Brachycephaly (brachycephaly; from the Greek. brachys - short and kephale - head) - korotkovolnovoi, i.e., the shape of the head with a comparatively large cross-and small-diameter longitudinal cerebral part of the skull. Brachycephaly characterized leading index 81,0 and above. The world population B. as the predominant form of common among different ethnic groups: in Central Europe, on Caucasus, in Central Asia, the Indians of America and other fossil ancestors person brachycephaly almost never occurs. Frequency B. has increased since the late Paleolithic and in many areas continued to increase in recent times. Cm. also the Skull.