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Simulated motion negatively affects motor task but not neuromuscular performance.

Gregory E P Pearcey1, Scott N MacKinnon1,2, Duane C Button1,3

  • 1a School of Human Kinetics and Recreation, Memorial University of Newfoundland , St. John's , NL , Canada A1C 5S7.

Ergonomics
|March 27, 2015
PubMed
Summary

Simulated motion impairs motor task performance, increasing attention demands but not affecting neuromuscular function. Recovery from these effects is not detailed.

Keywords:
maximal voluntary contractionmotionreaction timevisuomotor accuracy trackingvoluntary activation

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Area of Science:

  • Human physiology
  • Motor control
  • Applied kinesiology

Background:

  • Ship motion can negatively impact seafarer performance, potentially leading to critical errors.
  • Understanding the effects of motion on motor tasks and recovery is crucial for maritime safety.

Purpose of the Study:

  • To investigate the impact of simulated motion on motor task and neuromuscular performance over one hour.
  • To determine the recovery time course following motion-induced decrements.

Main Methods:

  • Participants performed motor tasks including reaction time and visuomotor tracking.
  • Neuromuscular assessments included maximal voluntary contractions and evoked contractile properties.
  • Biceps brachii electromyography (EMG) was used to measure muscle activity.

Main Results:

  • Reaction time and visuomotor tracking accuracy were significantly impaired during simulated motion.
  • Maximal voluntary contractions, voluntary activation, and evoked contractile properties remained unaffected.
  • Root mean square EMG (rmsEMG) of the biceps brachii showed no significant changes.

Conclusions:

  • Simulated motion increases attention demands, primarily affecting motor task execution rather than neuromuscular capacity.
  • These findings highlight the cognitive load associated with performing tasks in motion environments.
  • Results can inform the development of training and safety protocols for maritime professionals.