Department of Mathematics, Western University, London, ON, Canada.
Brain and Mind Institute, Western University, London, ON, Canada.
Nat Commun. 2023 Jun 9;14(1):3409. doi: 10.1038/s41467-023-39076-2.
Recent analyses have found waves of neural activity traveling across entire visual cortical areas in awake animals. These traveling waves modulate the excitability of local networks and perceptual sensitivity. The general computational role of these spatiotemporal patterns in the visual system, however, remains unclear. Here, we hypothesize that traveling waves endow the visual system with the capacity to predict complex and naturalistic inputs. We present a network model whose connections can be rapidly and efficiently trained to predict individual natural movies. After training, a few input frames from a movie trigger complex wave patterns that drive accurate predictions many frames into the future solely from the network's connections. When the recurrent connections that drive waves are randomly shuffled, both traveling waves and the ability to predict are eliminated. These results suggest traveling waves may play an essential computational role in the visual system by embedding continuous spatiotemporal structures over spatial maps.
最近的分析发现,在清醒动物的整个视觉皮层区域中,存在着一波波的神经活动。这些传播波调节着局部网络的兴奋性和感知敏感性。然而,这些时空模式在视觉系统中的一般计算作用仍然不清楚。在这里,我们假设传播波赋予了视觉系统预测复杂和自然输入的能力。我们提出了一个网络模型,其连接可以快速有效地训练来预测单个自然电影。在训练后,电影中的几个输入帧会触发复杂的波模式,仅从网络的连接就可以准确地预测未来的许多帧。当驱动波的递归连接被随机打乱时,传播波和预测能力都会被消除。这些结果表明,传播波可能通过在空间图谱上嵌入连续的时空结构,在视觉系统中发挥着重要的计算作用。