Personality traits and individual differences predict threat-induced changes in postural control | JoVE Visualize

Area of Science:

Human motor control
Applied psychology
Biomechanics

Background:

Postural control is crucial for maintaining stability, especially in challenging environments.
Individual differences in personality and movement perception may affect balance responses.
Height-induced postural threat is a common scenario eliciting significant physiological and behavioral changes.

Purpose of the Study:

To investigate the predictive power of personality traits and individual differences on postural control adjustments under height threat.
To examine how trait anxiety, movement reinvestment, physical risk-taking, and height experience influence static and anticipatory postural control.
To explore potential mediating factors, such as fear of falling and arousal, in the relationship between risk-taking and postural control.

Main Methods:

Eighty-two healthy young adults participated.
Questionnaires assessed trait anxiety, trait movement reinvestment (conscious motor processing, movement self-consciousness), physical risk-taking, and height experience.
Static and anticipatory postural control were measured under low and high postural threat (height) conditions.

Main Results:

Personality traits significantly predicted changes in static postural control, but not anticipatory postural control, under height threat.
Lower physical risk-taking correlated with leaning further from the edge and increased sway frequency/decreased amplitude.
Higher conscious motor processing was linked to leaning further from the edge and larger sway amplitudes; higher movement self-consciousness related to smaller sway amplitudes.

Conclusions:

Specific personality traits, particularly physical risk-taking and aspects of movement reinvestment, modulate static postural control responses to height-induced threats.
The observed relationships between physical risk-taking and postural control changes are mediated by fear of falling and physiological arousal.
Findings suggest potential avenues for balance assessment and therapeutic interventions, though further research in clinical populations is warranted.