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[Effects of 100 Hz vibration on ultrastructure of soleus muscle in tail-suspended rats].

Department of Physiology, Medical School of Xi'an Jiaotong University, Xi'an Shannxi, China.
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering 09/2005; 18(4):259-61.
Source: PubMed

ABSTRACT To study the effects of 100 Hz vibration on ultrastructure of intrafusal and extrafusal fibers in soleus muscle of tail-suspended rats.
Weightlessness was simulated by tail suspension of female rats. The ultrastructure of intrafusal and extrafusal fibers of soleus muscle were examined after exposure to 100 Hz vibration.
The ultrastructure of intrafusal and extrafusal fibers of soleus muscles showed obvious retrograde changes after 7 d tail suspension, whereas these changes were not obvious after 7 d tail suspension plus 100 Hz vibration.
High frequency vibration can counteract the effect of simulated weightlessness on ultrastructure of intrafusal and extrafusal fibers in soleus muscles of rats.

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