Kinesiology 2241A/B Lecture Notes - Lecture 10: Vastus Lateralis Muscle, Myosin, Golgi Tendon Organ

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

The muscles overlay the skeleton and provide the means to move it (muscles pull) Each muscle produces a motion when it creates tension and tries to shorten. Its attachments and orientation determine what moves and how. Muscle fibers can shorten (concentric) or lengthen (eccentric) Muscle fibers run in different directions along the axis of pull. Some muscles have fibers running in several different orientations and these combinations create more complex movements about the joint. Note the different shapes and wrappings of the muscles. Note the different alignment of the fibers within the muscles. Note the size (large or small) of the tendon attachments at either ends. The proximal attachment of a muscle is its origin. The distal attachment of a muscle is the insertion. Sartorius: in the cross section can be nearly a meter long, this is why muscle cells need more than one nucleus, this is one cell travelling nearly a meter.