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: