Muscles of the Shoulder Revision Flashcards
Pectoralis Major
O: clavicle, medial costal cartilage of ribs 1-6 and sternum
I: outer lip of intertubercular groove of humerus
Shoulder - adduction, horizontal adduction, internal rotation
Latissimus Dorsi
O: T7-L5 and sacrum
I: Medial lip of intertubercular groove of humerus
Shoulder - adduction, horizontal adduction, extension, internal rotation
Teres Major
O: inferior and lateral border of scapula
I: Medial lip of intertubercular groove of humerus
Shoulder - adduction, horizontal adduction, extension, internal rotation
Deltoid Anterior Fibres
O: anterior and lateral 1/3 of clavicle
I: deltoid tuberosity
Shoulder - abduction, flexion, horizontal adduction
Deltoid mid fibres
O: lateral acromion process
I: deltoid tuberosity
Shoulder - abduction
Deltoid posterior fibres
O: spine of scapula
I: deltoid tuberosity
Shoulder - abduction, extension, horizontal abduction
Subscapularis
O: anterior surface/subscapula fossa
I: lesser tubercle of humerus
Shoulder - internal rotation (stabilisation of glenohumeral joint)
Supraspinatus
O: above spine of scapula
I: greater tubercle of humerus
Shoulder - abduction (stabilisation of glenohumeral joint)
Infraspinatus
O: below the spine of the scapula
I: greater tubercle of humerus
Shoulder - external rotation (stabilisation of glenohumeral joint)
Teres Minor
O: lateral border of the scapula
I: greater tubercle of the humerus
Shoulder - external rotation (stabilisation of glenohumeral joint)
Triceps Brachii
I: olecranon process
Shoulder - extension, adduction, horizontal abduction
Elbow - extension
Biceps Brachii
I: radial tuberosity
Shoulder - weak flexion, horizontal adduction
Elbow - flexion
Proximal radioulna joint - supination
