Ultrastructural dynamics of the muscular branches of the normal brachial plexus and in exposure to reflexotherapy

The changes in the ultrastructure of myelinic fibers of branchial plexus muscular branches have been studied during exposure to acupuncture of different duration. The studies were performed using muscular branches obtained from the forelegs of sexually mature white rats, weighing 150-170 g. The nerves were processed for electron microscopy according to a conventional technique. It is demonstrated that myelinic conductors react to the exposure by a complex of structural changes of a reactive, non-specific nature.     

Changes in the liver of albino rats after exposure to cold

The liver in the white rats subjected to the effect of a low temperature for 80 days (23 h every day, 5-7 degrees C) has been studied by means of a complex of morphometric techniques. The investigation is also performed 35 days and 4 months after the exposure to cold has been stopped. In the animals decapitated immediately after the exposure to cold has been stopped, there is a certain decrease in the liver mass, in the size of hepatocytes, drop in the karyometric indices. The latter phenomenon is also observed in the liver of the animals 35 days after the exposure to cold has been stopped. In 4 months, the part of the binuclear hepatocytes and the nuclear size is greater than in the control.