a_Biomechanics2C

a_Biomechanics2C - Lever arm(long bones Fulcrum(synovial...

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1 Biomechanics Biomechanics Good Leverage Permits Small  Muscles to Do Maximum Work Dr. S. C. Williams
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2 Introduction Muscles attach to bones that serve as levers The greater the leverage provided by the bones the  less muscle mass is required to provide a given  amount of work The work of muscles through their skeletal levers is  called biomechanics All three classes of levers are found in the human  body Some individuals have natural biomechanical  advantage
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3 Topics to Be Discussed Components of levers Relation of muscle force and  biomechanical leverage Force diagrams Classes of levers Lab safety Muscle dissections
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4 Biomechanics Biomechanics Components of levers
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Unformatted text preview: Lever arm (long bones) Fulcrum (synovial joint) Force (muscle contraction applied to a bone Resistance (weight to be overcome) Functions of levers: give mechanical advantage Relationship; Force X lever arm length = lever arm length X resistance 5 Force Diagrams Force Diagrams 6 Classes of Levers Class 1 -- R – P – F Class 2 -- P – W – F Class 3 -- W – F – P R = resistance F = force (muscle) P = fulcrum or pivot point 7 Examples of Levers in the Body F=fulcrum E=force R=resistance 8 Laboratory Study of Muscles – Laboratory Study of Muscles – the Old Way the Old Way...
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a_Biomechanics2C - Lever arm(long bones Fulcrum(synovial...

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