Insular cortex and consummatory successive negative contrast in the rat.

  title={Insular cortex and consummatory successive negative contrast in the rat.},
  author={Jian-You Lin and Christopher Roman and Steve Reilly},
  journal={Behavioral neuroscience},
  volume={123 4},
Rats that are expecting a high value reward (e.g., 1.0 M sucrose) show an exaggerated underresponding when they are instead given a low value reward (e.g., 0.15% saccharin), an effect termed successive negative contrast (SNC). In the present experiment, insular cortex-lesioned (ICX) rats showed normal responsivity to sucrose and saccharin prior to the reward downshift. However, when switched from sucrose to saccharin during the postshift trials these rats displayed no evidence of SNC. Indeed… CONTINUE READING

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