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Spatial Cues Provided by Sound Improve Postural Stabilization: Evidence of a Spatial Auditory Map?
Lennie Gandemer1, Gaetan Parseihian1, Richard Kronland-Martinet1
1Aix Marseille Univ, CNRS, Perception, Representations, Image, Sound, Music (PRISM)Marseille, France.
Frontiers in Neuroscience
|July 12, 2017
Summary
Sound spatial cues enhance postural stability. Richer auditory environments improve balance by creating a "spatial hearing map," aiding in postural control.
Area of Science:
- Auditory Neuroscience
- Human Motor Control
- Sensory Integration
Background:
- Sound's role in postural control is suggested but under-explored.
- Audition's impact on posture requires investigation into specific sound attributes.
Purpose of the Study:
- To determine how auditory spatial cues influence postural sway.
- To investigate the effect of auditory environment richness on postural stability.
Main Methods:
- Blindfolded young healthy subjects underwent two experiments with varied auditory environments and support surfaces.
- Experiment 1: compared sway in normal vs. anechoic rooms with static sound sources.
- Experiment 2: explored enriched auditory environments (ambisonics) and foam vs. normal surfaces.
Main Results:
- Spatial cues from sound significantly improve postural stability.
- Increased richness of the auditory environment led to better postural stabilization.
- Subjects demonstrated enhanced balance with more complex soundscapes.
Conclusions:
- Auditory spatial information is a valuable resource for postural control.
- The 'spatial hearing map' theory explains how mental environmental representations aid balance.
- Soundscape design could potentially be used to enhance human postural stability.
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