Cited by 307EEG and Brain-Computer InterfacesNeural dynamics and brain functionOptical Imaging and Spectroscopy Techniques

On the Relationship of Synaptic Activity to Macroscopic Measurements: Does Co-Registration of EEG with fMRI Make Sense?

Nunez, Paul L., Silberstein, Richard B.·2000·Brain Topography

Abstract

A two-scale theoretical description outlines relationships between brain current sources and the resulting extracranial electric field, recorded as EEG. Finding unknown sources of EEG, the so-called "inverse problem", is discussed in general terms, with emphasis on the fundamental non-uniqueness of inverse solutions. Hemodynamic signatures, measured with fMRI, are expressed as voxel integrals to facilitate comparisons with EEG. Two generally distinct cell groups (1 and 2), generating EEG and fMRI signals respectively, are embedded within the much broader class of synaptic action fields. Cell groups 1 and 2 may or may not overlap in specific experiments. Implications of this incomplete overlap for co-registration studies are considered. Each experimental measure of brain function is generally sensitive to a different kind of source activity and to different spatial and temporal scales. Failure to appreciate such distinctions can exacerbate conflicting views of brain function that emphasize either global integration or functional localization.

Integrity signals

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Crossref · 10.1023/a:1026683200895

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  • fMRI and EEG signals largely share a common origin in cortical synaptic activity, but reflect its distribution and dynamics at different spatial and temporal scales with distinct sensitivity, resolution, and specificity.

    “Given these findings, it is reasonable to state that fMRI and EEG signals, to a large extent, share a common origin of cortical synaptic activity, but reflect its distribution and dynamics in highly different spatial and temporal scales with distinctive sensitivity, resolution, and specificity (141).”

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Authors
Nunez, P. L., & Silberstein, R. B.
Affiliations
Tulane University (US)
Corresponding author
Nunez, Paul L.
Venue
Brain Topography
Published
2000-12
Volume
13
Issue
2
Pages
79-96
ISSN
  • 0896-0267 (ISSN-L)
  • 1573-6792
OpenAlex
W2146533369
Cited by
307
References
62
Citations by year
2026: 2 · 2025: 5 · 2024: 5 · 2023: 3 · 2022: 6 · 2021: 8 · 2020: 8 · 2019: 4 · 2018: 12 · 2017: 10 · 2016: 12 · 2015: 9 · 2014: 14 · 2013: 17 · 2012: 18
FWCI
4.28
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Topography (publishedVersion)
  • PubMed (publishedVersion)
  • Swinburne figshare (Swinburne University of Technology) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
Keywords
EEG inverse problem
MeSH terms
Brain, Electroencephalography, Humans, Magnetic Resonance Imaging, Models, Neurological, Synapses, Tomography, Emission-Computed, Magnetoencephalography

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