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Researchers capture wave of brain activity linked to anticipation
Date:2/26/2009

WASHINGTON, D.C. Neuroscientists at Georgetown University Medical Center have, for the first time, shown what brain activity looks like when someone anticipates an action or sensory input which soon follows.

In the February 25 issue of the Journal of Neuroscience, they say this neural clairvoyance involves strong activity in areas of the brain responsible for preparing the body to move.

The findings were made by using functional magnetic resonance imaging (fMRI) in a group of student volunteers who brought with them favorite music CDs. The scientists examined brain images during the silence between songs, and found it brimming with activity. Other students who listened to music they had never heard in sequence before did not have that same neural bustle.

"This now explains how it is that, even before an anticipated song is actually heard, a person can start to tap fingers, dance, or sing to the music they imagine is coming next," says Josef Rauschecker, PhD, director of the Program in Cognitive and Computational Sciences (PICCS), at Georgetown University Medical Center.

While it makes sense that song sequences can be memorized and thus anticipated by a listener, no one before has ever documented the brain activity that is underway in the silence between songs, he says.

"The brain is all about anticipation and prediction, yet no one has shown what that looks like in terms of neural action," says Rauschecker.

He adds that this same process, known as cued associative learning, likely occurs whenever a human is expecting any particular action to happen, be it in sports, music, or language.

"It is how a skier is mentally prepared to go down a familiar course during the Olympics, or how a piano player knows to move fingers along the keyboard to hit the next correct key," Rauschecker says.

This sounds simple, but it isn't, he says. "It is not trivial to store a temporal sequence in the brain, becau
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Contact: Karen Mallet
km463@georgetown.edu
215-514-9751
Georgetown University Medical Center
Source:Eurekalert

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