Good M, Macphail E M
University of York, U.K.
Q J Exp Psychol B. 1994 Aug;47(3):263-91.
Three experiments examined the effects of hippocampal lesions in pigeons on overshadowing, blocking, and a latent inhibition treatment (non-differential reinforced preexposure) using a simultaneous visual discrimination paradigm. The results showed that hippocampal damage did not influence overshadowing (Experiment 1) or blocking (Experiment 2) but did attenuate the retardation in conditioning associated with non-differential reinforced preexposure to to-be-discriminated stimuli (Experiment 3). Hippocampal birds also displayed impaired autoshaping (Experiments 1, 2, and 3). The correspondence between the behavioural effects of avian and mammalian hippocampal lesions is discussed, and the implications of the present pattern of results for avian hippocampal function are considered.
三项实验采用同时视觉辨别范式，研究了鸽子海马体损伤对遮蔽效应、阻断效应以及一种潜伏抑制处理（非差别强化预暴露）的影响。结果表明，海马体损伤并未影响遮蔽效应（实验1）或阻断效应（实验2），但确实减弱了与对待辨别刺激进行非差别强化预暴露相关的条件作用延迟（实验3）。海马体受损的鸽子还表现出自动形成条件反射的能力受损（实验1、2和3）。本文讨论了鸟类和哺乳动物海马体损伤行为效应之间的对应关系，并考虑了当前结果模式对鸟类海马体功能的启示。
