[Correlation of the dorsal tendinous variations of the hand with the arrangement of the entire tendinous extensor to the back of the finger in man].

The supplementary tendons attached to the supernumerary muscles of the forearm and the wrist form a particulary deep layer which has it's own tendon sheats and they join principally for the first varitey (musculus extensor communis pollicis et indicis) the back and the base of the first phalange; for the second variety (musculus interosseus dorsalis accessorius) the insertions on the side of the base of the first phalange.