Proceedings of the 10th Annual Computational Neuroscience Meeting
June 30-July 6 - 2001 - San Francisco and Pacific Grove (California, USA).
 
From single-trial ERPs to brain area dynamics: Sequential activations during rapid categorization of natural images
 
(1)Delorme A., (1)Makeig, S., (2)Fabre-Thorpe, M., (1)Sejnowski, T.
 

(1)The Salk Institute for Biological Studies, La Jolla, CA92109, USA

(2)CERCO, Faculte de medecine, 133 route de Narbonne, 31062 Toulouse Cedex, France

arno@salk.edu, scott@salk.edu, mft@cerco.ups-tlse.fr, terry@salk.edu

 
    Starting from a feedforward model for early visual processing, we applied a new statistical technique, Independent Component Analysis, to single-trial data in a fast go-nogo categorization task using natural images. We showed that the individual independent components of the collection of single-trial ERP data are related to reaction time and occur with different time courses at different locations. Plotting the event related correlation between the components can help order them in time and may give rise to a general sequential information transfer in the brain during this task.