.

Purpose of the Study:

  • To investigate a model where only the first response in a sequence is preprogrammed before movement.
  • To examine how sequence length, response variability, and transition types affect reaction time (RT) in motor programming.

Main Methods:

  • Utilized a simple reaction time paradigm with participants executing sequences of hand postures.
  • Manipulated sequence length, number of distinct postures, and posture transition types across experiments.
  • Analyzed reaction times and interresponse times to infer preprogramming of sequential movements.

Main Results:

  • Sequence length had minimal effect on RT for repeated hand postures (2-5 responses).
  • RT was influenced by hand posture type beyond the first response when postures were distinct.
  • Interresponse time analysis indicated the first two responses were fully preprogrammed.

Conclusions:

  • Results support a hierarchical model of motor programming.
  • Suggests that some, but not all, information for sequential movements is preprogrammed before execution.
  • Highlights the dynamic interplay between preprogramming and online adjustments in complex skill execution.