Submitted by Marnia on Fri, 2010-08-06 09:42
This adds another piece to the puzzle. If you happen to have a brain that doesn't "turn down" dopamine well, then you'll get a more demanding "buzz" when it shoots up. This can make you impulsive, and more susceptible to thrill seeking.
What's not discussed in this research is whether - independent of genetic makeup - behavior can also cause this decrease in autoreceptors. By behavior, I'm thinking of gorging on superstimulating versions of natural reinforcers like junk food, porn, vibrators and so on.
