Becker H C, Jarvis M F, Wagner G C, Flaherty C F
Physiol Behav. 1984 Nov;33(5):707-12. doi: 10.1016/0031-9384(84)90035-0.
Rats shifted from a 32% to 4% sucrose solution consume substantially less 4% sucrose than unshifted animals that experience only the 4% solution. This negative contrast effect was found to be attenuated by lesions of the lateral aspects of the amygdala (basolateral, lateral, and basomedial nuclei) and eliminated by lesions of the medial aspects of the amygdala (corticomedial and central nuclei). The results are discussed in terms of the possible role the amygdala may play in some of the proposed determining factors mediating consummatory negative contrast (e.g., emotionality, neophobia, memory).
从32%蔗糖溶液转换到4%蔗糖溶液的大鼠，与只经历4%蔗糖溶液的未转换大鼠相比，消耗的4%蔗糖要少得多。研究发现，杏仁核外侧（基底外侧、外侧和基底内侧核）受损会减弱这种负性对比效应，而杏仁核内侧（皮质内侧和中央核）受损则会消除这种效应。研究结果从杏仁核在一些介导消费性负性对比的假定决定因素（如情绪、新事物恐惧、记忆）中可能发挥的作用方面进行了讨论。
