The spectral content of postural sway during quiet stance: influences of age, vision and somatosensory inputs

Details

• Personal Author:
  Madigan ML ; Nussbaum MA ; Singh NB ; Taylor WR
• Description:
  Maintenance of human upright stance requires the acquisition and integration of sensory inputs. Conventional measures of sway have had success in identifying age- and some disease-related changes, but remain unable to address the complexities and dynamics associated with postural control. We investigated the effects of vision, surface compliance, age, and gender on the spectral content of center of pressure (COP) time series. Sixteen healthy young (age 18-24) and older participants (age 55-65) performed trials of quiet, upright stance under different vision (eyes open vs. closed) and surface (hard vs. compliant) conditions. Spectral analyses were conducted to describe COP mean normalized power in discretized bands. Effects of the two sensory modalities and age were distinct in the antero-posterior and medio-lateral directions, and a reorganization of spectral content was evident with increasing task difficulty (eyes open vs. closed and hard vs. compliant surface) and among older adults. These results indicate that vision and surface compliance are predominantly associated with responses from musculature associated with antero-posterior and medio-lateral directions of sway, respectively. Finally, distinguishing between the contributions of different afferent systems to the postural control system using the spectral content of sway bi-directionally may help in diagnosing individuals with balance impairments. [Description provided by NIOSH]
• Subjects:
  Age Factors Aging Electrophysiology Eye Men Musculoskeletal System Occupational Health Safety Sense Organs Spectrum Analysis Women

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• Keywords:
  Age-factors Age-groups Author Keywords: Postural Control Balance Impairments Biomechanics In Aging Body-mechanics Electrophysiological-measurements Kinesiology Muscle-contraction Muscle-function Musculoskeletal-system Performance-capability Physiological-function Physiological-testing Posture Sensory-motor-system Sensory-perceptual-processes Sensory Feedback Spectral Analysis Spectrographic-analysis System Complexity Visual-motor-performance

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• ISSN:
  1050-6411
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  131-136
• Volume:
  22
• Issue:
  1
• NIOSHTIC Number:
  nn:20040760
• Citation:
  J Electromyogr Kinesiol 2012 Feb; 22(1):131-136
• Contact Point Address:
  Maury A. Nussbaum, Industrial and Systems Engineering, Virginia Tech, 250 Durham Hall (0118), Blacksburg, VA 24061, USA
• Email:
  nussbaum@vt.edu
• Federal Fiscal Year:
  2012
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  True
• Start Date:
  20000930
• Source Full Name:
  Journal of Electromyography and Kinesiology
• End Date:
  20040929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f5f0cf19428091e780f4d364b36ca18667f03f0d7a4099077e6e8e01eb7234abaeea609909c21c756a79ec753920d6af6d2b924922bda7d2f64427ba1caa82d5
• Download URL:
  https://stacks.cdc.gov/view/cdc/193513/cdc_193513_DS1.pdf
• File Type:
  [PDF - 645.31 KB ]