Translations of the humerus in persons with shoulder impingement symptoms

Details

• Personal Author:
  Cook TM ; Ludewig PM
• Description:
  STUDY DESIGN: Two-group mixed-model analysis of covariance and correlation analysis. OBJECTIVES: To determine whether differences in humeral translations exist between patients with shoulder impingement symptoms and an asymptomatic comparison group, and if so, to determine if shoulder range-of-motion (ROM) measures are associated with abnormal translations. BACKGROUND: Abnormal translations of the humeral head are believed to reduce the available subacromial space and to contribute to the development or progression of shoulder impingement symptoms. These abnormal translations have also been theorized to be related to tightness of the posterior capsule and decreased shoulder ROM. METHODS AND MEASURES: Three-dimensional humeral translations were tracked in symptomatic construction workers and an asymptomatic comparison group while elevating the arm in the scapular plane under no-load, 2.3-kg, and 4.6-kg hand-load conditions. Between-group comparisons were made across 3 phases of motion (30 degrees-60 degrees, 60 degrees-90 degrees, and 90 degrees-120 degrees) and the association between humeral translations and cross-body adduction and shoulder internal rotation ROM measures were determined by Pearson correlation analysis. RESULTS: Persons with shoulder symptoms demonstrated small but significant changes in anterior-posterior translations of the humerus. These changes for the 90 degrees-120 degrees phase of humeral elevation were moderately negatively associated with available cross-body adduction ROM. CONCLUSIONS: The identified kinematic deviations are consistent with possible reductions of the subacromial space. Further study of relationships between posterior capsule tightness, rotator cuff function, and abnormal humeral translations is warranted to better delineate underlying kinematic mechanisms that may contribute to shoulder impingement symptoms and to refine rehabilitation techniques. [Description provided by NIOSH]
• Subjects:
  Aging Biomechanical Phenomena Construction Industry Electrophysiology Men Occupational Health Safety
• Keywords:
  Age-groups Analytical-instruments Analytical-models Biomechanics Body-mechanics Body-regions Construction-workers Electrophysiological-measurements Humans Injuries Kinesiology Motion-studies Physical-therapy Physiological-effects Physiological-function Physiological-measurements Physiopathology

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• ISSN:
  0190-6011
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  Maryland ; Minnesota ; OSHA Region 3 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  248-259
• Volume:
  32
• Issue:
  6
• NIOSHTIC Number:
  nn:20041047
• Citation:
  J Orthop Sports Phys Ther 2002 Jun; 32(6):248-259
• Contact Point Address:
  Paula M. Ludewig, Department of Physical Medicine and Rehabilitation, The University of Minnesota, MMC 388, 420 Delaware Street, Minneapolis, MN 55455, USA
• Email:
  ludew001@umn.edu
• Federal Fiscal Year:
  2002
• NORA Priority Area:
  Construction
• Performing Organization:
  The Center to Protect Workers' Rights
• Peer Reviewed:
  True
• Start Date:
  19990930
• Source Full Name:
  Journal of Orthopaedic and Sports Physical Therapy
• End Date:
  20050630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9083ad6dab7cf8c18b1962c1c3c57e9642b59155a8f39468547c034c0eaacbb4ccc63bbb8904787b1d0cf76cee703bfc40d24d167d5c8e232e51b2e1f86a7398
• Download URL:
  https://stacks.cdc.gov/view/cdc/193710/cdc_193710_DS1.pdf
• File Type:
  [PDF - 102.64 KB ]