Neurology Edited by Professor Emeritus Desire' Dubounet, IMUNE

3. Ring finger:Calculations for the ring finger are the same as above and combine to59% impairment of the ring fingerThe ring finger represents 10% of the hand; therefore, 59% x 10% = 6%impairment of the hand (Table 1).4. Thumb:CMC joint resection arthroplasty: 40% of CMC joint, or 40% x 80% 32%impairment of the thumb.Fusion of MP joint at 20° flexion: IA% = 5% impairment of the thumb(Figure 14).Thumb joint impairments are added directly: 32% + 5% = 37%impairment of the thumb.The thumb represents 40% of the hand; therefore, 37% x 40% = 15%impairment of the hand (Table 1).5. Total hand impairment is calculated by ADDING hand impairmentsderived for each digit: index (16%) + middle finger (12%) + ring finger(6%) + thumb (15%) = 49% impairment of the hand.The hand represents 90% of the upper extremity; therefore, 49% x 90% =44% impairment of the upper extremity.Musculotendinous ImpairmentsIntrinsic Tightness