APA 1313 Lecture Notes - Lecture 8: Levator Scapulae Muscle, Abdominal External Oblique Muscle, Costal Cartilage

• School: University of Ottawa
• Department: Human Kinetics
• Course: APA 1313
• Professor: Jing L I

Document Summary

Anterior axio-appendicular muscles: or pectoral muscles, attach thoracic wall and upper limb, function : move the pectoral girdle. Subclavius: proximal attachment: junction of 1st rib and its costal cartilage, distal attachment: to inferior surface of middle third of clavicle (subclavius groove, main action: anchors and depresses clavicle. It protracts scapula and holds against thoracic wall; rotates scapula. Posterior axio-appendicular muscle: super cial posterior axio-appendicular (extrinsic shoulder) muscles, trapezius & latissimus dorsi, deep posterior axio-appedicular (extrinsic shoulder) muscles: Levator scapulae&rhomboids: scapulohumeral muscles (intrinsic shoulder teres muscles), deltoid, teres major, rotator cuff muscles. Trapezius: attaches pectoral girdle to the skull and vertebral column. Superior and inferior bers act together in rotating the scapula. It is a powerful adductor and extensor of the arm. To initiate movement during rst 15 of abduction, the deltoid is assisted by the supraspinatus: posterior part : extends and laterally rotates shoulder joint.