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Related Experiment Video

Updated: Feb 7, 2026

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum
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Do postural constraints affect eye, head, and arm coordination?

Alexander Stamenkovic1,2, Paul J Stapley1,2, Rebecca Robins3

  • 1Neural Control of Movement Laboratory School of Medicine, Faculty of Science, Medicine and Health University of Wollongong , Wollongong , Australia.

Journal of Neurophysiology
|July 19, 2018
PubMed
Summary

The central nervous system prioritizes gaze stability during reaching tasks, integrating postural control to maintain coordinated eye, head, and arm movements across various body postures. This whole body gaze strategy ensures successful task completion despite balance challenges.

Keywords:
balanceeye, head, and arm coordinationposturereachvisuomotor

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Motor Control

Background:

  • Visuomotor and postural control are coupled during whole body movements.
  • The influence of postural constraints on the interaction between gaze and reaching is not fully understood.
  • Central nervous system (CNS) prioritization of gaze control during challenging postures requires investigation.

Purpose of the Study:

  • To investigate how altered equilibrium constraints affect the initiation of eye, head, and arm movements.
  • To determine if the CNS prioritizes gaze control over postural adjustments during reaching tasks.
  • To understand the CNS's strategy for integrating visuomotor and postural components under varying postural demands.

Main Methods:

  • Participants performed isolated gaze shifts and whole body reaching movements to visual targets.
  • Eye-head metrics and segmental kinematics were quantified.
  • Four postural configurations were compared: seated, natural stance, narrow stance, and balancing on a beam.

Main Results:

  • Despite kinematic differences across postures, eye-head metrics and movement initiation timing remained largely unchanged.
  • Gaze accuracy was maintained across all tested postural configurations.
  • No distinct changes in eye characteristics or movement sequence were observed, suggesting a unified motor strategy.

Conclusions:

  • The CNS employs a whole body gaze strategy, prioritizing gaze stability by integrating postural control.
  • Postural control appears subservient to gaze stability requirements during reaching tasks.
  • This integrated strategy allows for the successful execution of both gaze and reaching goals, regardless of postural complexity.