子视觉皮层中细胞的反应在人工视瘤的感知填充过程中
P De Weerd1, R Gattass, R Desimone
1Laboratory of Psychology and Psychopathology, NIMH, Bethesda, Maryland 20892, USA.
Nature
|October 26, 1995
概括
大脑填补缺少的视觉信息,如视觉盲点或视觉洞. 这项研究表明,子的神经活动反映了这种感知填充过程.
科学领域:
- 神经科学是一个神经科学.
- 视觉感知 视觉感知 视觉感知
背景情况:
- 人类的视觉系统可以填补缺少的信息,例如自然盲点 (scotomas) 或通过查看纹理场中的洞来创建的人工盲点.
- 这种被称为感知填充的现象表明,大脑积极构建视觉现实,而不是被动地接收它.
研究的目的:
- 调查视觉系统中潜在的感知填充的神经机制.
- 为了确定大脑中的神经活动是否会动态变化,以弥补缺失的视觉信息.
主要方法:
- 子被训练,以观看纹理领域的人工scotomas (洞).
- 从外层视觉神经元中记录了神经活动,其受体场覆盖了这些洞.
- 对神经元反应的时间过程进行了分析,并与人类感知数据进行了比较.
主要成果:
- 外层视觉神经元在观察纹理场中的洞时显示出逐渐增加的反应.
- 神经元活动达到与观看一个没有孔的完整纹理场相比的水平.
- 神经活动增加的时间过程与人类观察员报告的感知填充相平行.
结论:
- 外层视觉皮层中的神经处理有助于感知填充.
- 神经元反应的动态变化表明大脑积极填补缺少的视觉信息的机制.
- 这项研究提供了关于视觉系统如何补偿视瘤和构建连续视觉体验的见解.
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