L16 Shoulder Complex

Question 1

What is the shoulder complex made of?

Answer 1

• pectoral girdle
  
  • manubrium of sternum
  • clavicles
  • scapulae
• humerus

Question 2

What movements occurs at the shoulder complex?

Answer 2

• flexion and extension - sagittal plane
• adduction/abduction - coronal plane
• medial rotation/lateral roation - transverse plane
• circumduction (think monkey bars)

Question 3

What joints exist in the shoulder complex

Answer 3

• 3 x true bi-articular (synovial) joints
  
  • sternoclavicular
  • acromioclavicular
  • glenohumeral
• 2 x physiological (functional) joints (don’t have joint capsule)
  
  • subdeltoid
  • scapulothoracic
• ligaments for joint stability
• muscles

Question 4

sternoclavicular joint

Answer 4

• connects upper limb to thorax
• saddle joint - elevate/depress; pro- and retract scapula
• articular disc
• dislocation uncommon
• blood supply: internal thoracic, suprascapular
• nerve supply: n. to subclavius

Question 5

sternoclavicular subluxation

Answer 5

where the sternoclavicular ligament (and sometimes also the costoclavicular joint) is torn

• blood vessels at root of neck suscept to injury - esp. if clavicle is pushed back