SIMULTANEOUS BILATERAL OCCURRENCE OF A M-EXTENSOR DIGITI MEDII AND A M-EXTENSOR DIGITORUM BREVIS

For the first time, the simultaneous and bilateral occurrence of two v ariants of the extensors of the fingers, M. extensor digiti medii and M. extensor digitorum brevis, is reported. The extensor of the middle finger arises from the distal fourth of the radius and runs to the bas e of the proximal phalanx. The short extensor of the fingers arises fr om the metacarpal region and inserts into the dorsal aponeurosis. Both muscles are innervated by the R. profundus n. radialis.