[Accessory tendons in the human carpal tunnel]

Statistical analysis reveals that from 4 persons one possess supernumerary tendon on the right hand, one on the left hand, one on both hands and one has no one. If a supernumerary tendon is found, the probability of appearance of further accessory tendons is enhanced. The 3 fingers of the ulnar side of the hand appear as an uniform group, while the indicis seems to play a special role. A new variation of muscle which runs through the canalis carpi is described.