The Irrational Part of the Brain?

Or maybe the most irrational part of the brain. Pacific Standard:

The insula is a small part of the brain, but it packs an emotional punch. It helps us feel some of our most powerful feelings, including love, anxiety, and hunger. Patients who damage their insula can experience these emotions and cravings in unusual ways. And that makes them highly sought after for trials by scientists—researchers who want to understand how this slice of the neuron pie affects our daily lives. High-profile research published seven years ago, for example, showed that these patients had an easier time than others in kicking cigarette addictions.
Neuroscientists also want to know which parts of the brain are responsible for the gambler’s fallacy. That’s the bank account-draining delusion that the outcome of one spin of a roulette wheel can affect the outcome of the next. This fallacy can keep us optimistically glued to our sticky casino chair. It convinces us that we can enrich ourselves by throwing chips on one color or another as the croupier grabs the roulette wheel—we think we’re seeing a pattern where there is nothing but randomness. The fallacy also misleads us into mistaking a near-miss on a slot machine as a sign that we’re close to hitting a jackpot.
British and American researchers simulated gambling games with patients whose brains had been injured in different ways. They also ran the same experiments with neurologically healthy subjects. They measured how outcomes of roulette and slot machine spins affected gambling decisions, such as whether a mock gambler was motivated to try their luck with another round.
They found that insula-damaged patients had a wallet-shielding immunity to the gambler’s fallacy—one that was lacking in everybody else.
When playing a slot machine, a near miss made most of the test subjects want to try again. This irrational response was “selectively absent in the insula group,” the scientists write in a paper published this week in the Proceedings of the National Academy of Sciences.
And when the ball in the roulette wheel landed on the same color several times in a row, most of the gamblers threw their hypothetical chips onto the other color, mistakenly thinking that color’s time was overdue. Again, “the insula group did not manifest this avoidance of recent outcomes,” the researchers write.

Hey, that bet-on-what-didn't-come-up strategy worked like a charm once (yeah, just once) for me on Chuck-A-Luck at the parish festival.  I think I ended up $25 ahead on $1 bets.  That was on a game with three dice, though, and not on the wheel that mainly features doubles and triples.  I'm not very good at probability math, but I figured you have pretty much even odds with the dice.  I guess I'm not really surprised the part of the brain that falls in love is also the part that makes us suckers for house games.  You kind of have to be a romantic fool to think you are going to beat the house (except that one time).