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首页> 外文期刊>The European Journal of Neuroscience >Superior colliculus encodes visual saliency during smooth pursuit eye movements
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Superior colliculus encodes visual saliency during smooth pursuit eye movements

机译：在平稳的追踪眼球运动期间，优越的小芯片编码视觉显着性

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摘要

The saliency map has played a long-standing role in models and theories of visual attention, and it is now supported by neurobiological evidence from several cortical and subcortical brain areas. While visual saliency is computed during moments of active fixation, it is not known whether the same is true while engaged in smooth pursuit of a moving stimulus, which is very common in real-world vision. Here, we examined extrafoveal saliency coding in the superior colliculus, a midbrain area associated with attention and gaze, during smooth pursuit eye movements. We found that SC neurons from the superficial visual layers showed a robust representation of peripheral saliency evoked by a conspicuous stimulus embedded in a wide-field array of goal-irrelevant stimuli. In contrast, visuomotor neurons from the intermediate sac-cade-related layers showed a poor saliency representation, even though most of these neurons were visually responsive during smooth pursuit. These results confirm and extend previous findings that place the SCs in a unique role as a saliency map that monitors peripheral vision during foveation of stationary and now moving objects.
机译：显著性图在视觉注意的模型和理论中起到了长期的作用，现在它得到了来自大脑皮层和皮层下区域的神经生物学证据的支持。虽然视觉显著性是在主动注视的瞬间计算出来的，但我们不知道在平滑地追求运动刺激时是否也是如此，这在现实世界的视觉中非常常见。在这里，我们研究了在平稳的眼球追踪运动中，与注意力和凝视相关的中脑区域上丘的中心凹外显著性编码。我们发现，来自浅层视觉层的SC神经元表现出强烈的外周显著性表现，由嵌入目标无关刺激的广域阵列中的明显刺激引起。相比之下，来自中间囊-腔相关层的视觉运动神经元表现出较差的显著性表征，尽管这些神经元中的大多数在平滑追踪过程中具有视觉反应。这些结果证实并扩展了之前的研究结果，即在静止和移动物体的中心凹过程中，SCs作为一个显著性图发挥着独特的作用，可以监测周围视觉。

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