The acquisition of the straight-alley approach response for water was studied among four motivational states: 23-hr. and 15-hr. water deprivation and carbachol and angiotensin brain stimulation of the lateral septal nucleus and subfornical organ. All subjects acquired the straight-alley response with the fastest speeds seen among 23-hr. water-deprived rats. These results support other findings that centrally induced drug conditions, like natural deprivation conditions, will support the acquisition of operant behaviors in rats.
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