Osteopathic Understanding of the Shoulder Flashcards Preview

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Flashcards in Osteopathic Understanding of the Shoulder Deck (24):

Humerus, scapula, clavicle, ribcage all form what?

bony shouler components


The bony shoulder components are comprised of what structures?

  1. Clavicle
  2. Humerus
  3. Ribcage
  4. Scapula


How many joints assist in forming the functional shoulder joint? What are they?

  1. 4 joints in total
  2. Glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic


What joint maximizes motion by sacrificing stability?

glenohumeral joint


Which joint is stabilized by the rotator cuff?

glenohumeral joint


Which joint has a significantly weak anterior/posterior capsule making it the prime location for dislocation

Glenohumeral joint.


Describe multiple aspects that make the glenohumeral joint unique.

  1. Maximized mobility by sacrificing stability
  2. Weak anterior and posterior capsules(increasing likelihood for dislocation in these directions).
  3. Stabilized by the rotator cuff.


Describe the degrees of motion the glenohumeral joint is able to rotate through.

  • Abduction: 180 degress
  • Adduction: 45 degrees
  • Flexion: 90 degress
  • Extension: 45 degrees
  • Internal rotation: 55 degrees
  • External rotation: 40-45 degrees


What are the flexors of tehe glenohueral joint?

  1. Deltoid
  2. Coracobrachioradialis
  3. Pectoralis Major
  4. Biceps


What are the extensors of the glenohumeral joint?

  1. Latissimus dorsi
  2. Teres Major
  3. Deltoid (posterior fibers)
  4. Teres minor
  5. Triceps


What are the abductors of the glenohumeral joint?

  1. Deltoid
  2. Supraspinatus
  3. Serratus Anterior


What are the adductors of glenohumeral joint?

  1. Pectoralis major
  2. Latissimus dorsi
  3. Teres minor
  4. Deltoid


What are the external rotators of glenohumeral joint?

  1. Infraspinatus
  2. Teres minor
  3. Deltoid


What are the internal rotators of the glenohumeral joint?

  1. Subscapularis
  2. Pectoralis major
  3. Latissimus dorsi
  4. Teres minor
  5. Deltoid


The scapulothoracic joint can be damaged and prevent shoulder mobility by what?

  1. loss of muscle tension
  2. T spine dysfunction
  3. Rib/scapula dysfunction


What are the elevators, protractors, and retractors of the scapulothoracic joint?

  • Elevators: trapezius, levator scapulae, rhomboid major/minor
  • Protractor: Serratus anterior
  • Retractors: Rhomboid major/minor, trapezius


What is unique of the articulation of the acromioclavicular joint?

  1. planar joint that has ball-and-socket type motion
  2. Stabilized by the acromioclavicular and coracoclavicular ligaments


From the neck what does the brachial plexus pass in between that provides it some sort of protection?

  1. pass between teh anterior and middle scalene muscle.


  1. Limitations of motions (flexion, abduction, extension)
  2. Muscle dysfunction
  3. Fascial tension
  4. Fracture, dislocation, degeneration
    1. All above features will contribute to SD of which joint?

Characteristic of SD to glenohumeral joint.


SD to glenohumeral joint is characterized by:

  • Limitations of motions in circumduction
  • muscle dysfunction
  • Fascial tension
  • Fracture, Dislocation, Degeneration


SD dysfunction to the acromioclavicular joint is characterized by what?

  1. restricted rotation
  2. clavicle rotates in relation to the humerus
  3. AC joint separation, impingement, fracture will definitely cause SD


SD of the sternoclavicular joint is caused by what?

  1. fractures will cause SD of sternoclavicular joint.
  2. prevents the gliding motion (ant/post, sup/inf, and rotation)


What effect can poor posture (slumping forward) lead to?

  1. protracts scapula
  2. tightens the pec major, and biceps
  3. therefore have unbalanced scapula motion (scapula protracted)
  4. causes rotator cuff imbalance that increases potential for injury