Simultaneous spatio-temporal matching pursuit decomposition of evoked brain responses in MEG.

ABSTRACT: We present a novel approach to the spatio-temporal decomposition of evoked brain responses in magnetoencephalography (MEG) aiming at a sparse representation of the underlying brain activity in terms of spatio-temporal atoms. Our approach is characterized by three attributes which constitute significant improvements with respect to existing approaches: (1) the spatial and temporal decomposition is addressed simultaneously rather than sequentially, with the benefit that source loci and corresponding waveforms can be unequivocally allocated to each other, and, hence, allow a plausible physiological interpretation of the parametrized data; (2) it is free from severe a priori assumptions about the solution space; (3) it comprises an optimization technique for the use of very large spatial and t

SUBMITTER: Kordowski P 

PROVIDER: S-EPMC5326632 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature