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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Zygomatic plate ： ウィキペディア英語版 Zygomatic plate In rodent anatomy, the zygomatic plate is a bony plate derived from the flattened front part of the zygomatic arch (cheekbone).〔Voss, 1988, p. 271〕 At the back, it connects to the front (maxillary) root of the zygomatic arch, and at the top it is connected to the rest of the skull via the ''antorbital bridge''.〔Steppan, 1995, p. 29〕 It is part of the maxillary bone, or upper jaw, which also contains the upper cheekteeth. Primitively, rodents have a nearly horizontal zygomatic plate.〔Wood, 1935, p. 246〕 In association with specializations in zygomasseteric system, several distinct morphologies have developed across the order. The term is also used for an analogous structure in some South American typotheres, including ''Pseudotypotherium''〔Patterson, 1934, p. 124〕 and ''Medistylus''.〔Reguero et al., 2007, p. 1305〕 ==Function== The zygomatic plate serves to resist muscular tension resulting from the contraction of the incisors by the anterior deep masseter muscle; thus, rodents which pulverize hard food with the incisors tend to have broader zygomatic plates than those that rather use their molars for this purpose.〔Voss, 1988, pp. 408–410〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zygomatic plate」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.