[Notes on the transmitter histochemistry of the cortex cerebelli of rat]

The cortex cerebelli of the normal, adult rat was investigated fluorescence histochemically by means of the paraformaldehyde method according to FALCK and HILLARP (1962) for visualization of catecholamines and a modified ninhydrin-reaction for the demonstration of GABA (PFISTER and GORNE 1978), respectively. The Purkinje neurons were shown to display a considerable variability of the fluorescent GABA reaction product. Noradrenergic boutons were shown to be arranged mostly in a punctate manner around the somata of the Purkinje cells. The Purkinje cell pericarya would thus be under the inhibitory influence of cerebellar bascet neurons as well as of Locus coeruleus neurons.