Title :
Stockwell Coherence and Its Application in Studying Motor Cortices under the Multi-Source Interference Task
Author :
Liu, Cheng ; Gaetz, William ; Zhu, Hongmei
Author_Institution :
Dept. of Math. & Stat., York Univ., Toronto, ON, Canada
Abstract :
Coherence function plays an important role in measuring brain functional connectivity. In this paper, we extend the definition of coherence function from the classic Fourier domain to the time-frequency plane using the Stockwell transform. This extension has advantages over other existing time-varying coherence functions in terms of easy interpretation and fast computation. An application of our approach to an MEG study reveals interesting temporal interaction between contralateral and ipsilateral motor cortices under the multi-source interference task.
Keywords :
Fourier analysis; magnetoencephalography; neurophysiology; time-frequency analysis; Fourier domain; MEG study; Stockwell coherence; Stockwell transform; brain functional connectivity; motor cortices; multisource interference task; temporal interaction; time-frequency plane; Brain; Coherence; Density functional theory; Fourier transforms; Frequency estimation; Frequency measurement; Interference; Signal resolution; Time frequency analysis; Wavelet transforms;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163426
