Psy 552 Ergonomics & Biomechanics

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: