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抑制视觉皮层的反信号消除了注意力调节

Samantha R Debes¹, Valentin Dragoi^1,2

¹Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas at Houston, Houston, TX 77030, USA.

Science (New York, N.Y.)

|February 2, 2023

概括

从V4到V1的上下注意力信号增强了视觉感知. 这些反连接的失活会损害神经反应和准确性,

科学领域:

神经科学
视觉感知
认知神经科学

背景情况:

通过提高神经编码来增强感官感知.
皮质反预测被假设是从上向下传递注意力信号.
对于反对注意力的作用的因果证据是缺乏的.

研究的目的:

试验皮质反投影对视觉编码的影响.
研究从V4到V1的反对视觉注意力的作用.

主要方法:

使用病毒工具追踪和选择性地使子中的V4到V1反投影无效.
子在神经记录过程中执行视觉空间注意力任务.
分析了反失活对V1和V4单细胞反应和神经群体准确性的影响.

主要成果:

在V1中禁用V4反终端减少了神经元响应增益和受损的群体编码精度.
这些效应取决于层次,主要是表面的V1层.
观察到的效应传播到下游区域V4.

结论:

皮质反,特别是从V4到V1,在注意力过程中因果增强视觉感官编码.
注意力通过皮质皮层反强度的特定变化来调节视觉处理.
这为上下反在注意力介导的感知中的作用提供了直接证据.

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