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Postural control in children. Coupling to dynamic somatosensory information

José A Barela1, John J Jeka, Jane E Clark

  • 1Department of Kinesiology, University of Maryland, College Park, USA.

Experimental Brain Research
|May 10, 2003
PubMed

Insights

Children

Area of Science:

  • Motor Control
  • Human Development
  • Somatosensory System

Background:

  • Postural control relies on integrating sensory information.
  • The development of sensory-motor coupling in children is not fully understood.
  • Dynamic somatosensory input influences body sway.

Purpose of the Study:

  • To compare the coupling between dynamic somatosensory information and body sway in children and adults.
  • To investigate age-related differences in sensory-motor integration during postural tasks.

Main Methods:

  • Participants (children aged 4, 6, 8 years, and adults) stood upright and lightly touched a moving plate.
  • The plate oscillated rhythmically at frequencies of 0.2, 0.5, and 0.8 Hz.
  • Postural sway was measured to analyze the frequency response to somatosensory stimuli.

Main Results:

  • Children exhibited a broadband frequency response to somatosensory stimuli, unlike adults' focused response at the driving frequency.
  • Postural sway variability was greater in children than adults.
  • 4-year-olds showed weaker coupling to positional sensory information compared to older children and adults.

Conclusions:

  • Children aged 6 and older demonstrate developed sensory-motor coupling, but it is less frequency-focused than in adults.
  • Children may struggle to filter irrelevant sensory information, leading to broader sway responses.
  • Increased sway variability in children may stem from immature internal models of body orientation rather than sensory feedback issues.

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