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著作: [川合 暢彦]/Ryota Sano/J A M Korfage/Saika Nakamura/[田中 栄二]/Tim van Wessel/G E J Langenbach/[丹根 一夫]/Functional characteristics of the rat jaw muscles: daily muscle activity and fiber type composition/[Journal of Anatomy]

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EID
196094
EOID
879544
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LastModified
2017年12月13日(水) 18:19:10
Operator
大家 隆弘
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田中 栄二
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種別 必須 学術論文(審査論文)
言語 必須 英語
招待 推奨
審査 推奨 Peer Review
カテゴリ 推奨
共著種別 推奨
学究種別 推奨
組織 推奨
  1. 徳島大学.大学院ヘルスバイオサイエンス研究部.再生修復医歯学部門.顎口腔再建医学講座.口腔顎顔面矯正学(2004年4月1日〜2015年3月31日)
  2. 広島大学
  3. University of Amsterdam
著者 必須
  1. 川合 暢彦
    役割 任意
    貢献度 任意
    学籍番号 推奨
  2. (英) Ryota Sano
    役割 任意
    貢献度 任意
    学籍番号 推奨
  3. (英) J A M Korfage
    役割 任意
    貢献度 任意
    学籍番号 推奨
  4. (英) Saika Nakamura
    役割 任意
    貢献度 任意
    学籍番号 推奨
  5. 田中 栄二([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.臨床歯学系.口腔顎顔面矯正学])
    役割 任意
    貢献度 任意
    学籍番号 推奨
  6. (英) Tim van Wessel
    役割 任意
    貢献度 任意
    学籍番号 推奨
  7. (英) G E J Langenbach
    役割 任意
    貢献度 任意
    学籍番号 推奨
  8. 丹根 一夫([広島大学])
    役割 任意
    貢献度 任意
    学籍番号 推奨
題名 必須

(英) Functional characteristics of the rat jaw muscles: daily muscle activity and fiber type composition

副題 任意
要約 任意

(英) Skeletal muscles have a heterogeneous fiber type composition, which reflects their functional demand. The daily muscle use and the percentage of slow-type fibers have been shown to be positively correlated in skeletal muscles of larger animals but for smaller animals there is no information. The examination of this relationship in adult rats was the purpose of this study. We hypothesized a positive relationship between the percentage of fatigue-resistant fibers in each muscle and its total duration of use per day. Fourteen Wistar strain male rats (410-450 g) were used. A radio-telemetric device was implanted to record muscle activity continuously from the superficial masseter, deep masseter, anterior belly of digastric and anterior temporalis muscles. The degree of daily muscle use was quantified by the total duration of muscle activity per day (duty time) exceeding specified levels of the peak activity (2, 5, 20 and 50%). The fiber type composition of the muscles was examined by the myosin heavy chain content of the fibers by means of immunohistochemical staining. At lower activity levels (exceeding 2 and 5% of the peak activity), the duty time of the anterior belly of digastric muscle was significantly (P < 0.01) longer than those of the other muscles. The anterior belly of digastric muscle also contained the highest percentage of slow-type fibers (type I fiber and hybrid fiber co-expressing myosin heavy chain I + IIA) (ca. 11%; P < 0.05). By regression analysis for all four muscles, an inter-muscular comparison showed a positive relationship between the duty time (exceeding 50% of the peak activity) and the percentage of type IIX fibers (P < 0.05), which demonstrate intermediate physiological properties relative to type IIA and IIB fibers. For the jaw muscles of adult male rats, the variations of fiber type composition and muscle use suggest that the muscle containing the largest amounts of slow-type fibers (the anterior belly of digastric muscle) is mainly involved in low-amplitude activities and that the amount of type IIX fibers is positively related to the generation of large muscle forces, validating our hypothesis.

キーワード 推奨
  1. (英) Animals
  2. (英) Electromyography
  3. (英) Male
  4. (英) Masticatory Muscles
  5. (英) Muscle Fibers, Fast-Twitch
  6. (英) Muscle Fibers, Skeletal
  7. (英) Muscle Fibers, Slow-Twitch
  8. (英) Myosin Heavy Chains
  9. (英) Rats
  10. (英) Rats, Wistar
  11. (英) Telemetry
発行所 推奨
誌名 必須 Journal of Anatomy(Anatomical Society of Australia and New Zealand/Anatomical Society of Great Britain and Ireland/Anatomical Society of Southern Africa)
(pISSN: 0021-8782, eISSN: 1469-7580)
ISSN 任意 1469-7580
ISSN: 0021-8782 (pISSN: 0021-8782, eISSN: 1469-7580)
Title: Journal of anatomy
Title(ISO): J Anat
Supplier: Anatomical Society
Publisher: Cambridge University Press
 (NLM Catalog  (Wiley  (Scopus  (CrossRef (Scopus information is found. [need login])
必須 215
必須 6
必須 656 662
都市 任意
年月日 必須 2009年 10月 6日
URL 任意
DOI 任意 10.1111/j.1469-7580.2009.01152.x    (→Scopusで検索)
PMID 任意 19811563    (→Scopusで検索)
NAID 任意
WOS 任意 000271960600005
Scopus 任意
評価値 任意
被引用数 任意
指導教員 推奨
備考 任意
  1. (英) Article.Affiliation: Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima 734-8553, Japan. kamo@dent.tokushima-u.ac.jp

  2. (英) Article.PublicationTypeList.PublicationType: Journal Article

  3. (英) OtherID: PMC2796788