Psy 552 Ergonomics Biomechanics Lecture 20 MSDs o

Psy 552 Ergonomics & Biomechanics Lecture 20

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

MSD Modeling o Dose-Response… o Biomechanically… o Job design and stress model…

MSD Information o Progression… o Classification… o Diagnosis…

MSD research evaluation o Selection bias… o Response bias… o Confounding… o Misclassification bias…

MSD research evaluation (cont. ) o Generalizability… o Sample size…

MSD research methods o Experiments o Observational studies… n n … …

Prospective cohort

Case-control design

Cross-sectional studies

Case-series study

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

Aspects of the MSD literature o Association between disease and work exposure… o Temporality… o Specificity… o Consistency…

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

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

Peripheral nerve disorders o Mechanical nerve entrapment…

Tension neck syndrome o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Shoulder tendonitis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Epicondylitis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Carpal tunnel syndrome o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

De Quervains tendonitis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Hand arm vibration syndrome o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Dupuytren’s contracture o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Achilles tendonitis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Thoracic outlet syndrome o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Radiculopathy o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Osteoarthritis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Hypothenar hammer syndrome o Symptoms: o Diagnosis: o Affected population: o Prediction:

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

Knee bursitis o Symptoms: o Diagnosis: o Affected population: o Prediction:

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