Elucidation of the effects of vagus nerve stimulation (VNS) on cerebral blood flow and neural function in refractory epilepsy
Project/Area Number |
16K10786
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Neurosurgery
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Research Institution | Osaka University |
Principal Investigator |
Maruo Tomoyuki 大阪大学, 医学系研究科, 招へい教員 (90533810)
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Co-Investigator(Kenkyū-buntansha) |
貴島 晴彦 大阪大学, 医学系研究科, 教授 (10332743)
押野 悟 大阪大学, 医学系研究科, 准教授 (40403050)
中村 元 大阪大学, 医学系研究科, 助教 (80533794)
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Project Period (FY) |
2016-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | てんかん / 迷走神経刺激 / 脳血流 / 脳波 / 脳代謝 / てんかんモデル / 脳波解析 / VNS / 脳神経外科学 / 機能脳神経外科学 |
Outline of Final Research Achievements |
In the present study, we established the method for creating models of acute and chronic generalized epilepsy and analyzed data to elucidate the effects of left vagus nerve stimulation on EEG, cerebral blood flow, and brain function and metabolism. The transient increase in cerebral blood flow induced by vagus nerve stimulation and the subsequent decrease in cerebral blood flow and metabolism after continued stimulation, as well as the marked decrease in epileptic waves, were confirmed with good reproducibility. This suggests that left vagus nerve stimulation contributes to the inhibition of seizure wave firing as well as the suppression of cerebral blood flow associated with seizure wave propagation. The results of this study will lead to the conditions for effective vagal nerve stimulation of refractory epilepsy and to the selection of effective treatment targets.
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Academic Significance and Societal Importance of the Research Achievements |
本研究の結果は、発作につながる脳波変化時の局所血流変化と、非発作性てんかん性放電時の局所血流変化を捉え発作のトリガーや発作発現機序の解明の手がかりとなるものと考えられる。難治性てんかん治療に携わっている医療者にとって、薬物治療や手術でも治療に難渋する発作を呈する患者を多数経験している。今研究により、難治性てんかんに関する病態解明や治療法のさらなる開発の一助となることが期待できる。
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Report
(5 results)
Research Products
(28 results)
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[Journal Article] Navigation-assisted trans-inferotemporal cortex selective amygdalohippocampectomy for mesial temporal lobe epilepsy; preserving the temporal stem.2017
Author(s)
Kishima H, Kato A, Oshino S, Tani N, Maruo T, Khoo HM, Yanagisawa T, Edakawa K, Kobayashi M, Tanaka M, Hosomi K, Hirata M1, Yoshimine T
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Journal Title
Neurol Res
Volume: 39(3)
Issue: 3
Pages: 223-230
DOI
Related Report
Peer Reviewed
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[Journal Article] Efficacy of deep rTMS for neuropathic pain in the lower limb; a randomized, double-blinded, crossover trial of an H-coil and figure-8 coil.2017
Author(s)
Shimizu T, Hosomi K, Maruo T, Goto Y, Yokoe M, Kageyama Y, Shimokawa T, Yoshimine T, Saitoh Y
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Journal Title
J Neurosurg.
Volume: 3
Issue: 5
Pages: 1-9
DOI
Related Report
Peer Reviewed
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[Journal Article] Default mode network connectivity in patients with idiopathic normal pressure hydrocephalus2016
Author(s)
Khoo HM, Kishima H, Tani N, Oshino S, Maruo T, Hosomi K, Yanagisawa T, Kazui H, Watanabe Y, Shimokawa T, Aso T, Kawaguchi A, Yamashita F, Saitoh Y, Yoshimine T
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Journal Title
J Neurosurg.
Volume: 124
Issue: 2
Pages: 350-358
DOI
Related Report
Peer Reviewed
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[Journal Article] Electrical stimulation of the parahippocampal gyrus for prediction of posthippocampectomy verbal memory decline2016
Author(s)
Tani N, Kishima H, Khoo HM, Yanagisawa T, Oshino S, Maruo T, Hosomi K, Hirata M, Kazui H, Nomura KT, Aly MM, Kato A, Yoshimine T
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Journal Title
J Neurosurg.
Volume: 15
Issue: 5
Pages: 1-8
DOI
Related Report
Peer Reviewed
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[Journal Article] Daily repetitive transcranial magnetic stimulation for post-stroke upper limb paresis in the subacute period2016
Author(s)
Hosomi K, Morris S, Sakamoto T, Taguchi J, Maruo T, Kageyama Y, Kinoshita Y, Goto Y, Shimokawa T, Koyama T, Saitoh Y
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Journal Title
J Stroke Cerebrovasc Dis.
Volume: 25(7)
Pages: 1655-1664
Related Report
Peer Reviewed
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