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Effects of repeated +Gz forces on masticatory muscles
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 5
- DOI:
- 10.3760/j.issn:1002-0098.2002.05.003
- Key Word:
- 咀嚼肌;加速度;组织学
Abstract： 目的观察持续性高正加速度重复作用对大鼠咀嚼肌的影响.方法雄性Wistar大鼠48只随机分成4组,每组12只.A组为空白对照;B组地面固定5 min;C组固定于离心机转臂上,俯卧位,头向轴心,+1 Gz 离心5 min;D组体位同C组,+10 Gz离心30 s,间隔时+1 Gz离心 60 s,连续每日5次,每周4 d ,共3周.观察咬肌、颞肌、翼外肌的组织形态学改变.结果 A组、B组和C组咬肌、颞肌、翼外肌肌纤维排列整齐,粗细均匀,肌节完整,肌横纹清晰,线粒体正常.D组咬肌、颞肌、翼外肌肌血管扩张,组织充血,部分肌纤维扭曲、断裂、横纹消失,翼外肌甚至出现肌纤维溶解.部分肌原纤维溶解,线粒体肿胀,糖原减少.结论持续性高正加速度重复作用可引起咀嚼肌不同程度的损伤.
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