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Inflammation reduces physiological tissue tolerance in the development of work-related musculoskeletal disorders
1Physical Therapy Department, College of Health Professions, Temple University, 3307, North Broad Street, Philadelphia, PA 19147, USA. aebarr@temple.edu
Abstract:
Work-related musculoskeletal disorders (MSDs) cause substantial worker discomfort, disability and loss of productivity. Due to the difficulty in analyzing the tissues of patients in the early stages of work-related MSD, there is controversy concerning the pathomechanisms of the development of these disorders. The pathophysiology of work-related MSD can be studied more easily in animal models. The purpose of this review is to relate theories of the development of tissue injury due to repeated motion to findings of recent investigations in animals that address the role of the inflammatory response in propagating tissue injury and contributing to chronic or recurring tissue injury. These tissue effects are related to behavioral indicators of discomfort and movement dysfunction with the aim of clarifying key time points for specific intervention approaches. The results from animal models of MSD are discussed in the light of findings in patients, whose tissues are examined at a much later phase of MSD development. Finally, a conceptual model of the potentially negative impact of inflammation on tissue tolerance is proposed along with suggestions for future research directions.
Insights
Investigating work-related musculoskeletal disorders (MSDs) in animal models reveals inflammation
Area of Science:
- Orthopedics
- Occupational Health
- Inflammation Research
Background:
- Work-related musculoskeletal disorders (MSDs) lead to significant worker discomfort, disability, and lost productivity.
- Early-stage MSD tissue analysis is challenging, leading to debate on disorder development mechanisms.
- Animal models offer a more accessible platform for studying MSD pathophysiology.
Purpose of the Study:
- To connect theories of repetitive motion tissue injury with animal study findings.
- To explore the role of inflammation in propagating and chronicizing tissue injury in MSD.
- To identify critical intervention points by linking tissue effects to behavioral indicators.
Main Methods:
- Review of animal models investigating the inflammatory response in MSD.
- Correlation of animal findings with later-stage patient tissue examination results.
- Development of a conceptual model for inflammation's impact on tissue tolerance.
Main Results:
- Animal models demonstrate inflammation's role in progressive tissue injury.
- Behavioral indicators in animals correlate with observed tissue effects.
- Inflammation appears to negatively impact tissue tolerance.
Conclusions:
- Inflammation is a key factor in the development and chronicity of work-related MSD.
- Animal models provide valuable insights into MSD mechanisms, complementing human studies.
- Further research is needed to understand inflammation's precise role and develop targeted interventions.
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