KINE 2031 Lecture Notes - Serratus Anterior Muscle, Deltoid Muscle, Trapezius Muscle
2 Feb 2014
School
Department
Course
Professor
Document Summary
Smooth muscle: not give a striated appearance, individual fibers are not parallel, you find these smooth muscles around fluid structures over the body, glands, gi track, anytime there is compression to move fluid. Cardiac muscle: striated, non parallel muscle fibers, fiber arrangement similar to smooth muscle, ends are called intercalated discs. Skeletal muscle action: movement or non movement - two distinct types, isometric - no movement, concentric - movement: shortening contraction, origin muscle tendon attaches to our trunk o, the distance between origin and insertion has decreased. Levers: mass, length, rotate, fulcrum is what the lever rotates on, three classes of levers, teeter totter - first class lever. Fulcrum in the middle, force is mass, resistance due to gravity. Fulcrum in the length of the lever not in the end. Effort arm - distance from fulcrum from the application of effort. Resistance arm - distance from fulcrum from the resistance.
