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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
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:• SO FOG FG
Recruitment proceeds from smallest fibers to largest (the size principle)
Muscle Fiber Types
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 electromyographyMethods of analysis, reliability, and main applicationsPhysical and Rehabilitation Medicine, 11:171-205.
EMG website assignment: EMG Tutorials and Whitepapers
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