POSTERIOR MUSCLES (ORIGIN, INSERTION ACTION)

Posterior tib

Origin: posterior surface of tibia, surface of fibula and interosseous membrane

Insertion: Tuberosity of navicular bone, all cuneiform bones, cuneiform bones, cuboid bone, bases of metatarsal bone 2-4

Gastrocnemius

Origin:

• lateral head: upper posterolateral surface of lateral condyle of the femur

• medial head: posterior surface of medial femoral condyle, popliteal surface of femoral shaft

insertion: posterior surface of the calcaneus via calcaneal tendon

Triceps brachii

Origins:

• long head: infraglenoid tubercle of the scapula

• medial head: posterior surface of the humerus

• lateral head posterior surface of the humerus

insertion: olecranon of ulna and fascia of forearm

Supinator

Origin: lateral epicondyle of humerus, radial collateral aligament, annular ligament, supinator crest of ulna

insertion: lateral, posterior, and anterior surfaces of proximal third of radius

Hamstrings

Origin: upper lateral facet on the ischial tuberosity

insertion: horizontal groove on the posteromedial surface of the medial tibial condyle

Gluteus maximus

Origin: Lateroposterior surface of sacrum and coccyx, gluteal surface of ilium, thoracolumbar fascia, Sacrotuberous ligament

Insertion: Iliotibial tract, gluteal tuberosity of femur

Gluteus minimus

Origin: gluteal surface of ilium

Insertion: anterior aspect of greater trochanter of femur

Trapezius

Rhomboids

Origin:

• rhomboid minor: nuchal ligament, spinous processes of vertebrae C&-T1

• rhomboid major: spinous process of vertebrae T2-T5

insertion:

• rhomboid minor: Root (medial end) of spine scapula

• rhomboid major: medial border of scapula

Latissimus Dorsi

Origin:

• vertebral part: spinous processes of vertebrae T7-T12, thoracolumbar fascia

• iliac part: posterior third of the crest of ilium the

• costal part: rib 9-12

• scapular part: inferior angle of scapula

insertion: intertubercular sulcus of the humerus, between pectoralis major and teres major muscles (LADY between two MAJORS) (lady refers to lats)

Erector spinae

Splenius capitis & cervicis

CERVICIS

origin: spinous processes of T3-T6 vertebrae

Insertion: transverse processes of C1-C3 vertebrae

CAPITIS

origin: spinous processes of vertebrae C7-T3, nuchal ligament

insertion: lateral superior nuchal line of occipital bone, mastoid process of temporal bone