Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-49631
Pascual-Marqui, R D; Lehmann, D; Koukkou, M; Kochi, K; Anderer, P; Saletu, B; Tanaka, H; Hirata, K; John, E R; Prichep, L; Biscay-Lirio, R; Kinoshita, T (2011). Assessing interactions in the brain with exact low-resolution electromagnetic tomography. Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences, 369(1952):3768-3784.
View at publisher
Scalp electric potentials (electroencephalogram; EEG) are contingent to the impressed current density unleashed by cortical pyramidal neurons undergoing post-synaptic processes. EEG neuroimaging consists of estimating the cortical current density from scalp recordings. We report a solution to this inverse problem that attains exact localization: exact low-resolution brain electromagnetic tomography (eLORETA). This non-invasive method yields high time-resolution intracranial signals that can be used for assessing functional dynamic connectivity in the brain, quantified by coherence and phase synchronization. However, these measures are non-physiologically high because of volume conduction and low spatial resolution. We present a new method to solve this problem by decomposing them into instantaneous and lagged components, with the lagged part having almost pure physiological origin.
318 downloads since deposited on 15 Sep 2011
55 downloads since 12 months
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > Psychiatric University Hospital Zurich > Clinic for Psychiatry, Psychotherapy, and Psychosomatics
04 Faculty of Medicine > The KEY Institute for Brain-Mind Research
|Dewey Decimal Classification:||610 Medicine & health|
|Deposited On:||15 Sep 2011 07:00|
|Last Modified:||27 Nov 2013 20:19|
|Publisher:||Royal Society Publishing|
|Related URLs:||http://rsta.royalsocietypublishing.org/ (Publisher)|
Users (please log in): suggest update or correction for this item
Repository Staff Only: item control page