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Neuropeptide Y is demonstrated as a potent orexigenic peptide when injected into the rat hypothalamic paraventricular nuclei. The neuropeptide Y innervation of paraventricular nuclei originates from both hypothalamic arcuate nuclei and brainstem neurons, whose specific role in the control of food intake is still under discussion. To assess the role of the arcuate neuropeptide Y in the regulation of...