[Histochemical fluorescence study of aminergic cells throughout the central nervous system of the migratory locust (author's transl)].

We have investigated the aminergic neurosecretory cells in the brain and the ganglia of the ventral nerve cord of the adult female locust, by means of the Falck and Hillarp method, with or without a block of the degradation of amines by nialamide. In the brain, we have confirmed the presence of catecholamines and probably indolamines-containing cells and defined their positions in the protocerebrum and the lateral zones of the deutocerebrum and the tritocerebrum. In the ventral cord, we have found groups of catecholaminergic cell bodies in suboesophageal, thoracic and abdominal ganglia, and probably indolaminergic cell bodies in thoracic and some abdominal ganglia. Aminergic fibres are present in all the ventral cord. They are especially numerous in suboesophageal and thoracic ganglia. In these ganglia, some fibres enter the roots of some somatic nerves.