Studies on Heads and Faces between Sundadonty and Sinodonty

对属于Sundadonty的菲律宾人和属于Sinodonty的日本人和中国人的头面部进行了体尺测量。Sundadonty和Sinodonty两个蒙古族血统的迁徙与现代日本人的起源密切相关。按Martin-Sell的方法测量身高、头长、珠宽、头高、颧骨宽度、双颧骨宽度和形态面高，Minobe等人测量形态面深度。根据测量结果计算出颅面指数(头指数、头长高指数、头宽高指数、形态面指数、颧骨指数和形态面深指数)。结果表明，除头长和面深外，中国人的平均测量值最大，其次是日本人，菲律宾人最小。日本人的头部长度和面部形态深度显著大于其他人群(P&lt；0，01)。这一研究结果支持羽原关于日语起源的双重结构模型。

Somatometric measurements were taken on the craniofacial area of Filipino belonging to Sundadonty and of Japanese and Chinese belonging to Sinodonty. Migration of two mongoloid lineages of Sundadonty and Sinodonty were deeply related to the origin of the modern Japanese. The measurements were stature, head length, bead breadth, head height, bizygomatic breadth, bigonial breadth, and morphologic facial height according to the method by Martin-Seller, and the morphological facial depth by Minobe et al.. Craniofacial indices (the cephalic index, cephalic length-height index, cephalic breadth-height index, morphologic face index, zigomatic gonial index and morphologic face depth index were calculated from the measurements. These measurements and indices were compared in relation to the three populayions statistically.The results were follows, with the exception of head length and morphologic facial depth, the mean values of the measurements were largest in Chinese, followed by Japanese and the smallest in Filipino. Japanese had significantly large head length and morphologic facial depth than the other population (P<0,01). The results of this study supported Hanihara's double structure model on the origin of Japanese.