Visual cortex allows prediction of perceptual states during ambiguous structure-from-motion
Visual cortex allows prediction of perceptual states during ambiguous structure-from-motion
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DOI：
10.1523/jneurosci.4593-06.2007
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发表时间：
2007-01-31
影响因子：
5.3
通讯作者：
van Ee, Raymond
中科院分区：
文献类型：
--
作者：
Brouwer, Gijs Joost;van Ee, Raymond
我们研究了视网膜视皮层和运动敏感区在模糊结构运动（SFM）过程中代表视觉意识内容的作用，使用功能磁共振成像（fMRI）和多变量统计（支持向量机）。我们的研究结果表明，从背侧视觉区V3A，V4D，V7，MT+和顶叶区响应SFM的数据，感知状态的预测可以是非常准确的，但在较小程度上为其他视觉领域。预测的普遍化是可能的，因为对于明确的刺激和不同的实验设计来说，预测准确性显着优于机会。对眼球运动的详细分析表明，策略性甚至鼓励性的有益眼球运动并不是基于皮层激活的预测准确性的原因。我们的结论是，在知觉竞争，视觉意识的神经相关可以在视网膜视皮层，MT+，顶叶皮层。我们认为，特定的运动敏感神经元的组织在体素的首选方向选择性中产生可检测的偏差，从而可以预测感知状态。在知觉竞争期间，视网膜视皮层，特别是像V3A和V7这样的高层背侧区域，积极地代表视觉意识的内容。
We investigated the role of retinotopic visual cortex and motion-sensitive areas in representing the content of visual awareness during ambiguous structure-from-motion (SFM), using functional magnetic resonance imaging (fMRI) and multivariate statistics (support vector machines). Our results indicate that prediction of perceptual states can be very accurate for data taken from dorsal visual areas V3A, V4D, V7, and MT+ and for parietal areas responsive to SFM, but to a lesser extent for other visual areas. Generalization of prediction was possible, because prediction accuracy was significantly better than chance for both an unambiguous stimulus and a different experimental design. Detailed analysis of eye movements revealed that strategic and even encouraged beneficial eye movements were not the cause of the prediction accuracy based on cortical activation. We conclude that during perceptual rivalry, neural correlates of visual awareness can be found in retinotopic visual cortex, MT+, and parietal cortex. We argue that the organization of specific motion-sensitive neurons creates detectable biases in the preferred direction selectivity of voxels, allowing prediction of perceptual states. During perceptual rivalry, retinotopic visual cortex, in particular higher-tier dorsal areas like V3A and V7, actively represents the content the visual awareness.