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Quantitation of cFos-IR in the rostral nucleus of the solitary tract (rNTS) and the intermediate NTS (iNTS) in response to peripheral injection of either 0.9% saline or 1 mg/kg naloxone, followed 30 min later by PVN injection of either isotonic saline or 1 μg NPY. Changes in cFos-IR were seen only in the condition of PVN-administered NPY with food consumption. *Significant from sal/sal control. Error bars represent SEM.
