Masticatory muscle architecture in a murine murid, Rattus rattus, and its functional significance

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The internal architecture of the masticatory muscles in a murine murid, <i>Rattus rattus</i>, was examined and compared with our previous description of <i>Peromyscus maniculatus</i>, which seems to have primitive jaw muscles for muroid rodents. Remarkable differences were observed mainly in the masseter muscle and corresponding aponeurosis. The anterior and posterior mandibular aponeuroses for insertion of the masseter deep layer are united as a single sheet in <i>Rattus</i>. In <i>Peromyscus</i>, both the origin and insertion of the anterior part of the masseter deep layer lie on the aponeurosis. In <i>Rattus</i>, however, the deep fibers of the anterior part form a muscular attachment to the bone surface at either end. This characteristic suggests that the maximum angle of gape is increased in murine murids, which allows them to ingest various-sized foods.<br>

収録刊行物

  • Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan  

    Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan 33(1), 35-42, 2008-06-01 

    日本哺乳類学会

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各種コード

  • NII論文ID(NAID)
    10021103189
  • NII書誌ID(NCID)
    AA11185060
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13434152
  • NDL 記事登録ID
    9440923
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z54-G149
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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