Most literature describes Nervus radialis lesions. De Franco et al. state that in general a radial nerve palsy may be defined as partial or complete. Complete motor loss occurs in approximately 50–68 % of cases [5] and [6]. Primary nerve palsies identified during the initial evaluation of the fracture occur at the time of the injury. Ten percent to 20 % of nerve palsies develop during the course of treatment. These are referred to as secondary radial nerve palsies [7, 8]. The extent of injury to peripheral nerves can be defined using Seddon’s classification system [4] (Table 27.2).