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Hoots : What muscles perform rotation of the elbow joint about the axis of the arm, while keeping the hand fixed? If I extend my arm straight and place my palm against a surface, I can rotate my elbow joint about the axis of the - freshhoot.com

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What muscles perform rotation of the elbow joint about the axis of the arm, while keeping the hand fixed?
If I extend my arm straight and place my palm against a surface, I can rotate my elbow joint about the axis of the arm, while keeping my hand fixed. (ie: I can rotate my elbow joint without rotating my hand)

What are the names of the muscles perform this rotation? Thanks.

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Biceps, Triceps and pronator teres && supinator muscle.

You are using the muscles that normally your forearm uses to twist, but because you focus on not changing the position of your hand your arm twists instead.
www.innerbody.com/image/musc03.html

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