Frequency analysis approach to study balance control in individuals with multiple sclerosis.

摘要: Abstract Background The ability to control balance is often compromised in people with multiple sclerosis (MS) and considered be a strong contributing factor toward their increased risk of falls. New method aim the study was demonstrate that frequency analysis postural sway could used investigate MS. Ten individuals MS ten age-and-gender matched healthy subjects stood on force platform eyes open or closed. displacements center pressure (COP) were calculate power spectrum using fast Fourier transform. Power analyzed for anterior-posterior (AP) medial-lateral (ML) directions three bands: 0–0.3 Hz, 0.3–1 Hz, 1–3 Hz reflecting contributions from visual, vestibular/somatosensory, proprioceptive systems, respectively. Results mean COP velocity closed condition significantly larger than group. Additionally, group showed significant decrease magnitude low band pattern increase medium high bands medial–lateral direction. Conclusion observed redistribution when vision absent indicates relied more vestibular/somatosensory systems. However, such strategy change ineffective maintaining stability, thus highlighting impaired somatosensory system regulation outcome suggests identifying possible sources impairment