muscles of upper limb I

Deltoid

O: Spine of the scapula, acromion, clavicle I: Deltoid tuberosity of the humerus A: Flexion, extension, abduction, medial and lateral rotation of the arm at the shoulder join

Teres Major

O: Inferior angle of the infraspinous fossa I: Crest of the lesser tubercle of the humerus A: Adduction and medial rotation of the arm at the shoulder joint

Supraspinatus (RTC)

O: Supraspinous fossa I: Greater tubercle of the humerus A: Abduction of the arm at the shoulder joint

Infraspinatus (RTC)

O: Infraspinous fossa I: Greater tubercle of the humerus A: Lateral rotation of the arm at the shoulder joint

Teres Minor (RTC)

O: Lateral border of the infraspinous fossa I: Greater tubercle of humerus A: Lateral rotation of the arm at the shoulder joint

Subscapularis (RTC)

O: Subscapular fossa I: Lesser tubercle of humerus A: Medial rotation of the arm at the shoulder joint

Trapezius

O: Skull, cervical, and thoracic vertebrae I: Spine of scapula, acromion, clavicle A: Upward rotation, depression, and elevation of scapula

Latissimus Dorsi

O: Lumbar vertebrae, iliac crest, sacrum, thoracic vertebrae I: Intertubercular sulcus of the humerus Action: Extension, adduction, medial rotation

Levator Scapula

O: C1-C4 I: Medial border of scapula above the level of the scapular spine A: Elevation of the spine

Rhomboid Minor

O: C7 and T1 Insertion: Medial border of scapula at the level of the scapular spine Action: Adduction of the scapula

Rhomboid Major

O: T2-T5 I: Medial border of the scapula below the level of the scapular spine A: Adduction of the scapula

Pectoralis Major

O: Clavicular and sternocostal part I: Crest of greater tubercle of the humerus A: Flexion, Adduction, and medial rotation of the arm at the shoulder joint

Pectoralis Minor

O: Ribs 2-5 I: Coracoid process of the scapula Action: Depression of the scapula

Serratus Anterior

O: Ribs 1-8 I: Medial border of scapula A: Upward rotation of the scapula