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Investigating the mechanism of tissue injury,
  degeneration, and repair in Work-related
      Musculoskeletal Disorders (MSD)



         Greg Schroeder, PT, DPT
         TEAMWORKS Therapy, LLC




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MusculoSkeletal Anatomy
                         Muscle              Tendon
  Joint




          Blood          Nerves

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               Common MSD’s
• Tendonitis or tendinosis            •   Muscle Sprains or
  Tendonopathy                            Strains
   – Epicondylitis or
     Epicondylagia                    •   Nerve Compression
• Tenosynovitis                           •   CTS
   – DeQuervains Disease                  •   Cubital Tunnel Syndrome
• Bursitis                                •   Thoracic Outlet Syndrome
• Low Back Pain                           •   Radial Tunnel
   – Variety of potential causes      •   Others
• Ganglion Cysts



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Factors Related
    to MSD
1. Excessive Force
2. High Repetition
3. Prolonged Duration
4. Awkward Postures
5. Compression
6. Vibration
7. Psychosocial
   Stress at Work
8. Medical Conditions




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 Local Changes in the
MusculoSkeletal System




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       Systemic Changes in the
       Musculoskeletal System
• Release of Immuno-
  histochemicals
   – Hsp 72
   – Interleukin-1
   – Macrophage infiltration
• Cytokine-mediated systemic
  inflammatory response
   – Spread of MSD symptoms to other
     extremities
   – Mistaken for faking




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Changes in the Peripheral Nervous
             System




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Changes in the Central Nervous System




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    Neuroplasticity
• The ability of the
  nervous systems
  to change and
  adapt throughout life

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            CNS Changes
• Dedifferentiation of sensorimotor fields.
• Repetitive task lead to degradation of the
  cortex
• Chronic pain had as much as 11% on
  brain atrophy when compared to normals.




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Early Intervention




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posted:5/8/2011
language:English
pages:16