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Muscle Cont

Muscle Contraction Terms

QuestionAnswer
Isotonic Force of contraction is constant - muscle shortens
Isometric Force of contraction changes - muscle length remains the same
Concentric Overalll shortening of the muscle occurs as it generates tension and contracts against resistance
Eccentric Overall lengthening of the muscle occurs as it develops tension and contracts to control motion against the resistance of an outside force
Origin One of two muscle attachment "sites" which is fixed in some way - is often the proximal bone
Insertion The other "site" of the muscle attachment which moves as a result of muscle contraction - is often the distal bone
Sprain Severe stretch, stress of tear of soft tissues (joint capsule, liagment, tnedon muscle) which can result in mild to severe instability around the corresponding joint
Strain Overstretching, overexertion, overuse of soft tissue that is less severe than sprian, ranging from slight trauma or unaccustomed repeated trauma of minor degree which must not be aggravated by movement during the healing process
Spasm Prolonged involuntary contraction of a muscle. Further motion is prevented by this muscular response and it is usually accompanied by pain. Any intervention utilizing exercise is not appropriate.
Created by: Nlockhart
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