The Role of Multisensory Integration in Postural Stability Regulation among 5- to 7-Year-Old Children

Area of Science:

• Developmental neuroscience
• Human motor control
• Sensory integration

Background:

• Postural control in preschool children integrates visual, proprioceptive, and vestibular inputs.
• The hierarchical contribution of multisensory integration, especially tactile feedback, is not well understood.
• Developmental trajectories of sensory weighting strategies in early childhood require further investigation.

Purpose of the Study:

• To investigate the developmental trajectory of sensory weighting strategies in preschool children.
• To determine the hierarchical contribution of visual, proprioceptive, vestibular, and tactile inputs to postural control.
• To elucidate the role of tactile feedback in multisensory integration for balance.

Main Methods:

• 128 preschool children were randomly selected from a kindergarten.
• Sensors measured the angular velocity modulus (ω) of the body centre of mass under eight sensory integration conditions.
• Paired-samples t-test and repeated-measures ANOVA analyzed differences in ω across sensory integrations.

Main Results:

• Vestibular integration with proprioception showed smaller sway (ω) than with visual or tactile senses (P < 0.001).
• Proprioceptive integration consistently reduced postural sway, with vestibular-proprioceptive coupling being most effective.
• Tactile input enhanced stability only when visual and proprioceptive cues were absent, indicating a compensatory role.

Conclusions:

• Proprioception plays a crucial role in stabilizing posture for preschool children.
• Vestibular-proprioceptive integration offers the strongest postural stability, followed by visual integration.
• Tactile feedback serves a compensatory function in sensory-deprived situations during early childhood development.