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Supinator- cylindrical shaped muscle in the forearm

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Origin: there are a few points of origin near the elbow joint

• lateral epicondyle of the humerus(small round prominence at the bottom of the humerus)
• radial collateral ligament(ligament located on the outside of the elbow joint)
• supinator crest of the ulna(raised ridge that runs down the ulna)
• annular ligament(ligament that surrounds the top of the radius and connects it to the ulna)

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Insertion: Anterior, lateral surface of proximal one-third crest of the radial shaft

Action: Rotates the forearm so the palm is facing upward

Strengthening: Dumbbell Supinating Bicep Curls ( https://www.youtube.com/watch?time_continue=12&v=ow2mdWC6FAc )

Rehabilitation: Theraband Supination

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Fun Fact:

• The supinator is also known as the "supinator brevis"
• The supinator is innervated by the radial nerve
• The most common action that activates the supinator is turning a door knob to the right