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Immediate Effects of Mirror Therapy in Patients With Shoulder Pain and Decreased Range of Motion

      Abstract

      Objective

      To determine the effects of a brief single component of the graded motor imagery (GMI) sequence (mirror therapy) on active range of motion (AROM), pain, fear avoidance, and pain catastrophization in patients with shoulder pain.

      Design

      Single-blind case series.

      Setting

      Three outpatient physical therapy clinics.

      Participants

      Patients with shoulder pain and limited AROM (N=69).

      Intervention

      Patients moved their unaffected shoulder through comfortable AROM in front of a mirror so that it appeared that they were moving their affected shoulder.

      Main Outcome Measures

      We measured pain, pain catastrophization, fear avoidance, and AROM in 69 consecutive patients with shoulder pain and limited AROM before and immediately after mirror therapy.

      Results

      There were significant differences in self-reported pain (P=.014), pain catastrophization (P<.001), and the Tampa Scale of Kinesiophobia (P=.012) immediately after mirror therapy; however, the means did not meet or exceed the minimal detectable change (MDC) for each outcome measure. There was a significant increase (mean, 14.5°) in affected shoulder flexion AROM immediately postmirror therapy (P<.001), which exceeded the MDC of 8°.

      Conclusions

      A brief mirror therapy intervention can result in statistically significant improvements in pain, pain catastrophization, fear avoidance, and shoulder flexion AROM in patients presenting with shoulder pain with limited AROM. The immediate changes may allow a quicker transition to multimodal treatment, including manual therapy and exercise in these patients. Further studies, including randomized controlled trials, are needed to investigate these findings and determine longer-term effects.

      Keywords

      List of abbreviations:

      AROM (active range of motion), CI (confidence interval), CNS (central nervous system), CS (central sensitization), GMI (graded motor imagery), MCID (minimal clinical important difference), MDC (minimal detectable change), PCS (Pain Catastrophization Scale), PNE (pain neuroscience education), TSK (Tampa Scale of Kinesiophobia)
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