#mental-simulation

#mental-simulation

Neuroscientists have a name for the brain network that fires up when you're not focused on an external task: the default mode network, or DMN. It's the constellation of regions - the medial prefrontal cortex, posterior cingulate cortex, and angular gyrus among them - that hums to life when you daydream, reflect on yourself, or think about other people's mental states.

Studies show that people with high fluid intelligence can process multiple "what if" scenarios concurrently, helping them see ahead, identify concealed dangers, and plan their actions. This mode of thinking requires a lot of working memory because the brain isn't looping idly; it's stress-testing every single possibility that comes to mind. This might be why these people seem to be frequently lost in their thoughts, even when they're alone.