Abstract
A novel adaptive and approximate shift-invariant wavelet packet feature extraction scheme for event-related potentials (ERPs) in the electroencephalogram (EEG) is introduced in this paper. In this algorithm, the shift-invariant wavelet packed decomposition is done by integrating a cost function for decimation decision in each sub-band expansion. Additionally, a shape adaptation of the wavelet is implemented to find the best adapted wavelet shape for a given class of ERPs. This scheme is used to analyze the time course of the impact of single-pulse transcranial magnetic stimulation (TMS) to the auditory ERPs. We show that the proposed scheme is able to extract even slightest impacts of TMS, making it a promising tool for the extraction of weak ERPs components, particularly in hybrid TMS–EEG/ERP setups.
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Harris, A.R., Schwerdtfeger, K. & Strauss, D.J. Adapted filter banks for feature extraction in transcranial magnetic stimulation evoked responses. Med Biol Eng Comput 49, 221–231 (2011). https://doi.org/10.1007/s11517-010-0726-7
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DOI: https://doi.org/10.1007/s11517-010-0726-7