Spatial attention modulates sound localization in barn owls
Spatial attention modulates sound localization in barn owls
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DOI：
10.1152/jn.2001.85.2.1009
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发表时间：
2001-02-01
影响因子：
2.5
通讯作者：
Gaese, BH
中科院分区：
文献类型：
--
作者：
Johnen, A;Wagner, H;Gaese, BH
在跨通道空间线索范式下研究了注意对仓鸮声音定位行为的影响。在被提示到最可能的目标侧与视觉提示刺激，猫头鹰本地化即将到来的听觉目标刺激与头部转向声源的位置。在80%的实验中，提示刺激指向即将到来的目标刺激的一侧（有效配置），在20%的实验中，它们指向相反的一侧（无效配置）。我们发现，猫头鹰在有效试验中平均提前37.4 ms启动头部转动，即，在有效的线索刺激后，头转向的平均反应延迟减少了16%。因此，听觉刺激出现在线索侧的处理速度比刺激出现在非线索侧，表明空间选择性注意机制的影响。当猫头鹰把头转向一个有线索或没有线索的位置时，转向的角度没有什么不同。影响声音定位的其他类型的注意力，例如，不能观察到作为线索-目标延迟持续时间的函数的响应延迟的减少。本研究是首次尝试在动物模型中研究注意对声音定位的影响。
Attentional influence on sound-localization behavior of barn owls was investigated in a cross-modal spatial cuing paradigm. After being cued to the most probable target side with a visual cuing stimulus, owls localized upcoming auditory target stimuli with a head turn toward the position of the sound source. In 80% of the trials, cuing stimuli pointed toward the side of the upcoming target stimulus (valid configuration), and in 20% they pointed toward the opposite side (invalid configuration). We found that owls initiated the head turns by a mean of 37.4 ms earlier in valid trials, i.e., mean response latencies of head turns were reduced by 16% after a valid cuing stimulus. Thus auditory stimuli appearing at the cued side were processed faster than stimuli appearing at the uncued side, indicating the influence of a spatial-selective attention mechanism. Turning angles were not different when owls turned their head toward a cued or an uncued location. Other types of attention influencing sound localization, e.g., a reduction of response latency as a function of the duration of cue-target delay, could not be observed. This study is the first attempt to investigate attentional influences on sound localization in an animal model.