The spatial scale of perceptual memory in ambiguous figure perception
The spatial scale of perceptual memory in ambiguous figure perception
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DOI：
10.1167/9.13.16
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Graf, Erich W.
中科院分区：
文献类型：
--
作者：
Knapen, Tomas;Brascamp, Jan;Graf, Erich W.
模糊的视觉刺激突出了视觉的建设性本质：感知在不变输入的两种似是而非的解释之间交替。然而，当先前看到的模糊刺激再次出现时，其先前的感知几乎完全决定了新的解释；内存消除了输入的歧义。在这里，我们研究了这种感知记忆的空间特性，考虑到整个视野中感知偏好的强各向异性。与之前的发现相反，我们表明知觉记忆并不局限于它被灌输的位置。相反，它会扩散到视野的不连续区域，在更远的距离上消失。此外，这种知觉记忆的传播发生在一个与视网膜表面相连的参照系中。这些结果将知觉记忆的神经位点置于视网膜组织的感觉皮质区域，这意味着知觉记忆在促进自然、动态环境中稳定视觉方面的更广泛功能。
Ambiguous visual stimuli highlight the constructive nature of vision: perception alternates between two plausible interpretations of unchanging input. However, when a previously viewed ambiguous stimulus reappears, its earlier perception almost entirely determines the new interpretation; memory disambiguates the input. Here, we investigate the spatial properties of this perceptual memory, taking into account strong anisotropies in percept preference across the visual field. Countering previous findings, we show that perceptual memory is not confined to the location in which it was instilled. Rather, it spreads to noncontiguous regions of the visual field, falling off at larger distances. Furthermore, this spread of perceptual memory takes place in a frame of reference that is tied to the surface of the retina. These results place the neural locus of perceptual memory in retinotopically organized sensory cortical areas, with implications for the wider function of perceptual memory in facilitating stable vision in natural, dynamic environments.