[Demonstration of spine-bearing dwarf neurons in the caudatus-putamen complex of the rat following pargyline application].

The neostriatum of adult rats pretreated wit pargyline was investigated by means of the rapid Golgi procedure. An hitherto unknown spine-bearing neuron typ with a soma size ranging from 6 to 8 microm could be demonstrated. Owing to its morphological features, this neuron type is regarded to be a striatal interneuron. The mode of transmission and the functional role of these neurons within the caudatus-putamen-complex is still to be examined.