The influence of dehydration on the changes in activity of neurocytes of the subfornical organ in the brain of Rana temporaria L. in annual cycle.

The changes in volume of neurocyte nuclei of the subfornical organ (SFO) of Rana temporaria L. under the influence of dehydration were analyzed in the annual cycle. Dehydration conspicuously influenced the activity of the neurocytes of the SFO during the year, depending on the stage of active life on land. It is suggested that in the amphibian under study, SFO participates in the regulation of water balance.