Kennedy G E
Am J Phys Anthropol. 1986 Dec;71(4):401-15. doi: 10.1002/ajpa.1330710403.
The frequency of auditory exostoses was examined by latitude. It was found that discrete bony lesions of the external auditory canal were, with very few exceptions, either absent or in very low frequency (less than 3.0%) in 0-30 degrees N and S latitudes and above 45 degrees N. The highest frequencies of auditory exostoses were found in the middle latitudes (30-45 degrees N and S) among populations who exploit either marine or fresh water resources. Clinical and experimental data are discussed, and these data are found to support strongly the hypothesis that there is a causative relationship between the formation of auditory exostoses and exploitation of resources in cold water, particularly through diving. It is therefore suggested that since auditory exostoses are behavioral rather than genetic in etiology, they should not be included in estimates of population distance based on nonmetric variables.
通过纬度对耳外生骨疣的发生率进行了检查。结果发现，外耳道的离散性骨病变在北纬和南纬0至30度以及北纬45度以上地区，除极少数例外情况外，要么不存在，要么发生率极低（低于3.0%）。在利用海洋或淡水资源的人群中，耳外生骨疣的最高发生率出现在中纬度地区（北纬和南纬30至45度）。对临床和实验数据进行了讨论，发现这些数据有力地支持了以下假设：耳外生骨疣的形成与冷水资源开发之间存在因果关系，特别是通过潜水。因此，有人提出，由于耳外生骨疣在病因上是行为性而非遗传性的，它们不应被纳入基于非计量变量的群体距离估计中。
