Background and Objective:Movement representation techniques such as motor imagery (MI) and action observation (AO) could play an important role in the field of rehabilitation of patients with musculoskeletal pain; however, the effects of these tools on clinical pain remain unclear. Our objective is therefore to develop a systematic review and meta-analysis of the effects of MI and AO regarding the pain intensity on patients with musculoskeletal pain. Databases and Data Treatment: MEDLINE, EMBASE, CINAHL and Google Scholar were searched. Last search was run on July 2019. Meta-analysis was conducted to determine the effectiveness on pain intensity in patients with post-surgical pain or chronic pain, and GRADE was used to rate the quality, certainty and applicability of the evidence. Results: A total of 10 studies were included. AO or MI were compared versus usual rehabilitation care. The meta-analysis showed statistically significant differences in MI and AO interventions in patients with pain after surgery in six studies, with a large clinical effect (n = 124; SMD = −0.84; 95% CI: −1.47 to −0.21). In patients with chronic pain, results showed statistically significant differences in MI and AO interventions in three studies, with a large clinical effect (n = 83; SMD = −2.14; 95% CI: −3.81 to −0.47).
Risk of bias, imprecision and inconsistency decreased the GRADE level of evidence.Conclusions: There was very low-quality evidence regarding the effects of movement representation techniques intervention (AO and MI) on pain intensity in patients with post-surgical pain. In addition, there was very low-quality evidence regarding the effects of MI and AO interventions on chronic pain. Significance: Movement representation techniques in combination with usual care are capable of producing a decrease in pain intensity compared with conventional treatment, in both post-surgical and chronic pain. However, the very low-quality evidence found regarding these techniques showed that more research is needed for their application in a clinical context.
K E Y W O R D Saction observation, chronic pain, motor imagery, movement representation techniques, musculoskeletal pain