Background & Aims

Title: Sensory and motor profiles of the contralateral upper limb and neuroplastic changes in individuals with unilateral rotator cuff related shoulder pain – A systematic review
Rotator cuff related shoulder pain (RCRSP)constitutes 65 to 85% of shoulder conditions and have a significant impact on upper extremity function. One third of patients with RCRSP turn chronic and do not improve despite interventions to reverse motor impairments of the shoulder. Numerous studies have established bilateral alterations that underpin a reorganization of the central nervous system in individuals with unilateral chronic musculoskeletal pain. The evidence for sensory and motor profiles of the contralateral limb and neuroplastic (cortical) changes have not been specifically reviewed for RCRSP.
Objectives: To systematically assess, consolidate and appraise available evidence for sensory and motor attributes of the non-injured upper limb and neuroplastic changes in individuals with unilateral RCRSP.

Methods

Methods: A complete search of digital databases and reference lists was carried out to identify studies that evaluated sensory and motor measures of the involved and the uninvolved side in individuals with unilateral RCRSP. This review adhered to the Preferred Reporting Items for Systematic Reviews Meta-Analysis (PRISMA) statement and the recommendations outlined in the Meta-analysis and Systematic Review of Observational Studies in Epidemiology (MOOSE) framework. We included studies involving adult participants aged 18 and above, observational studies with a control group. Studies with no contralateral evaluation and a sample size of less than 10 were excluded. Two reviewers independently screened, appraised, and extracted the data using a customized data extraction tool. The findings from all the studies regardless of their methodological rigor were synthesized. The methodological quality of the included studies was evaluated using an adapted version of the Downs and Black Index.

Results

Results: The initial search of 5 databases, identified a total of 2243 studies. Following duplicate removal, 718 records were screened for titles and abstracts. Sixty- four full texts were screened for eligibility, out of which 35 satisfied the predefined inclusion criteria. Reasons for exclusion included lack of a healthy control group and studies involving experimental shoulder pain. Studies encompassed sensory measures (n=9) and motor measures (n=24), including cortical measures (n=2). Five out of 9 studies reported lower pressure pain thresholds and increased proprioceptive errors compared to the control group. Active trigger points were present bilaterally in individuals with RCRSP. Motor changes included reduced strength (n=7), altered kinematics of the scapula (n=3), and delayed muscle activity (n=4) compared to the pain- free control group. The methodological quality revealed high quality (n=10), moderate quality(n=23), and low quality (n=2) studies.

Conclusions

Conclusion: The available evidence indicates the presence of sensory and motor changes on the contralateral side in individuals with unilateral RCRSP. However, it is important to note the overall quality of evidence was moderate across the studies. Therefore, it is important that clinicians are aware of these changes on the uninjured side of patients with unilateral tendinopathies.

The findings of this review potentially hold significance for comprehending the pathophysiology and devising the management strategies for chronic RCRSP. Future research should include studies with larger sample sizes and must evaluate sensory and motor outcomes across different duration of RCRSP.

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Presenting Author

Kavitha Vishal

Poster Authors

kavitha vishal

MPT

Manipal College of Health Professions, Manipal Academy of Higher Education , Manipal

Lead Author

Ashokan Arumugam

PhD

Lead Author

Gisela Sole

PhD

Lead Author

Shrija Shetty

MPT

Lead Author

G Arun Maiya

PhD

Lead Author

Topics

  • Models: Musculoskeletal