Jul 14, 2009

The role and interaction of visual and auditory afferents in postural stability

Gait & Posture
Hans-Georg PalmBenedikt Friemert

Abstract

Maintaining balance requires the integration of vestibular, proprioceptive and visual information and the translation of this input into appropriate motor responses. Although the role of the visual system has been widely investigated, there are no studies addressing the influence of non-specific distracting auditory inputs on postural stability. To analyze the role of the visual and auditory systems in the maintenance of postural stability and to assess potential interaction between the two sensory systems. Twenty-three healthy subjects were examined by computerized dynamic posturography. Stability index scores were calculated under each of six conditions: three visual conditions (sway feedback, eyes open without feedback, eyes closed) were combined with two auditory conditions (exposure or no exposure to non-specific auditory input). Analysis of variance (ANOVA) was used to test for differences among groups in the six test conditions. Postural stability was much poorer in the eyes-closed (overall stability index (OSI): 6.8+/-2.1 degrees) than in the eyes-open condition (OSI: 2.2+/-1.2 degrees). Balance control significantly improved with visual feedback (OSI: 1.2+/-0.5 degrees). Exposure to non-specific auditory input (music t...Continue Reading

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References

Mentioned in this Paper

Neuro-Oncological Ventral Antigen 2
Visual System
Visual Perception
Biological Feedback
Entire Central Nervous System
Postural Balance
Ablepharon
Subcortical Sensory Systems
Posture brand of calcium phosphate, tribasic
Tilt (brand of fungicide)

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