Posterior Muscles OIA’s

Trapezius

Superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of vertebrae (C7-T12)

Clavicle, acromion and spine of scapula

elevate, retract, and depress scapula

Supraspinatus (SITS)

Supraspinous fossa

Greater tubercle of humerous

Abduct shoulder

Infraspinatus (SITS)

Infraspinous fossa

Greater tubercle of humerus

Laterally rotate shoulder

Teres minor (SITS)

Lateral border

Greater tubercle of humerus

Laterally rotate shoulder

Subscapularis (SITS)

Subscapular fossa

Lesser tubercle of humerus

Medially rotate shoulder

Rhomboid major

Spinous processes of vertebrae (T2-5)

Medial border

Retract and downward rotate scapula

Latissimus dorsi

Spinous processes of vertebrae (T7-L5), iliac crest, and thoracolumbar fascia

Intertubercular/bicipital groove

Extend, adduct, and medially rotate shoulder

Triceps brachii

Long Head: Infraglenoid tubercle (scapula)

Lateral Head: Humerus

Medial Head: Humerus

Olecranon

Extend elbow

Extensor carpi ulnaris

Lateral epicondyle

Fifth metacarpal

Extend and adduct wrist

Extensor carpi radialis longus

Lateral supracondylar ridge (humerus)

Second metacarpal

Extend, abduct wrist

Extensor carpi radialis brevis

Lateral epicondyle

Third metacarpal

Extend, abduct wrist

Gluteus maximus

Iliac crest, sacrum, and coccyx

Iliotibial tract and gluteal tuberosity

Extend and laterally rotate hip

Gluteus medius

Ilium

Greater trochanter

Abduct and medially rotate hip

Piriformis

Sacrum

Greater trochanter

Laterally rotate hip

Semitendinosus

Ischial tuberosity

Pes Anserinus (medial Tibia

Flex knee, extend hip

Semimembranosus

Ischial tuberosity

Medial tibia

Flex knee, extend hip

Biceps femoris

Ischial tuberosity and linea aspera

Head of fibula, lateral tibia

Flex knee, extend and laterally rotate hip

Gastrocnemius

Femoral condyles

Calcaneus

Plantarflex ankle, flex knee

Soleus

Tibia and fibula

Calcaneous

Planatatflex ankle