Rat brains also have a default mode network
Proceedings of the National Academy of Sciences February 21, 2012 Hanbing Lu, Qihong Zou, Hong Gu et al. 627 citations
A brain network called the default mode network (DMN), previously studied mainly in humans and primates, also exists in rats. The DMN in rats is broadly similar to that in nonhuman primates and humans, suggesting it is a fundamental feature of mammalian brains. The network appears to integrate sensory and emotional information to guide behavior in anticipation of changing environmental conditions, despite the distinct evolutionary paths of rodents and primates. The findings help clarify the DMN's core functions, which remain poorly understood in humans.