How Does the Central Nervous System Control Forthcoming Movement with Different Emotional Stimuli?

Area of Science:

• Human motor control
• Neuroscience
• Biomechanics

Background:

• Postural balance is crucial for human motor skills.
• Emotional stimuli can influence motor control.
• Understanding the interplay between emotion and movement direction is vital for assessing postural stability.

Purpose of the Study:

• To quantify the effect of emotional stimuli on postural control.
• To investigate how movement direction interacts with emotional influence on balance.
• To analyze anticipatory postural adjustments during movement initiation under emotional conditions.

Main Methods:

• Eighteen women performed forward, backward, or static stances after viewing emotional stimuli (positive, negative, neutral).
• Center of Pressure (COP) parameters, including 2D velocity, ML, and AP amplitude, were recorded.
• Analysis focused on the interaction between movement direction and emotional valence on postural control metrics.

Main Results:

• A significant motion * direction effect was found on 2D velocity, decreasing with emotional stimuli and static stances.
• Medio-lateral (ML) amplitude was reduced by emotional presence, while antero-posterior (AP) amplitude varied with direction and emotional context.
• Anticipatory postural adjustments were observed, with reduced oscillation during movement planning and increased oscillation in the emotion window.

Conclusions:

• Postural control is dynamically influenced by both the direction of intended movement and the valence of emotional stimuli.
• Emotional content and movement direction interact, affecting planning and programming of forthcoming movements.
• This research offers insights into the complex relationship between emotion, movement direction, and human postural stability.