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- W2350522363 abstract "Objective To study the effect of chronic unpredictable stress on ultra-structures of masseter in rats. MethodsThirty-two male Wistar rats,at the age of 12 weeks,were randomly divided into experimental group and control group. Each group was divided into 3-week subgroup and 6-week subgroup(8 rats in each group) . A model of rats with chronic unpredictable stress was established for the experimental group. Rats in the 3-and 6-week subgroups were killed after 3 and 6 weeks,respectively. Some of the masseter and internal pterygoid muscles of rats were cut,and changes in ultra-structures of masseter muscle were observed under transmission electron microscope. ResultsUnder transmission electron microscope,ultra-structures of masseter muscle cells changed significantly in the experimental group. The myofilament was deranged,the z-line was warped,and mitochondria with loss and degrade of cristae were found in 3-week subgroup. Severe vacuolus changes in mitochondria were observed in 6-week subgroup. No obvious change was found in the control group.ConclusionChronic emotional chronic unpredictable stress induces injury of masseter in rats at ultra-structure level." @default.
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- W2350522363 date "2009-01-01" @default.
- W2350522363 modified "2023-09-26" @default.
- W2350522363 title "Changes in ultra-structures of masseter induced by chronic unpredictable stress in rats" @default.
- W2350522363 hasPublicationYear "2009" @default.
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