Tanner Jacob, Faskowitz Joshua, Kennedy Daniel P, Betzel Richard F
Luddy School of Informatics, Computing, and Engineering.
Cognitive Science Program.
bioRxiv. 2024 Aug 6:2024.08.02.606380. doi: 10.1101/2024.08.02.606380.
How does the human brain respond to novelty? Here, we address this question using fMRI data wherein human participants watch the same movie scene four times. On the first viewing, this movie scene is novel, and on later viewings it is not. We find that brain activity is lower-dimensional in response to novelty. At a finer scale, we find that this reduction in the dimensionality of brain activity is the result of increased coupling in specific brain systems, most specifically within and between the control and dorsal attention systems. Additionally, we found that novelty induced an increase in between-subject synchronization of brain activity in the same brain systems. We also find evidence that adaptation to novelty, herein operationalized as the difference between baseline coupling and novelty-response coupling, is related to fluid intelligence. Finally, using separately collected out-of-sample data, we find that the above results may be linked to psychological arousal.
人类大脑如何对新事物做出反应？在此，我们使用功能磁共振成像（fMRI）数据来解决这个问题，在该数据中，人类参与者观看同一个电影场景四次。第一次观看时，这个电影场景是新颖的，而在随后的观看中则不是。我们发现，大脑活动在对新事物的反应中维度更低。在更精细的尺度上，我们发现大脑活动维度的这种降低是特定脑系统中耦合增加的结果，最显著的是在控制和背侧注意系统内部以及它们之间。此外，我们发现新事物会导致同一脑系统中大脑活动的受试者间同步增加。我们还发现证据表明，对新事物的适应（在此定义为基线耦合与新事物反应耦合之间的差异）与流体智力有关。最后，使用单独收集的样本外数据，我们发现上述结果可能与心理唤醒有关。
