Radial Nerve Palsy is damage to the radial nerve located at the back of the upper arm that leads to problems with movement or sensation of the back of the arm, forearm, or hand. The radial nerve travels down the arm and controls movement of the triceps muscle at the back of the upper arm. It also controls the ability to bend the wrist backward and helps with the movement and sensation of the wrist and hand.
Injury of Radial Nerve. Healthline. https://www.healthline.com/health/radial-nerve-dysfunction