Adaptation of barn owl localization system with spike timing dependent plasticity
Adaptation of barn owl localization system with spike timing dependent plasticity
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DOI：
10.1109/ijcnn.2008.4633782
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
J. Huo;A. Murray;L. Smith;Zhijun Yang
中科院分区：
文献类型：
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作者：
J. Huo;A. Murray;L. Smith;Zhijun Yang
仓鸮的上级丘整合了视觉和听觉定位线索，从而定位所见的物体。这些线索形成视觉和听觉地图，因此视觉和听觉地图之间的对齐对于精确定位猎物行为非常重要。失明或佩戴棱镜可能会干扰这种排列。经过几周的训练，幼年仓鸮可以调整它的听觉地图来适应这种不匹配。在这里，我们调查这个过程中，通过建立一个计算模型的听觉和视觉整合地图调整在深上级丘。这种适应是基于由抑制网络指导的活动依赖性轴突发育。在抑制网络中，抑制的强度是由尖峰时间依赖可塑性（STDP）来调节的。模拟结果与生物学实验一致，支持STDP参与感觉地图对齐的想法。该模型的系统提供了一种新的机制，能够消除视觉和听觉地图整合的差异。
To localize a seen object, the superior colliculus of the barn owl integrates the visual and auditory localization cues which are accessed from the sensory system of the brain. These cues are formed as visual and auditory maps, thus the alignment between visual and auditory maps is very important for accurate localization in prey behavior. Blindness or prism wearing may disturb this alignment. The juvenile barn owl could adapt its auditory map to this mismatch after several weeks training. Here we investigate this process by building a computational model of auditory and visual integration with map adjustment in the deep superior colliculus. The adaptation is based on activity dependent axon developing which is instructed by an inhibitory network. In the inhibitory network, the strength of the inhibition is adjusted by spike timing dependent plasticity(STDP). The simulation results are in line with the biological experiment and support the idea that the STDP is involved in the alignment of sensory maps. The system of the model provides a new mechanism capable of eliminating the disparity in visual and auditory map integration.