[A previously unknown nucleus in the lateral loop of the dolphin brain, its morphologic organization and origin].

An earlier unknown cell formation in the lateral loop of the dolphin brain has been first shown and studied. On the basis of cytoarchitectonical and topographical characteristics its homology with the corresponding nucleus of other mammals has been established. The investigation has brought a substantial correction to the morphology of nuclei of the lateral loop of dolphins since the formation described proved to be a ventral nucleus of the lateral loop while the structure known in the literature under this name represents an intermediate nucleus of the lateral loop of the animals concerned.