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.

  • I'm not sure I understand the movement as you described it. When you say "around the axis of the arm", do you mean around the humerus or the radius?
    – Alec
    Jul 27, 2018 at 11:03
  • @Alec, I'm keeping my arm completely straight with the palm of my hand flat against a surface. I'm twisting the elbow joint back and forth. Jul 27, 2018 at 11:55

1 Answer 1


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.


  • Thanks. I have a followup question. Forearm twisting happens at two joints as far as I can see. The wrist joint, and the elbow joint. I feel like twisting of these two joints must use different muscles, because in my left arm, I can twist these two joints independently. But in my right arm (with issues since my birth), I can rotate the wrist joint, but I can't rotate the elbow joint at all. What muscles rotate the wrist joint? And what muscles rotate the elbow joint? Jul 27, 2018 at 13:49

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