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Lecture9 - Muscle Physiology

Lecture9 - Muscle Physiology - Muscle Physiology Properties...

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Muscle Physiology Properties of Muscle Contractility: Ability to shorten with force Excitability: Ability to respond to a stimulus Extensibility: Capable of stretching to is resting length and beyond Elasticity: Ability to recoil to original resting length after being stretched Series-Elastic Component Passive tension exerted by elastic properties in series and parallel to contractile components For shortening during contraction, non-contractile parts must be pulled tight The non-contractile parts (particularly tendons) have elasticity Tendons are the series element, and provide series-elastic component, membranes are parallel Muscle Tissue Types 1. Skeletal Attached to bones by tendons Aponeurosis: a very broad tendon Multiple nuclei and peripherally located Striated, Voluntary and Involuntary Origin/Head of the muscle attached to more stationary of two bones Insertion : Muscle end attached to bone with greatest movement Belly : Largest portion of the muscle between origin and insertion Synergists : Muscles that work together to cause movement Prime Mover
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