origin-supraspinous fossa of scapula, insertion: greater tubercle of humerus, action-abduction at shoulder

origin-infraspinous fossa of scapula, insertion-greater tubercle of humerus, action-lateral rotation at shoulder

origin-subscapular fossa of scapula, insertion-lesser tubercle of humerus, action-medial rotation at shoulder

origin-lateral border of scapula, insertion-greater tubercle of humerus, action-lateral rotation at shoulder

origin-inferior angle of scapula, insertion-intertubercular groove of humerus, action-extension, adduction, and medial rotation at shoulder

O-cartilages of ribs 2-6, body of sternum, and inferior, dedial portion of clavicle, I-crest of greater tubercle and lateral lip of intertubercular groove of humerus; A-flexion, adduction, and medial rotation at shoulder

origin-spinous processes of inferior thoracic and all lumbar vertebrae, ribs 8-12, and lumbodorsal fascia, insertion-intertubercular groove of the humerus, action-extension, adduction, and medial rotation at shoulder

Origin-clavicle and scapula, Insertion: humerus, action-abduction at shoulder

origin-occipital bone and spinous processes of thoracic vertebrae, insertion-clavicle and scapula, action-elevate, retract, depress, or rotate scapula upward, elevate clavicle, or extend neck

O-cartilages of ribs 6-12, iliac crest, and lumbodorsal fascia, I-linea alba and pubis, A- compresses abdomen

O-lumbodorsal fascia and iliac crest, I-inferior ribs, xiphoid process, and linea alba, A-compresses abdomen, depresses ribs, flexes or bends spine

O-external and inferior borders of ribs 5-12, I-linea alba and iliac crest, A-compresses abdomen, depresses ribs, flexes or bends spine

O-superior surface of pubis around symphysis, I-inferior surfaces of costal cartilages (ribs 5-7) and xiphoid process, A- depresses ribs, flexes vertebral column, compresses abdomen