徳島大学 教育・研究者情報データベース(EDB)

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

1. 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])

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2. (英) Sano R

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3. 川合 暢彦

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4. (英) Korfage M A J

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5. (英) Nakamura S

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6. 井澤 俊

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7. (英) Langenbach J E G

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8. 丹根 一夫([広島大学])

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(英) Regional differences in fiber characteristics in the rat temporalis muscle

(英) The behavioral differences in muscle use are related to the fiber type composition of the muscles among other variables. The aim of this study was to examine the degree of heterogeneity in the fiber type composition in the rat temporalis muscle. The temporalis muscle was taken from 10-week-old Wistar strain male rats (n = 5). Fiber types were classified by immunohistochemical staining according to their myosin heavy chain content. The anterior temporalis revealed an obvious regional difference of the fiber type distribution, whereas the posterior temporalis was homogeneous. The deep anterior temporalis showed a predominant proportion of type IIA fibers and was the only muscle portion displaying slow type fibers (< 10%). The other two muscle portions, the superficial anterior and posterior temporalis, did not differ significantly from each other and contained mainly type IIB fibers. Moreover, the deep anterior temporalis was the only muscle portion showing slow type fibers (< 10%). In the deep portion, type IIX fibers revealed the largest cross-sectional area (1943.1 +/- 613.7 microm(2)), which was significantly (P < 0.01) larger than those of type IIA and I + IIA fibers. The cross-sectional area of type IIB fibers was the largest in the remaining two muscle portions and was significantly (P < 0.01) larger than that of type IIX fibers. In conclusion, temporalis muscle in rats showed an obvious heterogeneity of fiber type composition and fiber cross-sectional area, which suggests multiple functions of this muscle.

1. (英) Animals
2. (英) Biological Markers
3. (英) Immunohistochemistry
4. (英) Male
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) Temporal Muscle

1. (英) Article.Affiliation: Department of Orthodontics and Dentofacial Orthopedics, The University of Tokushima, Graduate School of Oral Sciences, Tokushima, Japan. etanaka@dent.tokushima-u.ac.jp

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

3. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't

4. (英) OtherID: PMC2666143