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Understanding Musculoskeletal Disorders: Causal Factors, Diagnosis, and Work-Relatedness

This lecture delves into musculoskeletal disorders (MSDs), defined as disorders of the musculoskeletal system linked to occupational factors. It covers the intricate relationship between work environments and MSDs, focusing on various types, including tendonitis, carpal tunnel syndrome, and osteoarthritis. The presentation includes discussion on research methodologies, such as observational studies and cohort designs, as well as important concepts like dose-response and job stress modeling. Learn about common MSDs, their symptoms, diagnoses, and work-related causal factors.

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Understanding Musculoskeletal Disorders: Causal Factors, Diagnosis, and Work-Relatedness

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Presentation Transcript

  1. Psy 552 Ergonomics & Biomechanics Lecture 20

  2. MSDs • “A descriptor for disorders and diseases of the musculoskeletal system having proven or hypothetical work related causal components” • The concept is similar to: • … • … • … • …

  3. MSD Modeling • Dose-Response… • Biomechanically… • Job design and stress model…

  4. MSD Information • Progression… • Classification… • Diagnosis…

  5. MSD research evaluation • Selection bias… • Response bias… • Confounding… • Misclassification bias…

  6. MSD research evaluation (cont.) • Generalizability… • Sample size…

  7. MSD research methods • Experiments • Observational studies… • … • … • … • …

  8. Prospective cohort

  9. Case-control design

  10. Cross-sectional studies

  11. Case-series study

  12. Exposure measurements • Bernard et al. (1994)… • Fransson-Hall et al. (1995)…

  13. Aspects of the MSD literature • Association between disease and work exposure… • Temporality… • Specificity… • Consistency…

  14. Aspects of the MSD literature (cont.) • Predictability… • Consistency of findings • The NIOSH categories…

  15. Tendon Disorders • Tendonitis and tenosynovitis – inflammation of the tendon or synovial membrane of the tendon sheath. • Locations…

  16. Peripheral nerve disorders • Mechanical nerve entrapment…

  17. Tension neck syndrome • Symptoms: • Diagnosis: • Affected population: • Prediction:

  18. Tension neck syndrome (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  19. Shoulder tendonitis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  20. Shoulder tendonitis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  21. Epicondylitis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  22. Epicondylitis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  23. Carpal tunnel syndrome • Symptoms: • Diagnosis: • Affected population: • Prediction:

  24. Carpal tunnel syndrome (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  25. De Quervains tendonitis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  26. De Quervains tendonitis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  27. Hand arm vibration syndrome • Symptoms: • Diagnosis: • Affected population: • Prediction:

  28. Hand arm vibration syndrome (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  29. Dupuytren’s contracture • Symptoms: • Diagnosis: • Affected population: • Prediction:

  30. Dupuytren’s contracture (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  31. Achilles tendonitis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  32. Achilles tendonitis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  33. Thoracic outlet syndrome • Symptoms: • Diagnosis: • Affected population: • Prediction:

  34. Thoracic outlet syndrome (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  35. Radiculopathy • Symptoms: • Diagnosis: • Affected population: • Prediction:

  36. Radiculopathy (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  37. Osteoarthritis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  38. Osteoarthritis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  39. Hypothenar hammer syndrome • Symptoms: • Diagnosis: • Affected population: • Prediction:

  40. Hypothenar hammer syndrome (cont.) • Consistency of association: • Causal factors: • Work relatedness:

  41. Knee bursitis • Symptoms: • Diagnosis: • Affected population: • Prediction:

  42. Knee bursitis (cont.) • Consistency of association: • Causal factors: • Work relatedness:

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