In this study, brain self-stimulation phenomenon is confirmed from albino rats, and reward summation functions are derived from the reward seeking behavior caused by various current frequencies. A linear functional relationship is found between the re...
In this study, brain self-stimulation phenomenon is confirmed from albino rats, and reward summation functions are derived from the reward seeking behavior caused by various current frequencies. A linear functional relationship is found between the reward effect and the logarithmic current frequency. Selected brain region is the pure reward site of lateral hypothalamus. The result of experiment indicates that modified runway measurement developed by Neeley et al. is not better than the traditional runway measurement in the pure reward site. There is no relationship between the latency to press the lever at the end of the runway and the reward effect caused by various current frequencies. It can thus be interpreted that the present finding supports indirectly the result of Neeley et al. that the latency to press the lever reflects the aversiveness of the stimulation.