Imprinting modulates processing of visual information in the visual wulst of chicks
Imprinting modulates processing of visual information in the visual wulst of chicks
复制标题
DOI：
10.1186/1471-2202-7-75
复制
发表时间：
2006-11-14
期刊：
影响因子：
2.4
通讯作者：
Ohki-Hamazaki, Hiroko
中科院分区：
文献类型：
--
作者：
Maekawa, Fumihiko;Komine, Okiru;Ohki-Hamazaki, Hiroko
背景：印记行为是早熟鸟类学习记忆的一种形式。结果：与哺乳动物视皮层功能相似的视觉皮层损伤，可引起视觉印记行为的顺行性遗忘。由于物体的颜色是印记的重要线索之一，我们研究了视觉wulst中的颜色信息处理。内在的光学信号从视觉wulst检测在早期posthatch期间和红色，绿色，蓝色的响应的峰值区域在空间上组织从尾部到鼻区域在黑暗中饲养的小鸡。这种颜色识别的空间表征表现出可塑性变化，并且沿着视觉前后轴的反应模式沿着会根据小鸡被印记的颜色而改变。这些结果表明，离丘脑途径是关键的学习印记刺激和视觉wulst显示学习-相关的可塑性，并且可以将指示印记刺激的颜色的经处理的视觉信息传递到记忆存储区域，例如，在一个实施例中，中间的中皮层
Background: Imprinting behavior is one form of learning and memory in precocial birds. With the aim of elucidating of the neural basis for visual imprinting, we focused on visual information processing.Results: A lesion in the visual wulst, which is similar functionally to the mammalian visual cortex, caused anterograde amnesia in visual imprinting behavior. Since the color of an object was one of the important cues for imprinting, we investigated color information processing in the visual wulst. Intrinsic optical signals from the visual wulst were detected in the early posthatch period and the peak regions of responses to red, green, and blue were spatially organized from the caudal to the nasal regions in dark-reared chicks. This spatial representation of color recognition showed plastic changes, and the response pattern along the antero-posterior axis of the visual wulst altered according to the color the chick was imprinted to.Conclusion: These results indicate that the thalamofugal pathway is critical for learning the imprinting stimulus and that the visual wulst shows learning-related plasticity and may relay processed visual information to indicate the color of the imprint stimulus to the memory storage region, e. g., the intermediate medial mesopallium.