[The dendritic structure of the habenula in the albino mouse]

The habenular complex of adult albino mice is studied with the Golgi method. In the medial habenular nucleus 2 neuronal types were distinguished; one of them is restricted to a small near to the commissura habenularis. The principal neuronal type is characterized by complicated dendritic ramifications and the presence of dendritic glomeruli encapsulated by protoplasmic astroglial membranes. In the lateral habenular nucleus three neuronal types were found, all of them with long, poorly ramified dendrites, but differing with respect to the size of their somata and their dendritic profiles. Thus, concerning their dendritic structure, the two regions of the habenula do not show any similarity.