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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Effects of attention on the processing of motion in macaque middle temporal and medial superior temporal visual cortical areas.
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Effects of attention on the processing of motion in macaque middle temporal and medial superior temporal visual cortical areas.

机译：注意对猕猴颞中内侧和颞上内侧视觉皮层区域运动的影响。

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摘要

The visual system is continually inundated with information received by the eyes. Only a fraction of this information appears to reach visual awareness. This process of selection is one of the functions ascribed to visual attention. Although many studies have investigated the role of attention in shaping neuronal representations in cortical areas, few have focused on attentional modulation of neuronal signals related to visual motion. We recorded from 89 direction-selective neurons in middle temporal (MT) and medial superior temporal (MST) visual cortical areas of two macaque monkeys using identical sensory stimulation under various attentional conditions. Neural responses in both areas were greatly influenced by attention. When attention was directed to a stimulus inside the receptive field of a neuron, responses in MT and MST were enhanced an average of 20 and 40% compared with a condition in which attention was directed outside the receptive field. Even stronger average enhancements (70% in MT and 100% in MST) were observed when attention was switched from a stimulus moving in the nonpreferred direction inside the receptive field to another stimulus in the receptive field that was moving in the preferred direction. These findings show that attention modulates motion processing from stages early in the dorsal visual pathway by selectively enhancing the representation of attended stimuli and simultaneously reducing the influence of unattended stimuli.
机译：视觉系统不断被眼睛接收的信息淹没。这些信息中只有一小部分似乎可以达到视觉感知。该选择过程是赋予视觉注意力的功能之一。尽管许多研究已经研究了注意力在塑造皮层区域神经元表征中的作用，但很少有人关注与视觉运动有关的神经元信号的注意力调节。我们在不同的注意条件下，使用相同的感官刺激，从两只猕猴的中颞（MT）和内侧颞上（MST）视觉皮层区域中的89个方向选择神经元中进行了记录。这两个领域的神经反应都受到注意力的极大影响。当注意力集中在神经元感受野内的刺激时，与将注意力集中在感受野外的情况相比，MT和MST的反应平均提高了20％和40％。当将注意力从在感受野内沿非优选方向移动的刺激切换到在偏好野内移动的另一刺激时，观察到甚至更强的平均增强（MT为70％，MST为100％）。这些发现表明，注意力通过选择性增强参与刺激的表示并同时减少无人参与刺激的影响来调节背侧视觉通路早期阶段的运动处理。

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