The brachioradialis is relaxed in supination but may become a deforming force in pronation.
Reproduced with permission from: Waters PM, Mih AD. Fractures of the distal radius and ulna. In: Rockwood and Wilkins' Fractures in Children, 6th ed, Beaty JH, Kasser JR (Eds), Lippincott Williams & Wilkins, Philadelphia 2006. Copyright © 2006 Lippincott Williams & Wilkins.
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