Why do some people become more aggressive when they are tired? I've been thinking about this question for a few days and my 'hypothesis' is that the neural activity in the prefrontal cortex lessens as the brain prioritises the other more primitive parts of the brain. Is it also so that the amygdala becomes more active when tired for some reason?
I've tried to search for answers on Google but can't find any satisfying ones. Optimally, I'd like to see brain scans and have them explained, but maybe that's asking for too much.