MSK Tut 7

• anterior displacement:

  • usually caused by trauma in abduction and external rotation with a posterior-anterior force
• posterior displacement:

  • usually caused by trauma - falling on outstretched hand (FOOSH) - anterior-posterior force
• Hypothesis:

  • usually either:
  • stiffness - hypomobility conditions
  • OA
  • frozen shoulder
  • instability - hypermobility conditions
  • dislocation - anterior, posterior or inferior displacement
  • weakness - rotator cuff related shoulder pain conditions
• inferior displacement:

  • caused by trauma in hyperabduction
• • step deformity is a visible bump on the shoulder that indicates that the acromioclavicular joint has been ruptured