Stabilizing posture through imagery

Area of Science:

• Neuroscience
• Human Physiology
• Psychophysics

Background:

• Vision suppression increases body sway (center of pressure velocity).
• Fingertip touch reduces center of pressure displacement in blindfolded individuals.
• Hypnotizability is a factor in sensory processing and motor control.

Purpose of the Study:

• To investigate if imagined visual and tactile stimuli differentially stabilize posture.
• To compare these effects between individuals with high and low hypnotizability.

Main Methods:

• Assessed posture using center of pressure (CoP) measures.
• Utilized imagined visual fixation and fingertip touch.
• Compared effects in high (highs) and low (lows) hypnotizable groups.

Main Results:

• Imagined visual and tactile stimuli were ineffective in low hypnotizable individuals.
• In high hypnotizable individuals, real tactile stimulation affected velocity, but imagery effects were inconclusive.
• High hypnotizable individuals exhibited greater postural variability, complicating imagery effect assessment.

Conclusions:

• Hypnotizability significantly modulates postural responses to sensory manipulation.
• Visual and tactile imagery are less effective for posture stabilization than real stimuli.
• Greater variability in high hypnotizable individuals is a key factor influencing postural control outcomes.