ANATOMY LECTURE 5

ANATOMY LECTURE 5 - ANATOMY LECTURE FIVE Myotendous...

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ANATOMY LECTURE FIVE 2-1-12 Myotendous Junction: Structurally weakest area of muscle, most injuries occur at this junction. Force arm (x) (f) res arm (x) load: Longer force arm (a.k.a. LEVER ARM) = mechanical advantage REFER TO LEVER SYSTEMS , PAGE 327 1st class head nodding what’s the advantage in respect to force, length of lever arm and resistance? 2nd class ball of foot to go up on toes . Resistance in between the force arm and the fulcrum. Longer force arm. Mechanical advantage. Movement What do you sacrifice (speed and ROM?)? 3rd class, elbow . Long resistance arm. Sacrifice force. Gain speed. What are the advantages and disadvantages for each lever system? Slide 3 Relationship of fascicle arrangement to muscle structure – pg 325 Parallel muscle fiber – direct transmission of force as muscle shortens. Disadvantage – need a fairly large tendon, but not enough bone area for bony insertion Unipennate – fibers come in at an angle to the tendon. Advantage – pack more fibers on to one
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This note was uploaded on 04/02/2012 for the course KIN 324K taught by Professor Farrar during the Spring '08 term at University of Texas.

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ANATOMY LECTURE 5 - ANATOMY LECTURE FIVE Myotendous...

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