A theory of human evolution proposed by Dutch anatomist L. Bork (1926). Adult humans have characteristics seen in ape fetuses. For example, they are hairless, have little pigment in the skin and eyes, do not protrude from the chin, have a forward position of the foramen magnum, have a large brain-to-body ratio, maintain the sutures of the skull, and have similar shapes of the pelvis and female labia majora. In other words, humans retain the shapes that are only temporary in the fetuses of these primates throughout their lives. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
オランダの解剖学者L.ボルクによって提唱されたヒトの進化に関する学説(1926)。ヒトの成体には類人猿の胎児にみられる諸特徴が認められる。例えば,無毛性である,皮膚や目の色素が乏しい,あごが突きでていない,大後頭孔の位置が前方にある,脳重量比が大きい,頭蓋の縫合が存続する,骨盤や女性大陰唇の形態が類似していることなどが挙げられる。すなわちヒトは,これら霊長類の胎児では一時的にすぎない形態を終生保持している。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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