Ciliated glial cells and neurons in the interpeduncular nucleus of the frog

Some neurons and glial cells of the interpeduncular nucleus of the adult frog Rana esculenta contain one cilium. The cilium complex shows two-centriole basal organization. Cross striated structures are seen apposed to the centriolar formations. The centriole and associated basal body are always close to the vesicular elements of the Golgi apparatus in the neurons and are surrounded by quite a number of microtubules in the glial cells. The observations suggest that these ciliated cells represent specialized elements in which the cilium has probably the same functional transport properties postulated for cytoplasmic microtubules.