Muscle that Flexes the lower arm and supinates the hand. Post author By Anonymous Post date January 7, 2025 Related Posts:What muscle adducts the arm and flexes the shoulder?Which shoulder muscle abducts, flexes, and extends…When a person supinates during a closed chain… ← A dissecting sponge that is a small roll of heavy cotton tap… → Accessory organ that is a fish shaped organ lying in the arm…