Insular cortex and consummatory successive negative contrast in the rat.
Insular cortex and consummatory successive negative contrast in the rat.
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大鼠的岛叶皮质和完整的连续负对比。
DOI：
10.1037/a0016460
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发表时间：
2009
影响因子：
1.9
通讯作者：
Reilly,Steve
中科院分区：
文献类型：
--
作者：
Lin,Jian-You;Roman,Christopher;Reilly,Steve
期待高价值奖励（如1.0 M蔗糖）的大鼠在被给予低价值奖励（如0.15%糖精）时表现出夸张的反应不足，这种效应被称为连续负对比（SNC）。在本实验中，岛叶皮质损伤（ICX）大鼠在奖赏下降前对蔗糖和糖精表现出正常的反应。然而，当在轮班后的试验中从蔗糖切换到糖精时，这些大鼠没有显示出SNC的证据。事实上，在慢档试验中，这些ICX大鼠一直比ICX大鼠在整个实验中保持更多的糖精。讨论了潜在的解释，包括损伤引起的准确识别移位后糖精刺激的新颖性的能力损伤。（PsycINFO数据库记录(c) 2016 APA，版权所有）
Rats that are expecting a high value reward (eg, 1.0 M sucrose) show an exaggerated underresponding when they are instead given a low value reward (eg, 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, over the downshift trials these ICX rats consistently drank more saccharin than the ICX rats maintained on saccharin throughout the experiment. Potential interpretations are discussed including a lesion-induced impairment in the ability to accurately recognize the novelty of the postshift saccharin stimulus.(PsycINFO Database Record (c) 2016 APA, all rights reserved)