The reward system is collection of brain structures and neural pathways that are responsible for reward related cognition, including associative learning , motivation and wanting, craving and pleasure. These areas from the brain are activated with the process of food, sex or religion. That means, eating meals, have sex and have a spiritual experience stimuli the pleasure center. This develop a good attitude and determination to receive positive reinforcement.
Location of the reward system.
It is located in the front of the brain the prefrontal media cortex area, just behind the forehead. That control of abstract thinking and thought analysis, the social behavior. The accumben nucleus is a region in the basal forebrain rostral to the preoptic area of the hypothalamus. As a whole the nucleus accumben has a significant role in the cognitive processing of aversion, motivation reward (pleasure and positive reinforcement).
There is a research in a religious group of 20 persons; that show output of wellness and pleasure doing the same three actitivies (eat, sex and religion). That demonstrated the functionality of the reward system.
The reward pathway.
This area of reward and reinforcement. The abuse of drugs induce neuroplasticity in the natural reward pathway, specially the nucleus accumbens (NAc) thereby causing development. GABA is one of the main neurotransmisor.