The Pectoral Girdle and the Shoulder Joint (AP) Flashcards
3 joints of the shoulder complex
- Sternoclavicular
- Acromioclavicular
- Glenohumeral
Function of the glenoid labrum
Increase depth and stability of the glenohumeral joint
Muscles of the rotator cuff group
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
Bursae of the shoulder
- Subacromial
- Subscapular
- Subcoracoid
What does the costoclavicular ligament attach to?
- Upper medial part of rib 1 cartilage (inferior)
- Costal tuberosity of clavicle (superior)
What does the costoclavicular ligament do?
- Limits clavicle elevation
- Limits anteroposterior movement
What does the coracoclavicular ligament attach to?
- Clavicle
- Coracoid process of scapula
What does the coracoclavicular ligament do?
- Prevents superior dislocation of AC joint
- Limit rotation of scapula
What movements can occur at the shoulder joint?
- Adduction
- Abduction
- Flexion
- Extension
- Medial rotation
- Lateral rotation
- Circumduction in sagittal plane
Why is upward rotation of the scapula important for shoulder abduction?
Allows the capsule and ligaments around glenohumeral joint and scapulohumeral muscles to maintain length and tension
Which muscles rotate the scapula upwards?
- Serratus anterior
- Trapezius
What are axio-appendicular muscles?
Muscles that extend between the axial and appendicular skeletons
Which axio-appendicular muscles move the humerus?
- Pectoralis major
- Latissimus dorsi
Abductors of the shoulder joint
- Supraspinatus
- Middle deltoid
- Trapezius
- Serratus anterior
Adductors of the shoulder joint
- Pectoralis major
- Latissimus dorsi
- Teres major
