The Behavioral Significance of Spontaneous Fluctuations in Brain Activity

  • Birn R
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Low-frequency fluctuations in fMRI data are believed to reflect synchronous and spontaneous fluctuations in neuronal networks. A study by Fox et al. in this issue of Neuron shows that these spontaneous fluctuations in the motor cortex can account for significant trial-to-trial variations in both the fMRI response and behavior. © 2007 Elsevier Inc. All rights reserved.

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  • Rasmus M. Birn

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