APA 1313 Lecture Notes - Lecture 7: Anconeus Muscle, Lesser Tubercle, Greater Tubercle

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

Document Summary

Notes for lecture 7: muscles of upper limb. One part attaches to thoracic wall and scapular. Extrinsic shoulder muscles: because one in one the trunk and the other is on the upper limb. Levator scapulae and rhomboids are located underneath the trapizius and latissimus dorsi. Intrinsic, because proximal and distal attachment are in upper limbs. Levator and rhomboids are covered by the trapizius muscle. Divided in 3 parts based on the direction the muscle fibres are running. End of shoulder shrug movement to bring shoulder back down. Most powerful adductor and extensor of the arm. Contracts muscle fibers get shorter intrinsic shoulder muscle. Muscle gets shorter, humurus moves closer to scapular (abduction) 4 muscles form musculotendinous rotator cuff around glenohumeral joint. All rotate humers expect supraspinatus because it helps with shoulder adduction. Held glenoid in place because they surround glenoid head. Only one attaches to greater tubercle, other 2 attaches to lesser tubercle.