[Neuronal structure of the lateral olfactory tract nucleus in the cat brain]

The lateral olfactory tract nucleus of the cat brain has been studied by means of Nissl's and Golgi's methods. This structure is a cortical formation according to its neuronal organization; four layers can be detected in it (zonal, polymorphic, external and internal, and pyramidal). Among long-axonal neurons, besides cells of the subcortical type (dense-branching, treelike), there are neuronal types specific for the cortex--pyramidal, spindle-like, as well as short-axonal neurons of two types--smooth dendritic and neurons having spinelets. Afferent transmitters are mainly presented by olfactory fibres (it is a rather thick fibre forming at its end not a very dense and long branching brush consisting of terminal fibres with beads along their course).