[Catecholaminergic centers of the sheep encephalon. Immunocytochemistry. II. Mesencephalon and diencephalon].

In the sheep, the structures exhibiting the whole of catecholaminergic containing perikarya of the sheep myelencephalon and metencephalon were studied in a previous work using tyrosine hydroxylase immunocytochemistry. Mesencephalon and diencephalon were investigated in the same way here. As seen in the precedent paper, catecholaminergic perikarya were more scattered in homologue structures of the sheep, as compared with the rat. Immunocytochemistry revealed more labeled structures than did the histochemical fluorescence method, suggesting a possible lack of dopadecarboxylase in these structures, that are not marked by the Falck technique.