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Cortical area MT and the perception of stereoscopic depth.

机译:皮质区域MT和立体深度的感知。

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摘要

Stereopsis is the perception of depth based on small positional differences between images formed on the two retinae (known as binocular disparity). Neurons that respond selectively to binocular disparity were first described three decades ago, and have since been observed in many visual areas of the primate brain, including V1, V2, V3, MT and MST. Although disparity-selective neurons are thought to form the neural substrate for stereopsis, the mere existence of disparity-selective neurons does not guarantee that they contribute to stereoscopic depth perception. Some disparity-selective neurons may play other roles, such as guiding vergence eye movements. Thus, the roles of different visual areas in stereopsis remain poorly defined. Here we show that visual area MT is important in stereoscopic vision: electrical stimulation of clusters of disparity-selective MT neurons can bias perceptual judgements of depth, and the bias is predictable from the disparity preference of neurons at the stimulation site. These results show that behaviourally relevant signals concerning stereoscopic depth are present in MT.
机译:立体视是基于在两个视网膜上形成的图像之间的较小位置差异(称为双眼视差)而对深度的感知。选择性地对双眼视差做出反应的神经元是在三十年前首次描述的,此后在灵长类动物大脑的许多视觉区域(包括V1,V2,V3,MT和MST)中都已观察到。尽管视差选择性神经元被认为是形成立体视的神经基质,但视差选择性神经元的存在并不能保证它们有助于立体深度感知。某些视差选择性神经元可能还扮演其他角色,例如引导发散眼球运动。因此,立体视觉中不同视觉区域的角色仍然定义不清。在这里,我们显示了视觉区域MT在立体视觉中很重要:差异选择性MT神经元簇的电刺激可以使深度的感知判断产生偏差,并且可以根据刺激部位神经元的差异偏好来预测偏差。这些结果表明,在MT中存在与立体深度有关的行为相关信号。

著录项

  • 来源
    《Nature》 |1998年第6694期|P.677-680|共4页
  • 作者单位

    Howard Hughes Medical Institute and Department of Neurobiology, Stanford University School of Medicine, California 94305, USA.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

    Depth Perception; Visual Cortex; 深度知觉; 视皮质;

    机译:Depth Perception;Visual Cortex;深度知觉;视皮质;
  • 入库时间 2022-08-18 00:57:43

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