Postural balance in frequent lucid dreamers: a replication attempt

Area of Science:

• Neuroscience
• Psychology
• Sleep Science

Background:

• Early research indicates a connection between the vestibular system and lucid dreaming.
• Frequent lucid dreamers tend to perform better on static balance tasks.
• Gravity-themed dreams, like flying, are often associated with lucid dreaming, but studies are limited.

Purpose of the Study:

• To replicate previous findings on the vestibular system's role in lucid dreaming using sensitive balance measures.
• To investigate the relationship between lucid dreaming and general gravity imagery in dreams.
• To explore sex-specific differences in the association between balance, dream content, and lucid dreaming.

Main Methods:

• 131 participants reported lucid dreaming frequency and completed a 5-day dream log assessing lucidity, control, and gravity sensations (flying, falling).
• Participants underwent static balance tasks on a force plate, measuring center of pressure (CoP) displacement and velocity.
• Postural stability was assessed via CoP metrics during various standing conditions (one/both feet, eyes open/closed).

Main Results:

• Frequent lucid dreamers exhibited improved balance (lower CoP Velocity) on certain trials, partially supporting previous findings.
• Lucid dreaming frequency correlated with better overall balance (lower CoP Velocity).
• Lower CoP Velocity was linked to flying sensations in men's dreams and increased dream control in women's dreams, though confounded by body height and sleepiness.

Conclusions:

• The findings partially replicate and support the role of the vestibular system in lucid dreaming.
• Vestibular system involvement suggests a contribution to fundamental aspects of self-consciousness, including self-agency and self-location.
• These self-consciousness attributes may be relevant during both wakefulness and dreaming states.