Deltoid

(origin and insertion)

Origin: lateral third of the clavicle, acromion, and spine of the scapula

Insertion: deltoid tuberosity of humerus

Deltoid

(innervation)

Deltoid

(action)

Supraspinatus muscle

(origin and insertion)

origin: supraspinous fossa of scapula

insertion: superior facet of the greater tubercle of the humerus

Supraspinatus Muscle

(innervation)

Infraspinatus muscle

(origin and insertion)

origin: infraspinous fossa

insertion: middle facet of the greater tubercle of the humerus

Infraspinatus muscle

(innervation)

infraspinatus muscle 

(action)

subscapularis muscle

(origin and insertion)

Origin: subscapular fossa of the scapula

Insertion: lesser tubercle of the humerus

Subscapularis muscle

(innervation)

subscapularis muscle

(action)

Teres Major

(origin and insertion)

origin: dorsal surface of the inferior angle of the scapula

Insertion: medial lip of the intertubercular sulcus of the humerus

Teres Major

(innervation)

Teres Major

(action)

Teres Minor

(origin and insertion)

Origin: upper portion of the lateral border of the scapula

Insertion: lower facet of the greater tubercle of the humerus

Teres Minor

(innervation)

Teres Minor

(action)

Latissimus dorsi

(origin and insertion)

origin: spines of T7-T12 thoracolumbar fascia, iliac crest, and ribs 9-12

insertion: floor of the bicipital groove of the humers

latissimus dorsi

(innervation)

latissimus dorsi

(action)