posterior muscle attachments

supraspinatus

origin: supraspinous fossa of scapula in insertion: capsule of shoulder joint and greater tubercle of humerus

latissimus dorsi

origin (fan): inferior ribs, spines of inferior thoracic and lumbar vertebrae, dorsal sacrum, and iliac crest insertion (point): intertubercular groove of humerus

gluteus maximus

origin: dorsal ilium, sacrum, and coccyx insertion: iliotubial tract and gluteal tuberosity of femur

tensor fascia lata

origin: iliac crest and anterior superior iliac spine insertion: lateral condyle of tibia via iliotibial tract

biceps femoris

origin: ischial tuberosity and lineal aspera insertion: head of fibula and lateral tibial condyle

trapezius

origin (fan): dorsal midline from external occipital protuberance through T12 insertion (point): acromion and spine of scapula and adjacent clavicle