An effect of vagal nerve stimulation (VNS) on cortical synchronization has been postulated but remains to be verified. In this study we investigated the impact of VNS on functional connectivity (Fc) using direct intracerebral recordings (stereotactic EEG, SEEG). Five patients with epilepsy who underwent SEEG recordings during ongoing VNS therapy were investigated. Interdependencies between twenty-six selected bipolar SEEG channels were estimated by nonlinear regression analysis during ON and OF periods of stimulation. In comparison with OFF periods, the ON periods disclosed higher values for four patients (P1, P3, P4, P5) and lower values for one patient (P2). From thresholded graphs, we observed increased connections between several brain regions in P1 and P5 and decreased connections in P2. Finally, the only decreased Fc occurring during VNS corresponded to the responder patient, suggesting that therapeutic impact might be related to this mechanism. (C) 2016 Elsevier B.V. All rights reserved.
机构:
Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Purdue Univ, Purdue Inst Integrat Neuroscience, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Cao, Jiayue
Lu, Kun-Han
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Purdue Univ, Purdue Inst Integrat Neuroscience, W Lafayette, IN 47907 USA
Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Lu, Kun-Han
Powley, Terry L.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Purdue Univ, Purdue Inst Integrat Neuroscience, W Lafayette, IN 47907 USA
Purdue Univ, Dept Psychol Sci, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Powley, Terry L.
Liu, Zhongming
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Purdue Univ, Purdue Inst Integrat Neuroscience, W Lafayette, IN 47907 USA
Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
机构:
Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Xu, Cuiping
Zhang, Xi
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Zhang, Xi
Qiao, Liang
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Qiao, Liang
Wang, Xueyuan
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Wang, Xueyuan
Yan, Xiaoming
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Yan, Xiaoming
Ni, Duanyu
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Ni, Duanyu
Yu, Tao
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Yu, Tao
Zhang, Guojun
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China
Zhang, Guojun
Li, Yongjie
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Capital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R ChinaCapital Med Univ, Xuanwu Hosp, Beijing Inst Funct Neurosurg, Beijing, Peoples R China