Abstract
We extend adaptive beamformers (DICS) and RAP MUSIC to solve the MEG inverse problem in the time-frequency domain for induced and phase-locked components. Using event-related data, we estimate the complex covariances from time-frequency transformed single trials for total power, phase locked, and induced components . We obtain the phase-locked DICS inverse as the difference between the total power and induced solutions. RAP-MUSIC was adapted to constrain the real and imaginary parts of the source space solution. We have verified these methods using simulated data, and validated them with somatosensory and motor MEG data.
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© 2010 Springer-Verlag Berlin Heidelberg
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Greenblatt, R.E., Ossadtchi, A., Kurelowech, L., Lawson, D., Criado, J. (2010). Time-Frequency Source Estimation from MEG Data. In: Supek, S., Sušac, A. (eds) 17th International Conference on Biomagnetism Advances in Biomagnetism – Biomag2010. IFMBE Proceedings, vol 28. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12197-5_28
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DOI: https://doi.org/10.1007/978-3-642-12197-5_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-12196-8
Online ISBN: 978-3-642-12197-5
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