Anatomy of the Shoulder and Elbow Flashcards
Which muscles attach to the greater tuberosity of the humerus?
- Supraspinatus
- Infraspinatus
- Teres minor
Which muscle attaches to the lesser tuberosity of the humerus?
-Subscapularis
What are the functions of the clavicle?
- Strut to support the shoulder
- Protects the brachial plexus and vessels
- Attachment for muscles
Which muscles attach to the clavicle?
- Trapezius
- Deltoid
- Pectoralis major
- Subclavius
- SCM
- Sternohyoid
Name the three gleno-humeral ligaments
Superior, middle and inferior
What is the labrum and what is its function
- Fibrocartilage
- Elevates the glenoid edge, doubles the glenoid depth, increases the surface area and limits glenohumeral translation
What are the functions of the rotator cuff muscles?
- Blend with the capsule (protection and stability)
- Hold the head of the humerus against the glenoid cavity during shoulder movements
- Supraspinatus - not a rotator of the shoulder joint
Which muscles flex the shoulder?
Pectoralis major, coracobrachialis, biceps and anterior deltoid
Which muscles extend the shoulder?
Teres major, latissimus dorsi and posterior deltoid
Which muscles abduct the shoulder?
Middle deltoid and supraspinatus
Which muscles adduct the shoulder?
Pectoralis major and lattisimus dorsi
Which muscles medially rotate the shoulder?
Teres major and subscapularis
Which muscles laterally rotate the shoulder?
Teres minor and infraspinatus
Weakness of which muscle can cause winging of the scapula?
Serratus anterior
Name the two articulations that exist at the elbow
- Humeroulnar
- Humeroradial
