BIOB33H3 Lecture 7: Lecture 7 BIOB33
1 Feb 2019
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Document Summary
Muscles which position the pectoral girdle: these musc"s also coordin w/ the musc"s that move the arm, levator scapulae elevates the scapula, o: transverse processes of c1-c4. I: scapula: rhomboid major adducts and performs downward rotation of the scapula, o: spinous processes t2-t5. I: scapula: rhomboid minor same function as rhomboid major, o: spinous processes c7-t1. I: scapula: serratus anterior protracts shoulder and upward rotation of scapula, o: anterior and superior margins of ribs 1-9. I: vertebral border of scapula: pectoralis minor depresses and protracts shoulder / downward rotation of scapula / elevates the ribs, o: anterior surface and superior margins of ribs 3-5. The muscular system: appendicular musculature: trapezius may elevate, retract, depress or rotate scapula depending other muscles + also extends the neck, o: occipital bone and spinous processes of thoracic vertebrae. Anterior view: coracobrachialis: adduction at the shoulder, o: coracoid process of scapula. I: humerus: deltoid: adducts the arm, o: clavicle and scapula.
