ABSTRACT
The origin of afferent connections to the hypothalamic paraventricular nucleus was studied in the rats with the method ot retrograde axonal transport of HRP.A small amount of HRP was delivered electrophretically into the hypothalamic paraventricular nucleus. The HRP labelled cells ware observed in the lateral septal nucleus, amygdaloid nucleus, hippocampus, subiculum,bed nucleus of the stria terminalis, -parafascicularic nucleus of the thalamus, anterior hypothalamic area, suprachiasmatica nucleus, supraoptic nucleus, circalaris nucleus, hypothalamic dorsomedial nucleus, hypothalamic ventromedial nucleus, posterior hypothalamic nucleus, arcuate nucleus, mamillaris nucleus, midbrain central gray, dorsal tegmental nucleus, lateral parabrac-hial nucleus, median raphe nucleus, locus coeruleus, solitary nucleus and lateral rati-cular nucleus