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Related Experiment Video

Updated: Jan 25, 2026

Experimental Methods to Study Human Postural Control
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Positive verbal suggestion optimizes postural control.

Bernardo Villa-Sánchez1, Mehran Emadi Andani1, Giulia Menegaldo1

  • 1Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.

Scientific Reports
|April 25, 2019
PubMed
Summary

The placebo effect can improve balance control. Healthy volunteers showed better stability and perceived greater stability after a placebo intervention, suggesting a potential benefit for individuals with balance issues.

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Area of Science:

  • Neuroscience
  • Human Physiology
  • Psychology

Background:

  • Maintaining balance is crucial for daily activities and fall prevention.
  • The influence of psychological factors, such as the placebo effect, on motor control is an area of growing interest.
  • Previous research has explored placebo effects in various contexts, but its impact on postural control requires further investigation.

Purpose of the Study:

  • To investigate if a placebo procedure, using verbal suggestion, can enhance balance control in healthy individuals.
  • To assess the effects of a placebo intervention on objective measures of body sway and subjective perception of stability.
  • To explore the potential translational impact of placebo-induced balance improvements in clinical populations.

Main Methods:

  • Thirty healthy volunteers were randomized into placebo and control groups.
  • Participants performed a single-leg stance task across three sessions (T0, T1, T2).
  • An inert treatment was applied to the leg, with the placebo group believing it improved balance, while the control group was informed it was inert. Body sway was measured using an accelerometer, and subjective stability was recorded.

Main Results:

  • The placebo group exhibited significantly reduced body sway compared to the control group at T2, particularly in the three-dimensional and anterior-posterior directions.
  • Participants in the placebo group reported a greater perception of stability than those in the control group.
  • These findings indicate that the placebo effect can objectively and subjectively enhance postural control.

Conclusions:

  • The placebo effect can optimize posture and improve balance control in healthy individuals.
  • Verbal suggestion, as a placebo intervention, demonstrates a tangible impact on motor performance related to balance.
  • This study provides initial evidence for the potential of placebo interventions in managing postural and gait disturbances in clinical settings.