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Biomechanics of Skeletal Muscle (Hamill ch 4, Cram Ch 2, pp 43-64)

Biomechanics of Skeletal Muscle (Hamill ch 4, Cram Ch 2, pp 43-64). Properties of muscle-tendon function Extensibility and elasticity Elastic and contractile components Irritability and the ability to develop tension Structural Org of Skeletal Muscle Motor Unit .

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Biomechanics of Skeletal Muscle (Hamill ch 4, Cram Ch 2, pp 43-64)

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  1. Biomechanics of Skeletal Muscle(Hamill ch 4, Cram Ch 2, pp 43-64) • Properties of muscle-tendon function • Extensibility and elasticity • Elastic and contractile components • Irritability and the ability to develop tension • Structural Org of Skeletal Muscle • Motor Unit

  2. Biomechanics of Skeletal Muscle • The motor unit and Electromyography (Figure from lab) • motoneuron & all innervated fibers • Fiber types I (SO), IIA (FOG), IIB (FG) • Muscle Fiber Type • Selective recruitment of fiber types – size principle: • SOFOGFG

  3. Recruitment proceeds from smallest fibers to largest (the size principle)

  4. Muscle Fiber Types

  5. Methodology article: DeLuca, Carlo J. (1997) The use of surface Electromyography in biomechanics. J Appl Biomech, 19:135-163. Review Article: Morrish, G. (1999) Surface electromyography Methods of analysis, reliability, and main applications Physical and Rehabilitation Medicine, 11:171-205. EMG website assignment: EMG Tutorials and Whitepapers

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