Methysergide into LPBN of cell-dehydrated rats induced 0.3 M NaCl intake.
Increased Fos immunoreactivity in mNTS/AP and ventral PVN.
Had no effect on oxytocin or vasopressin secretion, or arterial pressure.
Had no effect on gastric emptying of a load of 0.3 M NaCl.
Removes behavioral inhibition induced by osmo- or second-order sensory signals.