Neurons in the subependymal layer of the rat median eminence.

A considerable number of small and medium-size neurons are described in the subependymal layer of the caudal part of the middle portion of the rat median eminence. They are arranged mainly in rostro-caudally oriented rows. Fine structure of these nerve cells is similar to that of the arcuate neurons. Small axon terminals establish synaptic contacts with these cells. The possible functional significance of these neurons is discussed.