Mastoid process

Japanese: mastoid process(英語表記)mastoidprocess
Mastoid process

…the temporal bone is extremely complex, containing the inner and middle ear. mastoid process A thumb-sized rounded projection on the human temporal bone that is located behind and below the external auditory canal. It is thought to have developed to accommodate the attachment of the sternocleidomastoid muscle.

*Some of the terminology that mentions the "mastoid process" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…側頭骨は内部に内耳と中耳を収めているので,はなはだ複雑である。乳様突起mastoid processヒトの側頭骨にあって,外耳道の後下方にある親指大の丸みをおびた突起。胸鎖乳突筋が付着するために発達したものと思われる。…

※「mastoid process」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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