Consummatory behaviors and locomotor exploration evoked from self-stimulation sites in rats

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19 rats with electrodes implanted in lateral hypothalamus and other diencephalic, mesencephalic, and forebrain structures were tested for electrically evoked behavior and self-stimulation (SS). Some consummatory behaviors were selectively associated with SS. Locomotor exploration (LE), observed at 28 points, was the most consistently evoked behavior associated with SS. Significant positive correlations were found between maximum scores and thresholds of LE speed and SS rates. SS-LE points were located primarily in the medial forebrain bundle. The findings show that reinforcement is associated with excitation of neural mechanisms mediating approach sequences consisting of forward locomotion and consummatory reactions. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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