HYPOTHALAMIC NEURON PROJECTION TO AUTONOMIC PREGANGLIONIC LEVELS RELATED WITH GLUCOSE-METABOLISM - A FLUORESCENT LABELING STUDY IN THE RAT

The location of hypothalamic paraventricular neurons projecting to sym pathetic preganglionic levels and related to the autonomic regulation of various organs involved in glucose metabolism (OGM) was determined by ipsilateral injections of two fluorescent tracers, Diamidino Yellow into the left dorsal motor nucleus of the vagus and Fast Slue into th e left intermediolateral cell column of the T8-T9 spinal cord. Hypotha lamospinal neurons were mainly located in the dorsal part of the parav entricular hypothalamic nucleus (PVH) and the hypothalamobulbar neuron s were most abundant in the ventral, medial and extreme lateral parts of the PVH. No double-labelled neurons were found in the hypothalamus. These results can help the knowledge of the neural hypothalamic netwo rk related with the autonomic hypothalamic control.