Karev G B
Department of Biology, Medical Institute of Varna, Bulgaria.
Am J Phys Anthropol. 1991 Apr;84(4):479-87. doi: 10.1002/ajpa.1330840410.
Hypothenar radial arch was found in 2.07% of the males and 2.82% of females in a sample of 2,130 Bulgarians. Persons bearing the pattern on the right hand display the highest frequency, followed by those bearing the pattern bilaterally and those with it on the left hand. A well-expressed tendency of the hypothenar radial arch towards symmetrical occurrence was disclosed through the ratio between the actual and expected frequency of its bilateral occurrence. This ratio is recommended as an efficient estimator of tendency toward symmetry. The presence of the pattern is associated with morphological peculiarities of the other dermatoglyphic features of the palm. Line A ends at two parts of the palm periphery which are extremes of its usual distribution. Line D is shortened and the ridges run more vertically than in palms without the pattern. The connection of the hypothenar radial arch with the border ulnar triradius, along with the observations on the opposite hypothenars in the unilateral cases, provides a support of Wilder's conception concerning the mode of formation of the pattern. A genealogical tree exhibiting transmission of the pattern over three consecutive generations is presented. A pattern of dominant inheritance with a fairly reduced penetrance is compatible with the genealogical data.
在2130名保加利亚人的样本中，小鱼际桡侧弓在2.07%的男性和2.82%的女性中被发现。右手有该花纹的人出现频率最高，其次是双侧有该花纹的人，然后是左手有该花纹的人。通过小鱼际桡侧弓双侧出现的实际频率与预期频率之比，揭示了小鱼际桡侧弓对称出现的明显趋势。该比率被推荐为对称趋势的有效估计值。该花纹的存在与手掌其他皮纹特征的形态学特点相关。A线在手掌边缘的两个部分结束，这两个部分是其通常分布的极端情况。D线缩短，与没有该花纹的手掌相比，嵴更垂直。小鱼际桡侧弓与尺侧三叉点的连接，以及单侧病例中对侧小鱼际的观察结果，支持了怀尔德关于该花纹形成方式的概念。给出了一个显示该花纹连续三代遗传的系谱树。具有相当低外显率的显性遗传模式与系谱数据相符。
