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Functional Synergy Between Postural and Visual Behaviors When Performing a Difficult Precise Visual Task in Upright

Cédrick T Bonnet1, Sébastien Szaffarczyk1, Stéphane Baudry2

  • 1Laboratoire de Sciences Cognitives et Affectives, University of Lille, CNRS.

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Summary

Precise visual tasks, like searching images, enhance postural stability by creating functional synergies between visual and postural brain processes. This suggests attention boosts coordination, contrary to traditional cognitive models.

Keywords:
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Area of Science:

  • Neuroscience
  • Human Motor Control
  • Cognitive Psychology

Background:

  • Existing cognitive models suggest attention-demanding tasks impair postural stability due to resource competition.
  • Previous research indicates greater postural stability during precise visual tasks compared to stationary ones.

Purpose of the Study:

  • To investigate the hypothesis that attentional resources increase to create visual-postural synergies during demanding visual tasks.
  • To challenge existing cognitive models by exploring the interplay between visual attention and postural control.

Main Methods:

  • A difficult visual searching task and a control free-viewing task were employed with 16 young participants.
  • Body displacements (linear, angular) and cognitive workload were measured during both tasks.
  • Partial correlations were used to analyze the relationship between visual-postural synergies and cognitive workload.

Main Results:

  • Participants showed significantly lower body displacements and higher cognitive workload during the searching task compared to free-viewing.
  • Functional synergies between visual and postural processes were observed in the searching task, characterized by reduced head and neck displacements.
  • These synergies were linked to attentional demand and diminished when cognitive workload was controlled.

Conclusions:

  • Attentional resources can enhance coordination between visual and postural systems, leading to improved stability during precise visual tasks.
  • A novel cognitive model is proposed to explain the cognitively grounded, functional nature of vision-posture synergies.
  • The findings challenge existing cognitive models and suggest a neuroscientific basis for vision-posture integration.