My Class

1

IE 552 Mechanics of Musculoskeletal System Dr.
Andris Freivalds Class 25
2
y(s)
3
10K S312s220s
4
K(s2) S22s2
5
Ch.6 Musculoskeletal Disorders Risk Factors

• 1713 Ramazini and butchering
• 1850s England-washer womans syndrome
• 1950s Japan keypunch operators
• 1980s NIOSH newspapers
• 1990s NIOSH/OSHA targeting
• 2001 (Jan. 18) Ergo Standard
• 2001 (Mar) Congress rescinded
• OSHA General Duty Clause

6
Repeated Trauma Incidence Rates
7
Musculoskeletal Disorders (WRMSDs) (cumulative
trauma-, repetitive motion- disorders)

• Tendon disorders
• Tendonitis microtears, fraying
• Tenosynovitis swelling, narrowing of sheath
• Muscle disorders
• Acute strain myalgia
• Chronic strain myosities, myofascial
• Cramping focal distonia

8
Musculoskeletal Disorders (WRMSDs)

• Nerve related disorders
• Entrapment between tissues
• Vascular disorders
• Ischemia of blood from vibration and/or cold
• Bursa disorders
• Bursitis sac with synovial fluid around joint
• Bone and cartilage disorders
• Osteoarthritis degeneration of joint cartilage
• Rheumatoid arthrits inflammation, build-up
• Gout - metabolic disorder, uric crystals in joint

9
Musculoskeletal disorders which may be work
related (WRMSDs)
10
Musculoskeletal disorders which may be work
related (WRMSDs)
Raynauds syndrome (V)
white finger(V)
radiculopathy (cervical syndrome) (N)
ganglionic cysts (T)
tension neck syndrome (M)
Guyon canal syndrome (N)
extensor tenosynovitis(T)
extensor tendinitis (T)
bursitis(J)
shoulder tendinitis (rotator cuff) (T)
Disorders (by type) T Tendon M Muscle N
Nerve V Vascular J Joint
BACK
11
Carpal Tunnel and Thoracic Outlet Syndromes
12
Resisted ROM ManeuversFlexion/Extension
Radial/Ulnar Deviation
13
Diagnostic Tests
Finkelsteins Test Form fist with thumb enclosed
for 1 min.
Phalens Test Press flexed hands together for 1
min. Reverse Phalens Test Press extended hands
together for 1 min.
14
Median, Radial, Ulnar Nerve Innervation Patterns
Tinels Test 2-Pt Discrimination Test Nerve
Conduction Test