Van Pelt and Fries show that the peak frequency of gamma-band decreases with stimulus eccentricity and that stationary and moving stimuli are similarly modulated. These results argue that gamma is related to stimulus salience and are consistent with recent observations of increased gamma vs beta synchrony for bottom-up vs top-down attention in the frontoparietal cortical network (Buschman and Miller (2007).
For further reading:
Buschman, T.J. and Miller, E.K. (2007) Top-down versus bottom-up control of attention in the prefrontal and posterior parietal cortices. Science. 315: 1860-1862 The Scientist’s “Hot Paper” for October 2009. View PDF »
About the Author
The Miller Lab uses experimental and theoretical approaches to study the neural basis of the high-level cognitive functions that underlie complex goal-directed behavior. ekmillerlab.mit.edu