Brain Patterns Predict Mistakes

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About 400 rounds of the flanker task exercise were conducted, and an analysis of fMRI brain scans taken during the test revealed that prior to the commission of an error, the brain launched two simultaneous activities in two distinct brain regions.

The first site of activity was the frontal lobe of the brain, which controls cognition and working memory. A boost in this region's activity usually occurs to optimize a person's ability to maintain and complete tasks. However, before making of a mistake, this area was found to gradually ratchet down its activity.

At the same time as frontal lobe action decreased, activity actually increased in a second grouping of several regions in the back of the brain, known as the "Default Mode Network" (DMN). In this particular region, an increase in activity is usually linked to a resting or relaxed state of mind.

The twin brain actions were found to initiate at least six seconds before a mistake took place, and as early as 30 seconds prior to an error.

Though Eichele and his team had tallied an 8 percent to 9 percent overall error rate in the flanker test, they stressed that not all the committed errors were linked to such synchronized brain patterns. However, when the up/down regional sequencing unfolded, it appeared to raise the risk for making an error by 50 percent.

"This pattern is not the sole causal factor for mistakes," said Eichele. "But it's a contributing factor, that might relate to the brain being tired and needing a break. For now, we're continuing our research. But you can already imagine that some day we might be able to measure this phenomenon in people as they go along performing real-world tasks, using mobile and wireless EEG devices, to measure the brain's electrical activity and predict errors before they happen.

"But that's way down the road," he added. "Five, ten, fifteen years down the road."

H. Elliot Albers, director of the Center for Behavioral Neuroscience at Georgia State University in Atlanta, described the findings as "very interesting."

"I think it offers possibilities for the future," he said, "in terms of understanding how the brain either recognizes errors it's about to make or how it's going to cause mistakes in advance, if in fact the patterns are causative. And, yes, understanding all of this very well might lead to safety applications in the future. But, I agree, that's way down the road."

More information

For more on how the brain works, visit the National Institute of Neurological Disorders and Stroke.