[Afferent connections of the lateral vestibular nucleus in the cat].

Localization of labelled neurons (sources of projections to the lateral vestibular nucleus) in the brain was studied by means of microiontophoretic injections of horseradish peroxidase. Bilateral projections of the midbrain structures to all parts of the nucleus mentioned (field of Forel, interstitial nucleus of Cajal, oculomotor nerve nucleus and red nucleus) were found. There have been also shown: bilateral projections from more caudally localized structures of the superior, medial and inferior (descending) vestibular nuclei, group "Y" of the vestibular nuclear complex, facial nucleus and hypoglossi, nucleus prepositus nervi hypoglossi and spinal trigeminal nucleus; ipsilateral projections from crus IIa of lobulus ansiformus of the cerebellar hemisphere; contralateral projections from lateral reticular nucleus of medulla oblongata and Deiters' nucleus. Trajectories of the labelled fibre system projecting to Deiters' nucleus are described.