This area is involved in making decisions, and thus directing appropriate actions. Also, this brain area is part of the brain's reward system. This system ensures that some actions are performed more often than others.
The orbitofrontal cortex is involved in planning, reasoning and making decisions. Most likely, the orbitofrontal cortex (OFC) does this by combining information from different senses. This combined package is evaluated, and possible actions are thought of. Of these, the best one is selected by looking at possible consequences (rewards and punishments) of the behavior. The action that provides the most reward will be selected by the OFC to perform.
The orbitofrontal cortex is found in the middle part of the surface at the bottom of the frontal cortex. This area lies directly behind the eye sockets. Next to the area are BA 10, BA 47 and BA 45. Much input from the OFC comes from the thalamus.
This area is also often associated with addictions and compulsive behaviors. This is because the OFC helps to release dopamine in the brain. Dopamine is a substance that has a rewarding effect. When a lot of dopamine is released during a certain action, it is likely that this action will be performed again. Repeating some actions can get out of control, and the brain then wants so much dopamine that it is very difficult to inhibit yourself from performing this particular action.
There are several tests by which you can identify patients with damage to this area:
Author: Myrthe Princen (translated by Joyce Burger)
Image: Marcel Loeffen