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

Publication date: Available online 30 April 2017
Source:Archives of Physical Medicine and Rehabilitation
Author(s): Margaret Finley, David Ebaugh
ObjectiveTo assess the relationship of pectoralis minor muscle (PMm) length and extensibility to shoulder pain, shoulder girdle motion, and duration of manual wheelchair (MWC) use and compare differences in muscle length, muscle extensibility, peak humeral elevation and pain among groups based on duration of wheelchair use.DesignCross-sectional cohort study;SettingLaboratory settingParticipantsTwenty-two individuals with SCI who used a MWC for daily community and home mobility (18 males, mean age 41.7 years, duration wheelchair use = 14.6 years). Participants were stratified into groups based on duration of wheelchair use: < 5 years (n=6), 5-15 years (n=8), >15 years (n=8).InterventionsNot applicable;Main Outcome Measure(s)Clinical measures of PMm length and extensibility, shoulder girdle motion, and shoulder pain (Wheelchair Users Shoulder Pain Index).ResultsSignificant, 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 have reduced PMm extensibility and reduced peak humerothoracic elevation compared to those with < 5 years duration of use.ConclusionsThis 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.



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