Ictal source analysis: Localization and imaging of causal interactions in humans
Open accessAbstract
We propose a new integrative approach to characterize the structure of seizures in the space, time, and frequency domains. Such characterization leads to a new technical development of ictal source analysis for the presurgical evaluation of epilepsy patients. The present new ictal source analysis method consists of three parts. First, a three-dimensional source scanning procedure is performed by a spatio-temporal FINE source localization method to locate the multiple sources responsible for the time evolving ictal rhythms at their onsets. Next, the dynamic behavior of the sources is modeled by a multivariate autoregressive process (MVAR). Lastly, the causal interaction patterns among the sources as a function of frequency are estimated from the MVAR modeling of the source temporal dynamics. The causal interaction patterns indicate the dynamic communications between sources, which are useful in distinguishing the primary sources responsible for the ictal onset from the secondary sources caused by the ictal propagation. The present ictal analysis strategy has been applied to a number of seizures from five epilepsy patients, and their results are consistent with observations from either MRI lesions or SPECT scans, which indicate its effectiveness. Each step of the ictal source analysis is statistically evaluated in order to guarantee the confidence in the results.
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Electrophysiological source imaging has been used successfully to localize seizures.
“Furthermore, ESI has been used successfully to localize seizures (82–84).”
From Electrophysiological source imaging: A noninvasive window to brain dynamics (2018) · cites this paper as [82]
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- Authors
- Ding, L., Worrell, G. A., Lagerlund, T. D., & He, B.
- Affiliations
- University of Minnesota (US)
- Mayo Clinic (US)
- Corresponding author
- He, Bin
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2007-01
- Volume
- 34
- Issue
- 2
- Pages
- 575-586
- ISSN
- 1053-8119 (ISSN-L)
- PMC
- PMC1815475
- OpenAlex
- W2021337051
- Cited by
- 183
- References
- 64
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 5 · 2023: 3 · 2022: 12 · 2021: 5 · 2020: 9 · 2019: 9 · 2018: 16 · 2017: 10 · 2016: 18 · 2015: 11 · 2014: 11 · 2013: 10 · 2012: 10
- FWCI
- 4.05
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- NeuroImage (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- National Institute of Biomedical Imaging and Bioengineering (R01EB000178, EB00178)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
- Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- epilepsy, seizure onset, source localization, multivariate autoregressive model, preoperative assessment
- MeSH terms
- Brain, Brain Mapping, Electroencephalography, Humans, Magnetic Resonance Imaging, Seizures, Magnetoencephalography, Tomography, Emission-Computed, Single-Photon, Imaging, Three-Dimensional
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