Visual perceptual learning of a primitive feature in human V1/V2 as a result of unconscious processing, revealed by Decoded fMRI Neurofeedback (DecNef)
Visual perceptual learning of a primitive feature in human V1/V2 as a result of unconscious processing, revealed by Decoded fMRI Neurofeedback (DecNef)
复制标题
解码 fMRI 神经反馈 (DecNef) 揭示了无意识处理导致的人类 V1/V2 原始特征的视觉感知学习
DOI：
10.1101/2020.11.30.405209
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Watanabe Takeo
中科院分区：
文献类型：
--
作者：
Wang Zhiyan;Tamaki Masako;Shibata Kazuhisa;Worden Michael S.;Yamada Takashi;Kawato Mitsuo;Sasaki Yuka;Watanabe Takeo
虽然许多研究表明，视觉感知学习（VPL）发生的结果，暴露于视觉功能在一个任务无关的方式，底层的神经机制知之甚少。在先前的心理物理学研究中（Watanabe等人，2002），受试者被反复暴露于任务无关的Sekloven运动显示，诱导的感知不仅是局部运动，而且是全局运动的局部运动矢量的时空平均值的方向上移动。由于这种暴露，受试者只增强了他们对局部运动方向的敏感性，这表明处理局部运动的早期视觉区域（V1/V2）参与了与任务无关的VPL。然而，这一假设从未直接使用神经元记录进行过测试。在这里，我们采用了解码的神经反馈技术（DecNef），使用功能性磁共振成像在人类受试者检查参与的早期视觉区（V1/V2）在任务无关的VPL的局部运动内的Seketon运动显示。在DecNef训练期间，受试者被训练以诱导V1/V2中的活动模式，这些活动模式类似于由实际呈现的Seketron运动显示所诱发的活动模式。DecNef训练既不实际呈现显示，也不使受试者意识到实验的目的。实验结束后，受试者报告说，他们在DecNef训练期间既没有感知也没有想象训练过的动作。作为DecNef训练的结果，受试者增加了他们对局部运动方向的敏感性，但不是特别对全局运动方向的敏感性。与DecNef训练相关的神经元变化仅限于V1/V2。这些结果表明，V1/V2参与了基于任务无关的局部运动VPL。
Although numerous studies have shown that visual perceptual learning (VPL) occurs as a result of exposure to a visual feature in a task-irrelevant manner, the underlying neural mechanism is poorly understood. In a previous psychophysical study (Watanabe et al., 2002), subjects were repeatedly exposed to a task-irrelevant Sekuler motion display that induced the perception of not only the local motions, but also a global motionmoving in the direction of the spatiotemporal average of the local motion vectors. As a result of this exposure, subjects enhanced their sensitivity only to the local moving directions, suggesting that early visual areas (V1/V2) that process local motions are involved in task-irrelevant VPL. However, this hypothesis has never been tested directly using neuronal recordings. Here, we employed a decoded neurofeedback technique (DecNef) using functional magnetic resonance imaging in human subjects to examine the involvement of early visual areas (V1/V2) in task-irrelevant VPL of local motion within a Sekuler motion display. During the DecNef training, subjects were trained to induce the activity patterns in V1/V2 that were similar to those evoked by the actual presentation of the Sekuler motion display. The DecNef training was conducted with neither the actual presentation of the display nor the subjects’ awareness of the purpose of the experiment. After the experiment, subjects reported that they neither perceived nor imagined the trained motion during the DecNef training. As a result of DecNef training, subjects increased their sensitivity to the local motion directions, but not specifically to the global motion direction. Neuronal changes related to DecNef training were confined to V1/V2. These results suggest that V1/V2 are involved in exposure-based task-irrelevant VPL of local motion.
登录
查看更多内容
影响因子：
24.8
作者：
Watanabe T;Sasaki Y
通讯作者：
Sasaki Y
影响因子：
16.6
作者：
Arsenault, John T.;Vanduffel, Wim
通讯作者：
Vanduffel, Wim
影响因子：
3.7
作者：
Pascucci D;Mastropasqua T;Turatto M
通讯作者：
Turatto M
影响因子：
5.7
作者：
Toda, Akihiro;Imamizu, Hiroshi;Sato, Masa-aki
通讯作者：
Sato, Masa-aki
影响因子：
16.2
作者：
Miyawaki, Yoichi;Uchida, Hajime;Kamitani, Yukiyasu
通讯作者：
Kamitani, Yukiyasu