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Cerebral Activation during Vagus Nerve Stimulation: A Functional MR Study

Narayanan, Jaishree T., Watts, Richard, Haddad, Naim, Labar, Douglas R., Li, P. Mark, Filippi, Christopher G.·2002·Epilepsia

Abstract

Summary: Purpose: To study the short‐term effects of vagus nerve stimulation (VNS) on brain activation and cerebral blood flow by using functional magnetic resonance imaging (fMRI). Methods: Five patients (three women, two men; mean age, 35.4 years) who were treated for medically refractory epilepsy with VNS, underwent fMRI. All patients had a nonfocal brain MRI. The VNS was set at 30 Hz, 0.5–2.0 mA for intervals of activation of 30 s on and 30 s off, during which the fMRI was performed. Statistical parametric mapping (SPM) was used to determine significant areas of activation or inhibition during vagal nerve stimulation (p < 0.05). Results: VNS‐induced activation was detected in the thalami bilaterally (left more than right), insular cortices bilaterally, ipsilateral basal ganglia and postcentral gyri, right posterior superior temporal gyrus, and inferomedial occipital gyri (left more than right). The most robust activation was seen in the thalami (left more than right) and insular cortices. Conclusions: VNS‐induced thalamic and insular cortical activation during fMRI suggests that these areas may play a role in modulating cerebral cortical activity, and the observed decrease in seizure frequency in patients who are given VNS may be a consequence of this increased activation.

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Metadata

Authors
Narayanan, J. T., Watts, R., Haddad, N., Labar, D. R., Li, P. M., & Filippi, C. G.
Venue
Epilepsia
Publisher
Wiley
Published
2002-12
Volume
43
Issue
12
Pages
1509-1514
ISSN
  • 0013-9580 (ISSN-L)
  • 1528-1167
OpenAlex
W2009420340
Cited by
159
References
3
FWCI
4.61
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Cerebral Activation during Vagus Nerve Stimulation: A Functional MR Study. https://app.cochat.ai/papers/10.1046/j.1528-1157.2002.16102.x
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Narayanan, J. T., Watts, R., Haddad, N., Labar, D. R., Li, P. M., & Filippi, C. G. (2002). Cerebral Activation during Vagus Nerve Stimulation: A Functional MR Study. Epilepsia. https://doi.org/10.1046/j.1528-1157.2002.16102.x

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