Odoriko

Japanese: おどりこ
Odoriko

…In a newborn baby's head, the edges of the flat bones have not yet ossified, so where three or four bones meet, a soft membranous area remains, called the fontanelle. Not only can you feel it with your fingers, but you can see it pulsating in sync with the pulse, so it is also called "odori" or "odoriko," and the name "hiyomeki" comes from this. There are six fontanelles of four types, and the anterior fontanelle (the diamond-shaped fontanelle between the left and right parietal bones and the left and right frontal bones) and the lesser fontanelle (the triangular fontanelle between the left and right parietal bones and the occipital bones) are unpaired, while the anterior and posterior temporal fontanelles are paired. …

*Some of the terminology explanations that mention "Odoriko" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…新生児の頭では扁平骨の周辺部が骨化していないため,3個または4個の骨が相会するところでは柔らかい膜様部が残り,これを泉門という。指で触れることができるばかりでなく,脈拍に一致してぴこぴこ動くのが見えるので〈おどり〉〈おどりこ〉などともいい,〈ひよめき〉もここから出た名である。泉門は4種6個あり,大泉門(左右の頭頂骨と左右の前頭骨の間のひし形の泉門)と小泉門(左右の頭頂骨と後頭骨の間の三角形の泉門)は非対性,前側頭泉門と後側頭泉門は対性である。…

※「おどりこ」について言及している用語解説の一部を掲載しています。

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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