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I need an explanation of active and passive insufficiency. What is the difference? What are some...

I need an explanation of active and passive insufficiency. What is the difference? What are some scenarios of active & passive insufficiency?

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Answer #1

Active insufficiency occurs when a muscle can no more get shortened so as to maintain or generate active tension.

Example :in standing while the hamstrings contract to flex the knee ,the hip also moves into extension.

Passive insufficiency is when the opposing muscle can no longer be lenghthened .

Example hamstrings may limit the hip flexion when the knee is in full extension since they are maximally stretched in this position

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