The Effects of Hippocampal and Area Parahippocampalis Lesions in Pigeons: I. Delayed Matching to Sample
The Effects of Hippocampal and Area Parahippocampalis Lesions in Pigeons: I. Delayed Matching to Sample
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鸽子海马和海马旁区域病变的影响：I. 样本延迟匹配
DOI：
10.1080/713932650
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发表时间：
1997
影响因子：
1.7
通讯作者：
B. Alsop
中科院分区：
文献类型：
--
作者：
M. Colombo;Nicola Swain;David Harper;B. Alsop
进行了四项实验，利用延迟样本匹配（DMS）程序来确定双侧海马和海马旁区（Hp-APH）损伤对鸽子视觉记忆的影响。在实验 1 中，我们在术前和术后为三只具有丰富术前视觉 DMS 经验的鸽子生成了延迟 0、1.5、3、6 和 12 秒的视觉保留梯度。双侧 Hp-APH 病变对视力保留没有任何影响。在实验 2 中，我们检查了 Hp-APH 损伤对延迟 0 秒的视觉 DMS 任务的获取以及延迟 0、3、6、12 和 24 秒的后续保留性能的影响。未手术的对照鸽子和 Hp-APH 鸽子之间无论是在学习视觉 DMS 任务所需的训练次数还是在随后的视觉保留表现水平方面都没有差异。在实验3和4中，我们检查了Hp-APH鸽子是否可能比对照鸽子对前摄干扰（通过减少试验间隔的持续时间）和追溯干扰（通过引入延迟间隔照明）的影响更敏感。虽然减少试验间间隔的持续时间和增加延迟间隔照明的水平都会导致视觉 DMS 任务的表现水平较低，但没有迹象表明 Hp-APH 鸽子比未操作的对照鸽子更容易受到干扰水平变化的影响。这些发现支持了这样的观点，即鸽子的 Hp-APH 在纯视觉信息的处理和保留中几乎没有发挥作用。
Four experiments were conducted to determine the effects of bilateral damage to the hippocampus and area parahippocampalis (Hp-APH) on visual memory in pigeons using the delayed matching-to-sample (DMS) procedure. In Experiment 1, we generated visual retention gradients with delays of 0, 1.5, 3, 6, and 12 sec both preoperatively and postoperatively in three pigeons with considerable preoperative visual DMS experience. Bilateral Hp-APH lesions had no effect whatsoever on visual retention. In Experiment 2, we examined the effects of Hp-APH lesions on both the acquisition of a visual DMS task with a 0-sec delay, and the subsequent retention performance with delays of 0, 3, 6, 12, and 24 sec. There was no difference between unoperated control pigeons and Hp-APH pigeons either in terms of the number of sessions required to learn the visual DMS task or in terms of their subsequent visual retention performance levels. In Experiments 3 and 4, we examined whether Hp-APH pigeons might be more sensitive than control pigeons to the effects of proactive interference (by reducing the duration of the intertrial interval) and retroactive interference (by introducing delay-interval illumination). Although reducing the duration of the intertrial interval and increasing the level of delay-interval illumination both resulted in lower performance levels on the visual DMS task, there was no indication that the Hp-APH pigeons were any more affected by the changes in interference levels than were unoperated control pigeons. These findings support the view that the Hp-APH in pigeons plays little role in the processing and retention of purely visual information.