The Brain’s Hidden Switch That Helps You Learn from Mistakes

Understanding these brain circuits could lead to better treatment of neurological conditions

Illustration of a brain in orange shining through an outline of a head on an abstract blue background

The following is a summary of a story that originally appeared on School of Medicine.

How does the brain learn from mistakes? A new Duke study reveals a hidden circuit that helps control the learning process.

Court Hull, associate professor of neurobiology at Duke University School of Medicine and co-senior author of the study, was looking to tease out how certain nerve pathways seemed to be in charge of both helping and hindering learning. The federally funded research focuses on the cerebellum, a region at the bottom of the brain responsible for coordinating movement and learning motor skills. When a movement goes wrong, specialized nerve fibers called climbing fibers send powerful “error signals” that trigger changes in brain connections, allowing the brain to adjust and improve over time.

The team found that the brain doesn’t just send error signals, it also carefully controls when those signals can take effect.

The effect is strongest when multiple signals arrive at once, such as when one trips or reacts to a loud noise. These moments help trigger stronger learning by temporarily allowing more signaling.

“The key is having ‘brakes’ that can control learning,” said lead author and Duke graduate student Fernando Santos Valencia. “The brain opens a window for learning when needed and closes it when it’s not.”

The findings could have broader implications. Researchers say understanding this circuit could eventually help pinpoint what goes wrong in neurological conditions like ataxia and autism spectrum disorder – and how to better treat them.

Learn more about how federally funded Duke Research Saves Lives in the full story on School of Medicine.