About Odessa Regional Medical Center Odessa Regional Medical Center is a Hospital in Odessa, TX.
The most important reward pathway in brain is the mesolimbic dopamine system. This circuit (VTA-NAc) is a key detector of a rewarding stimulus.
Scientists believed for a while that the reward system could tell us all we need to know about addiction and how it manifests itself throughout the brain. However, tolerance builds and the euphoric responses to these drugs begin to wane.