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Association of Pectoralis Minor Muscle Extensibility, Shoulder Mobility, and Duration of Manual Wheelchair Use

  • Margaret A. Finley
    Correspondence
    Corresponding author Margaret A. Finley, PT, PhD, Department of Physical Therapy & Rehabilitation Science, Drexel University, Three Parkway Building, 1601 Cherry St, Mail Stop 7-502, Office 763, Philadelphia, PA 19102.
    Affiliations
    Department of Physical Therapy and Rehabilitation Science, Drexel University, Philadelphia, PA
    Search for articles by this author
  • David Ebaugh
    Affiliations
    Department of Physical Therapy and Rehabilitation Science, Drexel University, Philadelphia, PA

    Department of Health Sciences, Drexel University, Philadelphia, PA
    Search for articles by this author
Published:April 29, 2017DOI:https://doi.org/10.1016/j.apmr.2017.03.029

      Abstract

      Objective

      To assess the relation of pectoralis minor muscle (PMm) length and extensibility to shoulder pain, shoulder girdle motion, and duration of manual wheelchair (MWC) use, and to compare differences in muscle length, muscle extensibility, peak humeral elevation, and pain among groups based on duration of wheelchair use.

      Design

      Cross-sectional cohort study.

      Setting

      Laboratory setting.

      Participants

      Individuals with spinal cord injury (SCI) who used an MWC for daily community and home mobility (N=22; 18 men; mean age, 41.7y; duration wheelchair use, 14.6y). Participants were stratified into groups based on duration of wheelchair use: <5 years (n=6), 5 to 15 years (n=8), and >15 years (n=8).

      Interventions

      Not applicable.

      Main Outcome Measures

      Clinical measures of PMm length and extensibility, shoulder girdle motion, and shoulder pain (Wheelchair User's Shoulder Pain Index).

      Results

      Significant high correlations were found among duration of wheelchair use, passive PMm length, passive PMm extensibility, and peak humerothoracic elevation. Moderate correlation of peak humerothoracic elevation to pain was found. Individuals with >15 years wheelchair use had reduced PMm extensibility and reduced peak humerothoracic elevation than those with <5 years duration of use.

      Conclusions

      To our knowledge, this is the first investigation to identify the association of reduced PMm extensibility with reduced shoulder girdle mobility, pain, and duration of wheelchair use in individuals with SCI.

      Keywords

      List of abbreviations:

      BMI (body mass index), ICC (intraclass correlation coefficient), MWC (manual wheelchair), PMm (pectoralis minor muscle), SCI (spinal cord injury), WUSPI (Wheelchair User's Shoulder Pain Index)
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