Frozen shoulder Flashcards
Prevalence
20-30% elderly, >70% rotator cuff disease
4 joints in skeleton
- Glenohumeral
- Acromioclavicular
- Sternoclavicular
- Scapulothoracic
Glenohumeral joint
Superior, middle, inferior ligaments
Acromioclavicular
Fibrous, little movement, full abduction, adduction and flex, interacts with subacromial space (acromioclavicular and coracoclavicular joints)
Sternoclavicular
Rotates with elevation 30-40
Scapulothoracic
Lies against posterior lateral thoracic wall, origin for rotator cuff muscles, deltoid and trapezius
What affects stability?
Capsule, labrum, ligaments, rotator cuff muscles, long head biceps
Imbalance of muscle strength/hypermobility >
Higher risk of impingement/tendonopathy
Adduction
Pec major and lat dorsi
Flexion
Pec major and deltoid
Extension
Lat dorsi, teres major and deltoid
Lateral rotation
Infraspinatus, teres minor
Medial rotation
Pec major, lat dorsi, deltoid , subscapularus
Subacromial bursa
Between supraspinatus tendon and acromion
Injury shoulder >
Rotator cuff injury, stress capsule, bicipital tendinitis, instability, tear