? when the behavior is concsistent it means there's an underlying pattern. occasionally it's something like hypoglycemia, but it's difficult to get that to such a degree. the varying glucose levels push/pull different hormones and transmitters. Think of a bath tub that changes temp and consistency. the occupants mood/experience would shift with the changes.

Another way to do it is to have a self limiting belief that generates to everything. Here's an example- a caveman watches a friend pick up a coral snake. It's got pretty colors. 15 minutes after the bite the friend dies. 16 minutes after the bite the caveman has a fear of coral snakes. The next time he sees a snake, maybe a python or something but not a coral snake, his brain triggers a phobic response. that's called learning.

the problem with us and learning is that the brain learns negative things as well as positive things. It doesn't descriminate. So, when it comes to generating a self limiting belief the brain can generate that feeling everywhere. That's how you get some agoraphobics- peopole who are afraid of leaving their house...

these kinds of things aren't as impossible to change as psychiatry and psychology think. For one thing- they often only use methods they learned in school (that don't usually work), and they only teach methods they condone (which don't usually work). I laugh to myself when they say they have a "practice" or are practicing.

Anyhow, neural researchers, like with neuroplasticity, could probably rewire the brain if they got creative. There are some other methods but don't have the tangible studies of most research.