title: [Effects of 100 Hz vibration on ultrastructure of soleus muscle in tail-suspended rats].
abstract: OBJECTIVE
  To study the effects of 100 Hz vibration on ultrastructure of intrafusal and extrafusal fibers in soleus muscle of tail-suspended rats.
  
  
  METHODS
  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.
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  High frequency vibration can counteract the effect of simulated weightlessness on ultrastructure of intrafusal and extrafusal fibers in soleus muscles of rats.
authors.affiliation: Department of Physiology, Medical School of Xi'an Jiaotong University, Xi'an Shannxi, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yang
authors.forename: Xiao-li
authors.initials: XL
authors.lastname: Fan
authors.forename: Xin-ai
authors.initials: XA
authors.lastname: Song
mesh_terms: D000818:Animals; D005260:Female; D019417:Hindlimb Suspension; D018656:Muscle Fibers, Fast-Twitch / Q000648:ultrastructure; D018482:Muscle, Skeletal / Q000648:ultrastructure*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014732:Vibration; D018544:Weightlessness Countermeasures; D018474:Weightlessness Simulation