Shoulder,Thorax,Abdomen, and Back

Origin: occipital bone,ligament nuchae, and spinous processes of thoracic vertebraeInsertion:clavicle and scapulaaction: may elevate, retract,depress,or rotate scapula

Origin: clavicle and scapulaInsertion: deltoid tuberosity of humerusAction: abduction of shoulder

Origin: infraspinous fossa of scaupulaInsertion: greater tubercle of humerusAction: lateral rotation at shoulder

Origin: supraspinatus fossa of scapulaInsertion: greater tubercle of humerusAction: abduction at shoulder

Origin: inferior angle of scapulaInsertion:medial lip of intertubercular groove of humerusAction: Extension and medial rotation at shoulder

Origin:spinous processes of vertebraeInsertion: vertebral border of scapula Action: adducts and rotates scapula down

Origin: spinous processes of inferior thoracic and all lumbar vertebrae, ribs 8-12, and thoracolumbar fascia

Origin: Subscapular fossa of ScapulaInsertion: Lesser tubercle of humerusAction:Medial rotation at shoulder

Origin: Coracoid processInsertion: medial margin of shaft of humerusAction: adduction and flexion at shoulder

Origin:Anterior surfaces and superior margins of ribs 3-5 and facia covering the associated external intercostal muscles.Insertion: coracoid process of scapulaAction: depresses and protracts shoulder; rotates scapula so glenoid cavity moves at a downward rotation; elevates ribs if scapula is stationary

Origin:Cartilages of ribs 2-6, body of sternum, and inferior, medial portion of clavicleInsertion:cres of greater tubercle and lateral lip of intertubercular sulcus of humerusAction: flexion, adduction, and medial rotation at shoulder

Origin:Anterior and superior margins of ribs 1-8 or 1-9Insertion: Anterior surface of vertebral border of scapulaAction:protracts shoulder; rotates scapula so glenoid cavity moves in upward rotation

Origin: inferior border of a ribInsertion:superior border of a rib belowAction:elevates ribs, increases volume in thorax

Origin:transverse process of the cervical vertebraeInsertion: first and second ribsAction:neck flexion

Origin:superior surface of pubis around symphysisInsertion:ribs 5-7 and xiphoid process of sternumAction: depresses ribs, flexes vertebral column and compresses abdomen