Macphail E M, Reilly S, Good M
Department of Psychology, University of York, Heslington, United Kingdom.
Behav Neurosci. 1993 Apr;107(2):289-98. doi: 10.1037//0735-7044.107.2.289.
In 2 experiments we explored the effects of lateral versus medial laminar lesions of the hyperstriatum in pigeons (Columba livia); medical lesions were largely confined to the hyperstriatum accessorium, and lateral lesions to the hyperstriatum dorsale and hyperstriatum ventrale. In Experiment 1, lateral, but not medial, lesions disrupted acquisition of a simultaneous conditional discrimination; both medial and lateral lesions disrupted reversal of the discrimination. The reversal deficits of the medial and lateral groups were quantitatively similar, and both groups showed exaggerated positional responding. In Experiment 2, neither medial nor lateral lesions disrupted acquisition of a successive conditional discrimination. We conclude that lateral hyperstriatal damage does not obtain a general disruption of conditional learning; we speculate that the lateral hyperstriatum may play a critical role in configural learning.
在两项实验中，我们探究了鸽子（家鸽）上纹状体外侧与内侧损伤的影响；内侧损伤主要局限于副上纹状体，外侧损伤则涉及背侧上纹状体和腹侧上纹状体。在实验1中，外侧而非内侧损伤干扰了同时性条件辨别学习的获得；内侧和外侧损伤均干扰了辨别的反转。内侧组和外侧组的反转缺陷在数量上相似，且两组均表现出过度的位置反应。在实验2中，内侧和外侧损伤均未干扰相继性条件辨别学习的获得。我们得出结论，外侧上纹状体损伤不会导致条件学习的普遍破坏；我们推测外侧上纹状体可能在构型学习中起关键作用。
