[Changes in the properties of fast and slow rat muscles following cross-reinnervation].

Qualitative and quantitative histochemical and morphometrical studies in intact white and red muscles of Wistar rats revealed different types of cross-section areas, LDH isozymes spectra of muscle fibers, number of nuclei in neuro-muscle junction. Conformation of red muscle to white and partial conversion of white muscle to red occurred after cross-innervation, and alien white fibers appeared in the m. soleus. Activity of LDH3 and LDH4+5 isozymes of heart type spectrum increased after cross-innervation of the m. soleus. An increase in activity of LDH1 and LDH2 isozymes of muscle type spectrum accurred after cross-innervation of white muscle.