Muscles of shoulder; posterior

Acromion

C7 SP

Deltoid

Infraspinatus

Infraspinatus fascia

Lateral head (triceps)

Latissimus dorsi muscle

Lavator Scapulae

Long head (triceps)

Rhomboid major

Rhomboid minor

Spine of Scapula

Supraspinatus

T12

Teres major

Teres minor

Trapezius

Triceps brachii