In the OCD part of my illness,they have found out various things with the MRI.
This is complicated,and I don't know how to explain it. Here are what a few studies have said....

There are MRI studies that have been done with various mental health issues. Using a MRI in a study,obsessive compulsive disorder sufferers had less gray matter in the areas of their brain associated with suppressing responses.
Those researchers concluded they had found substantial evidence that a variation in "motor inhibitory control" is correlated with grey matter density changes in parts of the brain.

According to another study with people with OCD,lesions found in the basil ganglia could account for their OCD behaviors if the pathway is dysregulated.

This is complicated,and I don't have the scholastic ability to explain this. The only thing that I can say is that people with OCD have problems in the back area of the brain,called the Basal Ganglia. Lesions,and grey matter density changes in parts of the brain have been seen through these tests.

Please forgive me for the information overload on OCD. I think that more of us in the Bipolar forum have a form of obsessive brain activity in relation to the other mental health issues that we suffer. BF