Influences of the perception of self-motion on postural parameters

Area of Science:

• Neuroscience
• Human Movement Science
• Virtual Reality

Background:

• The perception of self-motion is crucial for maintaining balance and spatial orientation.
• Virtual environments offer controlled settings to study sensory integration and motor responses.

Purpose of the Study:

• To investigate how visual motion perception influences head and body posture in young adults.
• To explore the role of visual, vestibular, and somatosensory inputs in postural control during self-motion perception.
• To assess the potential of visual stimuli as a therapeutic tool for postural and spatial orientation deficits.

Main Methods:

• Participants stood in a Cave Automatic Virtual Environment (CAVE) and experienced constant velocity visual motion.
• Head and whole-body orientation, center of pressure (COP) from a force plate, and self-motion perception via a hand-held wand were recorded.
• Analysis focused on the influence of visual motion's plane and complexity on postural kinematics.

Main Results:

• The impact of perceived self-motion on postural control varied with the plane and complexity of visual motion.
• Postural responses integrated visual, vestibular, and somatosensory information, indicating complex cortical processing.
• Individual differences in visual sensitivity influenced the degree of postural sway.

Conclusions:

• Perception of self-motion significantly modulates postural control and spatial orientation.
• Ascending and descending neural controls modify spatial representations during perceived motion.
• Visual motion stimulation holds therapeutic potential for individuals with impaired posture and spatial orientation, particularly those with central nervous system (CNS) damage.