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Chapter 3

Chapter 3 - Term Definition Actin-myosin cross bridge The...

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Term: Actin-myosin cross bridge Definition: The dynamic interaction between two muscle proteins, essential to the mechanics of muscle contration Term: Active insufficiency Definition: The reduced strength of an active movement caused by an over-shortening of the agonist multi-articular muscle Term: Agonist Definition: The muscle or muscle group that is most directly involved with the execution of a particular movement Term: Antagonist Definition: The muscle of muscle group that produces the action opposite that of the agonist muscle
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Term: Co-contraction Definition: Typically describes the condition when the agonist and antagonist muscles are simultaneously and isometrically active, often to provide stability to a joint Term: Concentric Activation Definition: A type of muscle activation that results in contraction or shortening of the muscle Term: Contracture Definition: Abnormal shortening or stiffening of a muscle or connective tissue typically resulting in postural abnormalities
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