some page about OCD and dopamine suggests that people have some problem with cingulate gyrus

and concludes what I already know, that people to function need to be without disturbing things and with energy.

disturbing things are like: without illnesses that remained about themselves, or with enough and not too much and correct brain amino acids to compensate the loss of neurotransmitters because of illness.
and go to the toilet on time.
and have enough sleep.

also, people hungry an have no energy.

and if any of this wrong dopamine is like depletes for reminding about the problem, and body needs dopamine to make moves. so people stuck and not make changes and not move. probably cingulate gyrus needs some dopamine to shift attention. research about food and OCD interesting website