By Susan Orloff OTR/L/FAOTA
Spontaneous brain activity formerly thought to be “white noise” measurably changes after a person learns a new task, researchers at Washington University School of Medicine in St. Louis and the University of Chieti, Italy, [Proceedings of the National Academy of Sciences, 106:17558-17563].
Scientists also report that the degree of change reflects how well subjects have learned to perform the task.
“Recent studies have shown that in the absence of any overt behavior, and even during sleep or anesthesia, the brain’s spontaneous activity is not random, but organized in patterns of correlated activity that occur in anatomically and functionally connected regions,” stated senior author Maurizio Corbetta, MD, Norman J. Stupp Professor of Neurology. “The reasons behind the spontaneous activity patterns remain mysterious, but we have now shown that learning causes small changes in those patterns, and that these changes are behaviorally important.”