I'm not a neuroscientist, but I have noticed in my life that there's certainly times where stress and internal drive form a loop which interferes with sleep. Cr

I'm not a neuroscientist, but I have noticed in my life that there's certainly times where stress and internal drive form a loop which interferes with sleep. Crunch time, changes in employment, or trying to get something new off the ground with issues you don't yet know how to solve all adds up. Fight-or-Flight is a valuable response to actual life-and-death danger, but for some the brain turns too many innocuous things into saber tooth tigers.