Independent component analysis of noninvasively recorded cortical magnetic DC-fields in humans
- 1 May 2000
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. 47 (5) , 594-599
- https://doi.org/10.1109/10.841331
Abstract
We apply a recently developed multivariate statistical data analysis technique--so called blind source separation (BSS) by independent component analysis--to process magnetoencephalogram recordings of near-dc fields. The extraction of near-dc fields from MEG recordings has great relevance for medical applications since slowly varying dc-phenomena have been found, e.g., in cerebral anoxia and spreading depression in animals. Comparing several BSS approaches, it turns out that an algorithm based on temporal decorrelation successfully extracted a dc-component which was induced in the auditory cortex by presentation of music. The task is challenging because of the limited amount of available data and the corruption by outliers, which makes it an interesting real-world testbed for studying the robustness of ICA methods.Keywords
This publication has 27 references indexed in Scilit:
- SQUID measurements of human nerve and muscle near-dc injury-currents using a mechanical modulation of the source positionApplied Superconductivity, 1999
- Magnetometry of injury currents from human nerve and muscle specimens using Superconducting Quantum Interferences DevicesNeuroscience Letters, 1999
- The Auditory Evoked “Off” Response: Sources and Comparison with the"On" and the “Sustained” ResponsesEar & Hearing, 1996
- The PTB 83-SQUID system for biomagnetic applications in a clinicIEEE Transactions on Applied Superconductivity, 1995
- Independent component analysis, A new concept?Signal Processing, 1994
- Non-invasive neuromagnetic monitoring of nerve and muscle injury currentsElectroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1993
- Blind beamforming for non-gaussian signalsIEE Proceedings F Radar and Signal Processing, 1993
- Compound action potential of nerve recorded by suction electrode: a theoretical and experimental analysisBrain Research, 1991
- Selective listening modifies activity of the human auditory cortexExperimental Brain Research, 1989
- Human auditory sustained potentials. I. The nature of the responseElectroencephalography and Clinical Neurophysiology, 1978