Department of Vision & Cognition, Netherlands Institute for Neuroscience, Meibergdreef 47, 1105 Amsterdam, the Netherlands.
Department of Vision & Cognition, Netherlands Institute for Neuroscience, Meibergdreef 47, 1105 Amsterdam, the Netherlands; Psychiatry Department, Academic Medical Center, University of Amsterdam, Nieuwe Achtergracht 129-B, 1018 Amsterdam, the Netherlands; Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, VU University, De Boelelaan 1085, 1081 Amsterdam, the Netherlands.
Curr Biol. 2021 Dec 20;31(24):5401-5414.e4. doi: 10.1016/j.cub.2021.09.052. Epub 2021 Oct 14.
After a briefly presented visual stimulus disappears, observers retain a detailed representation of this stimulus for a short period of time. This sensory storage is called iconic memory. We measured iconic memory in the perception of monkeys and its neuronal correlates in the primary visual cortex (area V1). We determined how many milliseconds extra viewing time iconic memory is worth and how it decays by varying the duration of a brief stimulus and the timing of a mask. The V1 activity that persists after the disappearance of a stimulus predicted accuracy, with a time course resembling the worth and decay of iconic memory. Finally, we examined how iconic memory interacts with attention. A cue presented after the stimulus disappears boosts attentional influences pertaining to a relevant part of the stimulus but only if it appears before iconic memory decayed. Our results relate iconic memory to neuronal activity in early visual cortex.
在短暂呈现视觉刺激后，观察者在短时间内保留对该刺激的详细表示。这种感觉储存称为图像记忆。我们在猴子的感知中测量了图像记忆及其在初级视觉皮层（V1 区）中的神经元相关性。我们通过改变短暂刺激的持续时间和掩蔽的时间来确定图像记忆额外值得多少毫秒的观看时间以及它如何衰减。在刺激消失后持续存在的 V1 活动可以预测准确性，其时间过程类似于图像记忆的价值和衰减。最后，我们研究了图像记忆如何与注意力相互作用。在刺激消失后呈现的提示会增强与刺激相关部分的注意力影响，但前提是它出现在图像记忆衰减之前。我们的结果将图像记忆与早期视觉皮层中的神经元活动联系起来。
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