DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell.
Other, less common causes of radial nerve palsy in the arm include compression at the fibrous arch of the lateral head of the triceps and compression by an accessory subscapularis-teres-latissimus muscle.
The radial nerve is also responsible for extending the wrist and fingers, and it controls sensation in part of the hand. Injury to the radial nerve may result in radial neuropathy, or radial nerve palsy.