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ESS 303 - Biomechanics

ESS 303 - Biomechanics. The Muscular System. Muscles and Articulations. Uniarticulate Biarticulate Multiarticulate Active Insufficiency: Difficulty in producing full ROM movements in 2(+) joints at the same time

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ESS 303 - Biomechanics

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  1. ESS 303 - Biomechanics The Muscular System

  2. Muscles and Articulations • Uniarticulate • Biarticulate • Multiarticulate • Active Insufficiency: Difficulty in producing full ROM movements in 2(+) joints at the same time • Passive Insufficiency: Difficulty in achieving full ROM stretches in 2(+) joints at the same time

  3. Pennation Muscle Movement Muscle Fiber Orientation Non-pennated Pennated

  4. Pennation Non-pennated Pennated

  5. Greater Force Greater Movement Pennation Fusiform Unipennate Bipennate Multipennate

  6. Contraction Types • Concentric • Eccentric • Isometric • Isotonic • Isokinetic • Static

  7. Fiber Types

  8. Epimysium Perimysium Endomysium Sarcoplasm Sarcolemma Nuclei Muscle Belly Fasciculus Fiber (Cell) Gross Structure

  9. The Sarcomere: Z Line to Z Line

  10. Z Line M Line Z Line H Zone Thick Filament (Myosin) Thin Filament (Actin) I Band A Band I Band

  11. Z-Line H-Zone M-Line Z-Line I-Band A-Band I-Band

  12. Heavy Myromyosin S1 Light Myromyosin S2

  13. Length-Tension Relationship Too Short Too Long

  14. Length-Tension Relationship % of Max Tension Length

  15. Force-Velocity Relationship Force Eccentric Isometric Concentric Velocity

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