BIOB32H3 Lecture Notes - Brachioradialis, Hyoid Bone, Temporal Muscle
28 Mar 2013
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Document Summary
Muscular system: includes all skeletal muscle tissue that can be controlled voluntarily. Organization of skeletal muscle fibers: parallel muscle, convergent muscle, pennate muscle, unipennate, bipennate, multipennate, circular muscle (sphincter) Levers: rigid structure that moves on a fixed point, the fulcrum, changes direction and strength of applied force, changes distance and speed of movement, three classes, first class, second class, third class, most common in the body. Origins and insertions: muscles can be identified by origin, insertion and action, origin = stationary end, insertion = movable end. Actions: muscles can be classified by action, agonist (prime mover, antagonist, synergist, fixator. Names of skeletal muscles: names give clues to muscle characteristics, location, fascicle organization, relative position, structure, size, shape, origin and insertion, action. Axial and appendicular muscles: axial musculature arises on axial skeleton, positions head and spinal column and moves the rib cage, appendicular musculature moves and stabilizes components of the appendicular skeleton.
