Localized lesions of arcopallium intermedium of the lateral forebrain caused a handling-cost aversion in the domestic chick performing a binary choice task
Localized lesions of arcopallium intermedium of the lateral forebrain caused a handling-cost aversion in the domestic chick performing a binary choice task
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DOI：
10.1111/j.1460-9568.2006.05090.x
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发表时间：
2006-10-01
影响因子：
3.4
通讯作者：
Matsushima, Toshiya
中科院分区：
文献类型：
--
作者：
Aoki, Naoya;Csillag, Andras;Matsushima, Toshiya
处理成本（食物消耗的时间和/或能量成本）对选择的行为影响进行了研究，使用经过延迟食物奖励强化的操作性任务训练的家养雏鸡。当在更苛刻的条件下提供分散的芝麻时，与六粒相关的彩色提示珠（“大”和“昂贵”的奖励）相比，与一粒相关的另一粒（“小”和“不昂贵”的奖励）的选择频率逐渐降低。因此，这种选择对预期的处理成本高度敏感。双侧中茎的兴奋性毒性病变也选择性地减少了六粒的选择，而实际的成本投资（啄数和处理时间）保持不变。在一粒芝麻（“小”和“不昂贵”的奖励）和一粒大麦（或由六粒芝麻粒粘在一起的球；“大”和“不昂贵”的奖励）之间的选择没有发生显著变化，表明基于预期食物量的选择没有受到损害。另一方面，在任何试验类型中，腹侧纹状体的损伤都没有改变选择比例。操作性啄食潜伏期在一定程度上取决于食物奖励，但不受针状体或腹侧纹状体损伤的影响。翅果鞘可以帮助雏鸟克服处理成本，从而获得更多有益的食物，从而有助于觅食行为。此外，本研究结果表明腹侧纹状体和弓状体的双重分离功能作用，前者分别在旅行食物的成本和后者在处理食物的成本。
Behavioral effects of handling cost (time and/or energetic cost for food consumption) on choice were examined using domestic chicks trained in operant task reinforced by delayed food rewards. When scattered sesame was delivered in more demanding conditions, a colored cue bead associated with six grains ('large' and 'costly' reward) was chosen progressively less frequently against another bead associated with one grain ('small' and 'not costly' reward). The choice thus proved to be highly sensitive to the anticipated handling cost. Excitotoxic lesion of the bilateral arcopallium intermedium also selectively reduced the choice of the six grains, while leaving actual cost investment (number of pecks and handling time) unaltered. No significant changes occurred in choices between one grain of sesame ('small' and 'not costly' reward) and one grain of barley (or a ball composed of six sesame grains glued by starch; 'large' and 'not costly' reward), indicating that choice based on anticipated food amount was not impaired. On the other hand, lesion of the ventral striatum did not change the choice ratio in any trial types. Operant peck latencies somewhat depended on food rewards, but were not affected by lesions of the arcopallium or the ventral striatum. The arcopallium could contribute to foraging behaviors by enabling chicks to overcome the handling cost, thus gaining more beneficial food. Furthermore, the present results indicate doubly dissociated functional roles of the ventral striatum and the arcopallium, the former in the cost of traveling for food and the latter in the cost of handling food, respectively.