Neurology Edited by Professor Emeritus Desire' Dubounet, IMUNE

Example: Amputation at the shoulder joint is 100% impairment of theupper extremity, and 60% impairment of the whole person.Abnormal MotionThe shoulder has three motion planes, each contributing a relative value toits function. Complete loss of shoulder function is considered to be a60% impairment of the upper extremity. Flexion is considered to be 40%of shoulder motion and extension 10% of shoulder motion. Therefore,flexion/extension is considered to be 50% of shoulder motion, or 30% ofthe upper extremity. Abduction is considered to be 20% of shouldermotion and adduction 10% of shoulder motion. Therefore,abduction/adduction is considered to be 30% of shoulder motion, or 18%of the upper extremity. Internal rotation is considered to be 10% ofshoulder motion and external rotation 10% of shoulder motion.Therefore, internal/external rotation is considered to be 20% of shouldermotion, or 12% of the upper extremity.Flexion and ExtensionMeasure the maximum flexion and extension and record the goniometerreadings (Figures 39 & 40, p. 35). Round the figures to the nearest 10°.From Figure 41 (p. 36), match the measured flexion and extension degrees(V) to their corresponding impairments to determine the upper extremityimpairment due to loss of shoulder flexion (IF%) and extension (IE%).