| 1 | The reinforcement or reward happens almost entirely because of dopamine. | |
| 2 | The brain decreases its ability to respond to dopamine signals (desensitization). | |
| 3 | Much of this deep brain circuit runs on the hormone dopamine. | |
| 4 | All drugs of abuse stimulate the release of the neurotransmitter dopamine. | |
| 5 | If so, you can thank the molecule dopamine for those shudders of delight. |