“Methamphetamine abusers were worse at stopping themselves on these very simple tasks and their ability to stop themselves related to how much craving they had for the drug,” he says. The craving seemed to be interfering with the brain’s ability to change a plan it knows is a bad idea.
Ultimately, understanding the brain’s stop system may help us understand the success of our species, Poldrack says.
“The thing that humans do better than any other species is adapt ourselves to the world when things change,” he says.
Poldrack agrees with most of what the Neuron study found, though he’d like to see a larger study before concluding that all the brain areas interact the way Courtney thinks they do.