Neurology Edited by Professor Emeritus Desire' Dubounet, IMUNE

ulnar deviation or 20° radial deviation is a 100% loss of wrist lateraldeviation function. This is equivalent to a 30% impairment of wristmotion and 18% impairment of the upper extremity.Example: Ulnar deviation 0° and radial deviation 10°:IUD% = 5% impairment of the upper extremity.IRD% = 2% impairment of the upper extremity.5% + 2% = 7% impairment of the upper extremity.Example: Wrist ankylosis in 15° radial deviation: IA% = 16% impairmentof the upper extremity.Combining Wrist Abnormal Motion ImpairmentsDetermine the impairments of the upper extremity contributed by abnormalwrist motions (flexion/ extension and radial/ulnar deviation) as describedabove.Note: Impairments of pronation and supination are ascribed to the elbow.Because the relative value of each wrist functional unit has been taken intoconsideration in the impairment charts, impairments of flexion/extensionand radial/ ulnar deviation are added to determine the impairment of theupper extremity.Use Table 3 to relate impairment of the upper extremity to impairment ofthe whole person.Example: Wrist flexion/extension impairment of 16% and wristradial/ulnar deviation impairment of 7%: 16% + 7% = 23% impairment ofthe upper extremity and 14% impairment of the whole person.Example: Wrist ankylosis in 0° flexion and 0° lateral deviation: