@inproceedings{c8527d14fb2345fab59de1efedf5de80,
title = "Detecting stimulus driven changes in functional brain connectivity",
abstract = "We consider the problem of detecting stimulus driven changes in brain functional connectivity. Estimating functional connectivity from fMRI data sampled over a small time period is difficult - there is simply not enough data to permit reliable estimates. We investigate the use of a sparse Gaussian graphical model regularized by a graph learned from data sampled over a longer time period. We establish a framework to identify the changes in brain connectivity driven by short-term stimuli. Results of experiments on both synthetic and real fMRI data illustrate the attributes of our methods as well as the difficulty of the problem.",
keywords = "Brain Connectivity, Graphical Lasso, Time-Dependent Network, fMRI",
author = "Pingmei Xu and Hao Xu and Ramadge, {Peter Jeffrey}",
year = "2013",
month = oct,
day = "18",
doi = "10.1109/ICASSP.2013.6638310",
language = "English (US)",
isbn = "9781479903566",
series = "ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings",
pages = "3507--3511",
booktitle = "2013 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013 - Proceedings",
note = "2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013 ; Conference date: 26-05-2013 Through 31-05-2013",
}