“…The sex difference is very pronounced which accounts for the higher partial score given for males. The atypical four finger line which can best be described as an incomplete fusion of the two m id-palm ar flexion creases (see Brander, 1940) is also more frequent in the Down syndrome and has been given the partial score 1. The atd angle is determined by the position of three different triradii as indicated by the dotted line in Fig.…”