Visual feedback adaptation enhances arm-posture coordination during floor-surface perturbations.

Area of Science:

• Biomechanics
• Motor Control
• Human Physiology

Background:

• Postural stability relies on sensorimotor and interjoint coordination during perturbations.
• Investigating feedback modalities is crucial for understanding postural adaptation.

Purpose of the Study:

• To compare the effects of knowledge of results (KR) and continuous visual feedback on postural adaptation.
• To assess changes in endpoint position variability, margin of stability (MOS), and interjoint coordination.

Main Methods:

• Nineteen healthy young adults underwent a backward-translating force platform task.
• Adaptation training involved KR and continuous visual feedback phases.
• Key parameters measured included center of pressure (COP), center of mass (COM), MOS, and interjoint coordination.

Main Results:

• Continuous visual feedback significantly reduced endpoint position variability and improved MOS.
• It also increased anticipatory COP displacement and shortened time to stability.
• Enhanced elbow-ankle interjoint coordination was observed with visual feedback.

Conclusions:

• Continuous visual feedback effectively enhances arm-posture coordination during external perturbations.
• This feedback modality shows potential for improving balance control in healthy young adults.