[Electron microscopic study of the monoaminergic terminals in the caudate nucleus of the rat brain]

A comparative analysis of some electron-microscopic techniques has been carried out to reveal biogenous amines in the rat muscle nucleus caudatus. Monoaminergic terminals were identified by the presence of large and small granular vesicles. The best results were obtained by chromaffine reaction of frozen sections: the revealing of small granular vesicles by this method is 11 fold more effective than that by the use of chromaffine reaction carried out on tissue samples.