1
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Abbott CC, Miller J, Farrar D, Argyelan M, Lloyd M, Squillaci T, Kimbrell B, Ryman S, Jones TR, Upston J, Quinn DK, Peterchev AV, Erhardt E, Datta A, McClintock SM, Deng ZD. Amplitude-determined seizure-threshold, electric field modeling, and electroconvulsive therapy antidepressant and cognitive outcomes. Neuropsychopharmacology 2024; 49:640-648. [PMID: 38212442 PMCID: PMC10876627 DOI: 10.1038/s41386-023-01780-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/06/2023] [Accepted: 11/26/2023] [Indexed: 01/13/2024]
Abstract
Electroconvulsive therapy (ECT) pulse amplitude, which dictates the induced electric field (E-field) magnitude in the brain, is presently fixed at 800 or 900 milliamperes (mA) without clinical or scientific rationale. We have previously demonstrated that increased E-field strength improves ECT's antidepressant effect but worsens cognitive outcomes. Amplitude-determined seizure titration may reduce the E-field variability relative to fixed amplitude ECT. In this investigation, we assessed the relationships among amplitude-determined seizure-threshold (STa), E-field magnitude, and clinical outcomes in older adults (age range 50 to 80 years) with depression. Subjects received brain imaging, depression assessment, and neuropsychological assessment pre-, mid-, and post-ECT. STa was determined during the first treatment with a Soterix Medical 4×1 High Definition ECT Multi-channel Stimulation Interface (Investigation Device Exemption: G200123). Subsequent treatments were completed with right unilateral electrode placement (RUL) and 800 mA. We calculated Ebrain defined as the 90th percentile of E-field magnitude in the whole brain for RUL electrode placement. Twenty-nine subjects were included in the final analyses. Ebrain per unit electrode current, Ebrain/I, was associated with STa. STa was associated with antidepressant outcomes at the mid-ECT assessment and bitemporal electrode placement switch. Ebrain/I was associated with changes in category fluency with a large effect size. The relationship between STa and Ebrain/I extends work from preclinical models and provides a validation step for ECT E-field modeling. ECT with individualized amplitude based on E-field modeling or STa has the potential to enhance neuroscience-based ECT parameter selection and improve clinical outcomes.
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Affiliation(s)
| | - Jeremy Miller
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Danielle Farrar
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Miklos Argyelan
- Institute of Behavioral Science, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, NY, USA
| | - Megan Lloyd
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Taylor Squillaci
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Brian Kimbrell
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Sephira Ryman
- Mind Research Network, Albuquerque, NM, USA
- Department of Neurology, Albuquerque, NM, USA
| | - Thomas R Jones
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Joel Upston
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Davin K Quinn
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Angel V Peterchev
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA
- Department of Neurosurgery, Duke University School of Medicine, Durham, NC, USA
| | - Erik Erhardt
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA
| | | | - Shawn M McClintock
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
- Division of Psychology, Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Zhi-De Deng
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
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2
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Argyelan M, Deng ZD, Ousdal OT, Oltedal L, Angulo B, Baradits M, Spitzberg AJ, Kessler U, Sartorius A, Dols A, Narr KL, Espinoza R, van Waarde JA, Tendolkar I, van Eijndhoven P, van Wingen GA, Takamiya A, Kishimoto T, Jorgensen MB, Jorgensen A, Paulson OB, Yrondi A, Péran P, Soriano-Mas C, Cardoner N, Cano M, van Diermen L, Schrijvers D, Belge JB, Emsell L, Bouckaert F, Vandenbulcke M, Kiebs M, Hurlemann R, Mulders PC, Redlich R, Dannlowski U, Kavakbasi E, Kritzer MD, Ellard KK, Camprodon JA, Petrides G, Malhotra AK, Abbott CC. Electroconvulsive therapy-induced volumetric brain changes converge on a common causal circuit in depression. Mol Psychiatry 2024; 29:229-237. [PMID: 37985787 PMCID: PMC11116108 DOI: 10.1038/s41380-023-02318-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 10/23/2023] [Accepted: 11/06/2023] [Indexed: 11/22/2023]
Abstract
Neurostimulation is a mainstream treatment option for major depression. Neuromodulation techniques apply repetitive magnetic or electrical stimulation to some neural target but significantly differ in their invasiveness, spatial selectivity, mechanism of action, and efficacy. Despite these differences, recent analyses of transcranial magnetic stimulation (TMS) and deep brain stimulation (DBS)-treated individuals converged on a common neural network that might have a causal role in treatment response. We set out to investigate if the neuronal underpinnings of electroconvulsive therapy (ECT) are similarly associated with this causal depression network (CDN). Our aim here is to provide a comprehensive analysis in three cohorts of patients segregated by electrode placement (N = 246 with right unilateral, 79 with bitemporal, and 61 with mixed) who underwent ECT. We conducted a data-driven, unsupervised multivariate neuroimaging analysis Principal Component Analysis (PCA) of the cortical and subcortical volume changes and electric field (EF) distribution to explore changes within the CDN associated with antidepressant outcomes. Despite the different treatment modalities (ECT vs TMS and DBS) and methodological approaches (structural vs functional networks), we found a highly similar pattern of change within the CDN in the three cohorts of patients (spatial similarity across 85 regions: r = 0.65, 0.58, 0.40, df = 83). Most importantly, the expression of this pattern correlated with clinical outcomes (t = -2.35, p = 0.019). This evidence further supports that treatment interventions converge on a CDN in depression. Optimizing modulation of this network could serve to improve the outcome of neurostimulation in depression.
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Affiliation(s)
- Miklos Argyelan
- Feinstein Institutes for Medical Research, Institute of Behavioral Science, Manhasset, NY, USA.
- The Zucker Hillside Hospital, Glen Oaks, NY, USA.
| | - Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Olga Therese Ousdal
- Department of Biomedicine, Faculty of Medicine, University of Bergen, Bergen, Norway
- Department of Radiology, Haukeland University Hospital, Bergen, Norway
| | - Leif Oltedal
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Mohn Medical Imaging and Visualization Centre, Department of Radiology, Haukeland University Hospital, Bergen, Norway
| | - Brian Angulo
- Feinstein Institutes for Medical Research, Institute of Behavioral Science, Manhasset, NY, USA
| | - Mate Baradits
- Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary
| | | | - Ute Kessler
- Department of Psychiatry, Haukeland University Hospital, University of Bergen, Bergen, Hungary
| | - Alexander Sartorius
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health (CIMH), Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Annemiek Dols
- Department of Psychiatry, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, The Netherlands
- Amsterdam UMC location Vrije Universiteit Amsterdam, Psychiatry, Neuroscience, Amsterdam, The Netherlands
| | - Katherine L Narr
- Department of Neurology, University of California Los Angeles, Los Angeles, CA, USA
| | - Randall Espinoza
- Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles, Los Angeles, CA, USA
| | | | - Indira Tendolkar
- Donders Institute for Brain, Cognition and Behavior, Department of Psychiatry, Nijmegen, the Netherlands
| | - Philip van Eijndhoven
- Donders Institute for Brain, Cognition and Behavior, Department of Psychiatry, Nijmegen, the Netherlands
| | - Guido A van Wingen
- Amsterdam UMC location University of Amsterdam, Department of Psychiatry, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Akihiro Takamiya
- Department of Neuropsychiatry Keio University School of Medicine, Tokyo, Japan
- Neuropsychiatry, Department of Neurosciences, Leuven Brain Institute, KU Leuven, Belgium
| | - Taishiro Kishimoto
- Hills Joint Research Laboratory for Future Preventive Medicine and Wellness, Keio University School of Medicine, Tokyo, Japan
| | - Martin B Jorgensen
- Psychiatric Center Copenhagen and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Anders Jorgensen
- Psychiatric Center Copenhagen and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Olaf B Paulson
- Neurobiological Research Unit Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Antoine Yrondi
- Service de Psychiatrie et Psychologie Médicale, Centre Expert Dépression Résistante, Fondation Fondamental, CHU Toulouse, ToNIC, Toulouse NeuroImaging Center, Univerité de Toulouse, Inserm, UPS, Toulouse, France
| | - Patrice Péran
- ToNIC, Toulouse NeuroImaging Center, Univeristé de Toulouse, Inserm, UPS, Toulouse, France
| | - Carles Soriano-Mas
- Department of Social Psychology and Quantitative Psychology, Universitat de Barcelona-UB, Barcelona, Spain
- Bellvitge Biomedical Research Institute-IDIBELL, Department of Psychiatry, Bellvitge University Hospital, Barcelona, Spain
- CIBERSAM, Carlos III Health Institute, Madrid, Spain
| | - Narcis Cardoner
- CIBERSAM, Carlos III Health Institute, Madrid, Spain
- Sant Pau Mental Health Research Group, Institut d'Investigació Biomèdica Sant Pau (IIB-Sant Pau), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
- Department of Psychiatry and Forensic Medicine, School of Medicine Bellaterra, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Cano
- CIBERSAM, Carlos III Health Institute, Madrid, Spain
- Sant Pau Mental Health Research Group, Institut d'Investigació Biomèdica Sant Pau (IIB-Sant Pau), Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Linda van Diermen
- Department of Psychiatry, Collaborative Antwerp Psychiatric Research Institute (CAPRI), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Psychiatric Center Bethanie, Andreas Vesaliuslaan 39, 2980, Zoersel, Belgium
| | - Didier Schrijvers
- Department of Psychiatry, Collaborative Antwerp Psychiatric Research Institute (CAPRI), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- University Psychiatric Center Duffel, Stationstraat 22, Duffel, 2570, Belgium
| | - Jean-Baptiste Belge
- Department of Psychiatry, Collaborative Antwerp Psychiatric Research Institute (CAPRI), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Department of Psychiatry, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Louise Emsell
- Geriatric Psychiatry, University Psychiatric Center-KU Leuven, Leuven, Belgium
| | - Filip Bouckaert
- Geriatric Psychiatry, University Psychiatric Center-KU Leuven, Leuven, Belgium
| | | | - Maximilian Kiebs
- School of Medicine & Health Sciences University Hospital Oldenburg, Oldenburg, Germany
- Department of Psychiatry and Psychotherapy University Hospital Bonn, Bonn, Germany
| | - René Hurlemann
- School of Medicine & Health Sciences University Hospital Oldenburg, Oldenburg, Germany
| | - Peter Cr Mulders
- Donders Institute for Brain, Cognition and Behavior, Department of Psychiatry, Nijmegen, the Netherlands
| | - Ronny Redlich
- Department of Psychology, University of Halle, Halle, Germany
- German Center for Mental Health (DZPG), Site Jena-Magdeburg-Halle, Halle, Germany
| | - Udo Dannlowski
- Department of Translational Psychiatry, University of Muenster, Muenster, Germany
| | - Erhan Kavakbasi
- Department of Mental Health, University of Muenster, Muenster, Germany
| | - Michael D Kritzer
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kristen K Ellard
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Joan A Camprodon
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | | | - Anil K Malhotra
- Feinstein Institutes for Medical Research, Institute of Behavioral Science, Manhasset, NY, USA
- The Zucker Hillside Hospital, Glen Oaks, NY, USA
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Deng ZD, Robins PL, Regenold W, Rohde P, Dannhauer M, Lisanby SH. How electroconvulsive therapy works in the treatment of depression: is it the seizure, the electricity, or both? Neuropsychopharmacology 2024; 49:150-162. [PMID: 37488281 PMCID: PMC10700353 DOI: 10.1038/s41386-023-01677-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/27/2023] [Accepted: 07/14/2023] [Indexed: 07/26/2023]
Abstract
We have known for nearly a century that triggering seizures can treat serious mental illness, but what we do not know is why. Electroconvulsive Therapy (ECT) works faster and better than conventional pharmacological interventions; however, those benefits come with a burden of side effects, most notably memory loss. Disentangling the mechanisms by which ECT exerts rapid therapeutic benefit from the mechanisms driving adverse effects could enable the development of the next generation of seizure therapies that lack the downside of ECT. The latest research suggests that this goal may be attainable because modifications of ECT technique have already yielded improvements in cognitive outcomes without sacrificing efficacy. These modifications involve changes in how the electricity is administered (both where in the brain, and how much), which in turn impacts the characteristics of the resulting seizure. What we do not completely understand is whether it is the changes in the applied electricity, or in the resulting seizure, or both, that are responsible for improved safety. Answering this question may be key to developing the next generation of seizure therapies that lack these adverse side effects, and ushering in novel interventions that are better, faster, and safer than ECT.
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Affiliation(s)
- Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Pei L Robins
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - William Regenold
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Paul Rohde
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Moritz Dannhauer
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Sarah H Lisanby
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA.
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4
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Deng ZD, Ousdal OT, Oltedal L, Angulo B, Baradits M, Spitzberg A, Kessler U, Sartorius A, Dols A, Narr K, Espinoza R, Van Waarde J, Tendolkar I, van Eijndhoven P, van Wingen G, Takamiya A, Kishimoto T, Jorgensen M, Jorgensen A, Paulson O, Yrondi A, Peran P, Soriano-Mas C, Cardoner N, Cano M, van Diermen L, Schrijvers D, Belge JB, Emsell L, Bouckaert F, Vandenbulcke M, Kiebs M, Hurlemann R, Mulders P, Redlich R, Dannlowski U, Kavakbasi E, Kritzer M, Ellard K, Camprodon J, Petrides G, Maholtra A, Abbott C, Argyelan M. Electroconvulsive therapy-induced volumetric brain changes converge on a common causal circuit in depression. RESEARCH SQUARE 2023:rs.3.rs-2925196. [PMID: 37398308 PMCID: PMC10312966 DOI: 10.21203/rs.3.rs-2925196/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Neurostimulation is a mainstream treatment option for major depression. Neuromodulation techniques apply repetitive magnetic or electrical stimulation to some neural target but significantly differ in their invasiveness, spatial selectivity, mechanism of action, and efficacy. Despite these differences, recent analyses of transcranial magnetic stimulation (TMS) and deep brain stimulation (DBS)-treated individuals converged on a common neural network that might have a causal role in treatment response. We set out to investigate if the neuronal underpinnings of electroconvulsive therapy (ECT) are similarly associated with this common causal network (CCN). Our aim here is to provide a comprehensive analysis in three cohorts of patients segregated by electrode placement (N = 246 with right unilateral, 79 with bitemporal, and 61 with mixed) who underwent ECT. We conducted a data-driven, unsupervised multivariate neuroimaging analysis (Principal Component Analysis, PCA) of the cortical and subcortical volume changes and electric field (EF) distribution to explore changes within the CCN associated with antidepressant outcomes. Despite the different treatment modalities (ECT vs TMS and DBS) and methodological approaches (structural vs functional networks), we found a highly similar pattern of change within the CCN in the three cohorts of patients (spatial similarity across 85 regions: r = 0.65, 0.58, 0.40, df = 83). Most importantly, the expression of this pattern correlated with clinical outcomes. This evidence further supports that treatment interventions converge on a CCN in depression. Optimizing modulation of this network could serve to improve the outcome of neurostimulation in depression.
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Affiliation(s)
| | | | - Leif Oltedal
- Department of Clinical Medicine, University of Bergen
| | - Brian Angulo
- Department of Clinical Medicine, University of Bergen
| | - Mate Baradits
- Department of Clinical Medicine, University of Bergen
| | | | - Ute Kessler
- Department of Clinical Medicine, University of Bergen
| | | | - Annemiek Dols
- Geffen School of Medicine at the University of California, Los Angeles
| | - Katherine Narr
- Geffen School of Medicine at the University of California, Los Angeles
| | - Randall Espinoza
- Departments of Neurology, Psychiatry and Biobehavioral Sciences, University of California
| | | | - Indira Tendolkar
- Donders Institute for Brain, Cognition and Behavior, Department of Psychiatry
| | | | | | | | | | | | | | | | | | | | | | - Narcís Cardoner
- Institut d'Investigació Biomèdica Sant Pau (IIB-Sant Pau), Hospital de la Santa Creu i Sant Pau. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Sa
| | | | | | | | | | | | | | | | | | - Rene Hurlemann
- Institute for Translational Psychiatry, University of Münster
| | - Peter Mulders
- Institute for Translational Psychiatry, University of Münster
| | - Ronny Redlich
- Institute for Translational Psychiatry, University of Münster
| | - Udo Dannlowski
- Institute for Translational Psychiatry, University of Münster
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Kawashima H, Yamasaki S, Kubota M, Hazama M, Fushimi Y, Miyata J, Murai T, Suwa T. Commonalities and differences in ECT-induced gray matter volume change between depression and schizophrenia. Neuroimage Clin 2023; 38:103429. [PMID: 37150022 PMCID: PMC10193002 DOI: 10.1016/j.nicl.2023.103429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/01/2023] [Indexed: 05/09/2023]
Abstract
BACKGROUND Electroconvulsive therapy (ECT) is one of the most effective treatments for depression and schizophrenia, particularly in urgent or treatment-resistant cases. After ECT, regional gray matter volume (GMV) increases have been repeatedly reported both in depression and schizophrenia. However, the interpretation of these findings remains entangled because GMV changes do not necessarily correlate with treatment effects and may be influenced by the intervention itself. We hypothesized that the comparison of longitudinal magnetic resonance imaging data between the two diagnostic groups will provide clues to distinguish diagnosis-specific and transdiagnostic changes. METHOD Twenty-nine Japanese participants, including 18 inpatients with major depressive disorder and 11 with schizophrenia, underwent longitudinal voxel-based morphometry before and after ECT. We investigated GMV changes common to both diagnostic groups and those specific to each group. Moreover, we also evaluated potential associations between GMV changes and clinical improvement for each group. RESULTS In both diagnostic groups, GMV increased in widespread areas after ECT, sharing common regions including: anterior temporal cortex; medial frontal and anterior cingulate cortex; insula; and caudate nucleus. In addition, we found a schizophrenia-specific GMV increase in a region including the left pregenual anterior cingulate cortex, with volume increase significantly correlating with clinical improvement. CONCLUSIONS Transdiagnostic volume changes may represent the effects of the intervention itself and pathophysiological changes common to both groups. Conversely, diagnosis-specific volume changes are associated with treatment effects and may represent pathophysiology-specific impacts of ECT.
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Affiliation(s)
- Hirotsugu Kawashima
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Shimpei Yamasaki
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Manabu Kubota
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masaaki Hazama
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasutaka Fushimi
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Jun Miyata
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshiya Murai
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Taro Suwa
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Dynamic impedance is correlated with static impedance and seizure quality parameters in bifrontal electroconvulsive therapy. Acta Neuropsychiatr 2023; 35:177-185. [PMID: 36803888 DOI: 10.1017/neu.2023.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
BACKGROUND To evoke a therapeutically effective seizure, electrical stimulation in electroconvulsive therapy (ECT) has to overcome the combined resistivity of scalp, skull and other tissues. Static impedances are measured prior to stimulation using high-frequency electrical alternating pulses, dynamic impedances during passage of the stimulation current. Static impedance can partially be influenced by skin preparation techniques. Earlier studies showed a correlation between dynamic and static impedance in bitemporal and right unilateral ECT. OBJECTIVE This study aims at assessing the correlation of dynamic and static impedance with patient characteristics and seizure quality criteria in bifrontal ECT. METHODS We performed a cross-sectional single-centre retrospective analysis of ECT treatments at the Psychiatric University Hospital Zurich between May 2012 and March 2020 and used linear mixed-effects regression models in 78 patients with a total of 1757 ECT sessions. RESULTS Dynamic and static impedance were strongly correlated. Dynamic impedance was significantly correlated with age and higher in women. Energy set and factors positively (caffeine) and negatively (propofol) affecting seizure at the neuronal level were not associated with dynamic impedance. For secondary outcomes, dynamic impedance was significantly related to Maximum Sustained Power and Average Seizure Energy Index. Other seizure quality criteria showed no significant correlation with dynamic impedance. CONCLUSION Aiming for low static impedance might reduce dynamic impedance, which is correlated with positive seizure quality parameters. Therefore, good skin preparation to achieve low static impedance is recommended.
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Fu Z, Abbott CC, Miller J, Deng ZD, McClintock SM, Sendi MSE, Sui J, Calhoun VD. Cerebro-cerebellar functional neuroplasticity mediates the effect of electric field on electroconvulsive therapy outcomes. Transl Psychiatry 2023; 13:43. [PMID: 36746924 PMCID: PMC9902462 DOI: 10.1038/s41398-023-02312-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 02/08/2023] Open
Abstract
Electroconvulsive therapy (ECT) is the most effective treatment for severe depression and works by applying an electric current through the brain. The applied current generates an electric field (E-field) and seizure activity, changing the brain's functional organization. The E-field, which is determined by electrode placement (right unilateral or bitemporal) and pulse amplitude (600, 700, or 800 milliamperes), is associated with the ECT response. However, the neural mechanisms underlying the relationship between E-field, functional brain changes, and clinical outcomes of ECT are not well understood. Here, we investigated the relationships between whole-brain E-field (Ebrain, the 90th percentile of E-field magnitude in the brain), cerebro-cerebellar functional network connectivity (FNC), and clinical outcomes (cognitive performance and depression severity). A fully automated independent component analysis framework determined the FNC between the cerebro-cerebellar networks. We found a linear relationship between Ebrain and cognitive outcomes. The mediation analysis showed that the cerebellum to middle occipital gyrus (MOG)/posterior cingulate cortex (PCC) FNC mediated the effects of Ebrain on cognitive performance. In addition, there is a mediation effect through the cerebellum to parietal lobule FNC between Ebrain and antidepressant outcomes. The pair-wise t-tests further demonstrated that a larger Ebrain was associated with increased FNC between cerebellum and MOG and decreased FNC between cerebellum and PCC, which were linked with decreased cognitive performance. This study implies that an optimal E-field balancing the antidepressant and cognitive outcomes should be considered in relation to cerebro-cerebellar functional neuroplasticity.
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Affiliation(s)
- Zening Fu
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, GA, USA.
| | | | - Jeremy Miller
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Zhi-De Deng
- Computational Neurostimulation Research Program, Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Shawn M McClintock
- Division of Psychology, Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Mohammad S E Sendi
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Jing Sui
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, GA, USA.
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
| | - Vince D Calhoun
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
- Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
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8
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Fu Z, Abbott CC, Sui J, Calhoun VD. Predictive signature of static and dynamic functional connectivity for ECT clinical outcomes. Front Pharmacol 2023; 14:1102413. [PMID: 36755955 PMCID: PMC9899999 DOI: 10.3389/fphar.2023.1102413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/11/2023] [Indexed: 01/24/2023] Open
Abstract
Introduction: Electroconvulsive therapy (ECT) remains one of the most effective approaches for treatment-resistant depressive episodes, despite the potential cognitive impairment associated with this treatment. As a potent stimulator of neuroplasticity, ECT might normalize aberrant depression-related brain function via the brain's reconstruction by forming new neural connections. Multiple lines of evidence have demonstrated that functional connectivity (FC) changes are reliable indicators of antidepressant efficacy and cognitive changes from static and dynamic perspectives. However, no previous studies have directly ascertained whether and how different aspects of FC provide complementary information in terms of neuroimaging-based prediction of clinical outcomes. Methods: In this study, we implemented a fully automated independent component analysis framework to an ECT dataset with subjects (n = 50, age = 65.54 ± 8.92) randomized to three treatment amplitudes (600, 700, or 800 milliamperes [mA]). We extracted the static functional network connectivity (sFNC) and dynamic FNC (dFNC) features and employed a partial least square regression to build predictive models for antidepressant outcomes and cognitive changes. Results: We found that both antidepressant outcomes and memory changes can be robustly predicted by the changes in sFNC (permutation test p < 5.0 × 10-3). More interestingly, by adding dFNC information, the model achieved higher accuracy for predicting changes in the Hamilton Depression Rating Scale 24-item (HDRS24, t = 9.6434, p = 1.5 × 10-21). The predictive maps of clinical outcomes show a weakly negative correlation, indicating that the ECT-induced antidepressant outcomes and cognitive changes might be associated with different functional brain neuroplasticity. Discussion: The overall results reveal that dynamic FC is not redundant but reflects mechanisms of ECT that cannot be captured by its static counterpart, especially for the prediction of antidepressant efficacy. Tracking the predictive signatures of static and dynamic FC will help maximize antidepressant outcomes and cognitive safety with individualized ECT dosing.
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Affiliation(s)
- Zening Fu
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia Institute of Technology, Georgia State University, Emory University, Atlanta, GA, United States,*Correspondence: Christopher C. Abbott, ; Zening Fu,
| | - Christopher C. Abbott
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, United States,*Correspondence: Christopher C. Abbott, ; Zening Fu,
| | - Jing Sui
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia Institute of Technology, Georgia State University, Emory University, Atlanta, GA, United States,State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Vince D. Calhoun
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia Institute of Technology, Georgia State University, Emory University, Atlanta, GA, United States,Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, United States
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9
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Qi S, Calhoun VD, Zhang D, Miller J, Deng ZD, Narr KL, Sheline Y, McClintock SM, Jiang R, Yang X, Upston J, Jones T, Sui J, Abbott CC. Links between electroconvulsive therapy responsive and cognitive impairment multimodal brain networks in late-life major depressive disorder. BMC Med 2022; 20:477. [PMID: 36482369 PMCID: PMC9733153 DOI: 10.1186/s12916-022-02678-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Although electroconvulsive therapy (ECT) is an effective treatment for depression, ECT cognitive impairment remains a major concern. The neurobiological underpinnings and mechanisms underlying ECT antidepressant and cognitive impairment effects remain unknown. This investigation aims to identify ECT antidepressant-response and cognitive-impairment multimodal brain networks and assesses whether they are associated with the ECT-induced electric field (E-field) with an optimal pulse amplitude estimation. METHODS A single site clinical trial focused on amplitude (600, 700, and 800 mA) included longitudinal multimodal imaging and clinical and cognitive assessments completed before and immediately after the ECT series (n = 54) for late-life depression. Another two independent validation cohorts (n = 84, n = 260) were included. Symptom and cognition were used as references to supervise fMRI and sMRI fusion to identify ECT antidepressant-response and cognitive-impairment multimodal brain networks. Correlations between ECT-induced E-field within these two networks and clinical and cognitive outcomes were calculated. An optimal pulse amplitude was estimated based on E-field within antidepressant-response and cognitive-impairment networks. RESULTS Decreased function in the superior orbitofrontal cortex and caudate accompanied with increased volume in medial temporal cortex showed covarying functional and structural alterations in both antidepressant-response and cognitive-impairment networks. Volume increases in the hippocampal complex and thalamus were antidepressant-response specific, and functional decreases in the amygdala and hippocampal complex were cognitive-impairment specific, which were validated in two independent datasets. The E-field within these two networks showed an inverse relationship with HDRS reduction and cognitive impairment. The optimal E-filed range as [92.7-113.9] V/m was estimated to maximize antidepressant outcomes without compromising cognitive safety. CONCLUSIONS The large degree of overlap between antidepressant-response and cognitive-impairment networks challenges parameter development focused on precise E-field dosing with new electrode placements. The determination of the optimal individualized ECT amplitude within the antidepressant and cognitive networks may improve the treatment benefit-risk ratio. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02999269.
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Affiliation(s)
- Shile Qi
- College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
| | - Vince D Calhoun
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
| | - Daoqiang Zhang
- College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Jeremy Miller
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Katherine L Narr
- Departments of Neurology, Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
| | - Yvette Sheline
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - Shawn M McClintock
- Division of Psychology, Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Rongtao Jiang
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Xiao Yang
- Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Joel Upston
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Tom Jones
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Jing Sui
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
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10
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Miller J, Jones T, Upston J, Deng ZD, McClintock SM, Ryman S, Quinn D, Abbott CC. Ictal Theta Power as an Electroconvulsive Therapy Safety Biomarker: A Pilot Study. J ECT 2022; 38:88-94. [PMID: 35613008 PMCID: PMC10680084 DOI: 10.1097/yct.0000000000000812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Electroconvulsive therapy (ECT) remains the benchmark for treatment resistant depression, yet its cognitive adverse effects have a negative impact on treatment. A predictive safety biomarker early in ECT treatment is needed to identify patients at cognitive risk to maximize therapeutic outcomes and minimize adverse effects. We used ictal electroencephalography frequency analysis from suprathreshold treatments to assess the relationships between ECT dose, ictal power across different frequency domains, and cognitive outcomes. METHODS Seventeen subjects with treatment resistant depression received right unilateral ECT. Structural magnetic resonance imaging was obtained pre-ECT for electric field modeling to assess ECT dose. Serial assessments with 24-lead electroencephalography captured ictal activity. Clinical and cognitive assessments were performed before and after ECT. The primary cognitive outcome was the change in Delis Kaplan Executive Function Verbal Fluency Letter Fluency. RESULTS Ictal theta (4-8 Hz) power in the Fp1/Fp2 channels was associated with both whole-brain electric field strength (t(2,12) = 19.5, P = 0.007)/(t(2,10) = 21.85, P = 0.02) and Delis Kaplan Executive Function Verbal Fluency Letter Fluency scores (t(2,12) = -2.05, P = 0.05)/(t(2,10) = -2.20, P = 0.01). Other frequency bands (beta, alpha, delta, and gamma) did not demonstrate this relationship. CONCLUSIONS This pilot data identify ictal theta power as a potential safety biomarker in ECT and is related to the strength of the ECT dose. Ictal theta power could prove to be a convenient and powerful tool for clinicians to identify those patients most susceptible to cognitive impairment early in the treatment series. Additional studies are needed to assess the role of longitudinal changes in ictal theta power throughout the ECT series.
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Affiliation(s)
- Jeremy Miller
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Tom Jones
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Joel Upston
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
- Duke Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Shawn M. McClintock
- Division of Psychology, Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
- Duke Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | | | - Davin Quinn
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Christopher C. Abbott
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, NM, USA
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11
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Deng ZD, Argyelan M, Miller J, Quinn DK, Lloyd M, Jones TR, Upston J, Erhardt E, McClintock SM, Abbott CC. Electroconvulsive therapy, electric field, neuroplasticity, and clinical outcomes. Mol Psychiatry 2022; 27:1676-1682. [PMID: 34853404 PMCID: PMC9095458 DOI: 10.1038/s41380-021-01380-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 01/08/2023]
Abstract
Electroconvulsive therapy (ECT) remains the gold-standard treatment for patients with depressive episodes, but the underlying mechanisms for antidepressant response and procedure-induced cognitive side effects have yet to be elucidated. Such mechanisms may be complex and involve certain ECT parameters and brain regions. Regarding parameters, the electrode placement (right unilateral or bitemporal) determines the geometric shape of the electric field (E-field), and amplitude determines the E-field magnitude in select brain regions (e.g., hippocampus). Here, we aim to determine the relationships between hippocampal E-field strength, hippocampal neuroplasticity, and antidepressant and cognitive outcomes. We used hippocampal E-fields and volumes generated from a randomized clinical trial that compared right unilateral electrode placement with different pulse amplitudes (600, 700, and 800 mA). Hippocampal E-field strength was variable but increased with each amplitude arm. We demonstrated a linear relationship between right hippocampal E-field and right hippocampal neuroplasticity. Right hippocampal neuroplasticity mediated right hippocampal E-field and antidepressant outcomes. In contrast, right hippocampal E-field was directly related to cognitive outcomes as measured by phonemic fluency. We used receiver operating characteristic curves to determine that the maximal right hippocampal E-field associated with cognitive safety was 112.5 V/m. Right hippocampal E-field strength was related to the whole-brain ratio of E-field strength per unit of stimulation current, but this whole-brain ratio was unrelated to antidepressant or cognitive outcomes. We discuss the implications of optimal hippocampal E-field dosing to maximize antidepressant outcomes and cognitive safety with individualized amplitudes.
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Affiliation(s)
- Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Miklos Argyelan
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, NY, USA
- Center for Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA
- Zucker School of Medicine at Hofstra/Northwell, Department of Psychiatry, Hempstead, NY, USA
| | - Jeremy Miller
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Davin K Quinn
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Megan Lloyd
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Thomas R Jones
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Joel Upston
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, USA
| | - Erik Erhardt
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA
| | - Shawn M McClintock
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
- Division of Psychology, Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
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12
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Regenold WT, Deng ZD, Lisanby SH. Noninvasive neuromodulation of the prefrontal cortex in mental health disorders. Neuropsychopharmacology 2022; 47:361-372. [PMID: 34272471 PMCID: PMC8617166 DOI: 10.1038/s41386-021-01094-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 06/22/2021] [Accepted: 06/29/2021] [Indexed: 02/06/2023]
Abstract
More than any other brain region, the prefrontal cortex (PFC) gives rise to the singularity of human experience. It is therefore frequently implicated in the most distinctly human of all disorders, those of mental health. Noninvasive neuromodulation, including electroconvulsive therapy (ECT), repetitive transcranial magnetic stimulation (rTMS), and transcranial direct current stimulation (tDCS) among others, can-unlike pharmacotherapy-directly target the PFC and its neural circuits. Direct targeting enables significantly greater on-target therapeutic effects compared with off-target adverse effects. In contrast to invasive neuromodulation approaches, such as deep-brain stimulation (DBS), noninvasive neuromodulation can reversibly modulate neural activity from outside the scalp. This combination of direct targeting and reversibility enables noninvasive neuromodulation to iteratively change activity in the PFC and its neural circuits to reveal causal mechanisms of both disease processes and healthy function. When coupled with neuronavigation and neurophysiological readouts, noninvasive neuromodulation holds promise for personalizing PFC neuromodulation to relieve symptoms of mental health disorders by optimizing the function of the PFC and its neural circuits. ClinicalTrials.gov Identifier: NCT03191058.
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Affiliation(s)
- William T. Regenold
- grid.416868.50000 0004 0464 0574Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD USA
| | - Zhi-De Deng
- grid.416868.50000 0004 0464 0574Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD USA
| | - Sarah H. Lisanby
- grid.416868.50000 0004 0464 0574Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD USA
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13
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Jiang J, Li J, Xu Y, Zhang B, Sheng J, Liu D, Wang W, Yang F, Guo X, Li Q, Zhang T, Tang Y, Jia Y, Daskalakis ZJ, Wang J, Li C. Magnetic Seizure Therapy Compared to Electroconvulsive Therapy for Schizophrenia: A Randomized Controlled Trial. Front Psychiatry 2021; 12:770647. [PMID: 34899429 PMCID: PMC8656219 DOI: 10.3389/fpsyt.2021.770647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 10/29/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Magnetic seizure therapy (MST) is a potential alternative to electroconvulsive therapy (ECT). However, reports on the use of MST for patients with schizophrenia, particularly in developing countries, which is a main indication for ECT, are limited. Methods: From February 2017 to July 2018, 79 inpatients who met the DSM-5 criteria for schizophrenia were randomized to receive 10 sessions of MST (43 inpatients) or ECT (36 inpatients) over the course of 4 weeks. At baseline and 4-week follow-up, the Positive and Negative Syndrome Scale (PANSS) and the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) were used to assess symptom severity and cognitive functions, respectively. Results: Seventy-one patients who completed at least half of the treatment protocol were included in the per-protocol analysis. MST generated a non-significant larger antipsychotic effect in terms of a reduction in PANSS total score [g = 0.17, 95% confidence interval (CI) = -0.30, 0.63] and response rate [relative risk (RR) = 1.41, 95% CI = 0.83-2.39]. Twenty-four participants failed to complete the cognitive assessment as a result of severe psychotic symptoms. MST showed significant less cognitive impairment over ECT in terms of immediate memory (g = 1.26, 95% CI = 0.63-1.89), language function (g =1.14, 95% CI = 0.52-1.76), delayed memory (g = 0.75, 95% CI = 0.16-1.35), and global cognitive function (g = 1.07, 95% CI = 0.45-1.68). The intention-to-treat analysis generated similar results except for the differences in delayed memory became statistically insignificant. Better baseline cognitive performance predicted MST and ECT response. Conclusions: Compared to bitemporal ECT with brief pulses and age-dose method, MST had similar antipsychotic efficacy with fewer cognitive impairments, indicating that MST is a promising alternative to ECT as an add-on treatment for schizophrenia. Clinical Trial Registration: ClinicalTrials.gov, identifier: NCT02746965.
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Affiliation(s)
- Jiangling Jiang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin Li
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanhong Xu
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bin Zhang
- Psychological and Psychiatric Neuroimage Lab, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jianhua Sheng
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dengtang Liu
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenzheng Wang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fuzhong Yang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoyun Guo
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qingwei Li
- Department of Psychiatry, Tongji Hospital of Tongji University, Shanghai, China
| | - Tianhong Zhang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yingying Tang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuping Jia
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zafiris J. Daskalakis
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, United States
| | - Jijun Wang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Psychology and Behavioral Science, Shanghai Jiao Tong University, Shanghai, China
- Center for Excellence in Brain Science and Intelligence Technology (CEBSIT), Chinese Academy of Science, Shanghai, China
- Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Chunbo Li
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Psychology and Behavioral Science, Shanghai Jiao Tong University, Shanghai, China
- Center for Excellence in Brain Science and Intelligence Technology (CEBSIT), Chinese Academy of Science, Shanghai, China
- Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
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14
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Fridgeirsson EA, Deng ZD, Denys D, van Waarde JA, van Wingen GA. Electric field strength induced by electroconvulsive therapy is associated with clinical outcome. Neuroimage Clin 2021; 30:102581. [PMID: 33588322 PMCID: PMC7895836 DOI: 10.1016/j.nicl.2021.102581] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/31/2022]
Abstract
The clinical effect of electroconvulsive therapy (ECT) is mediated by eliciting a generalized seizure, which is achieved by applying electrical current to the head via scalp electrodes. The anatomy of the head influences the distribution of current flow in each brain region. Here, we investigated whether individual differences in simulated local electrical field strength are associated with ECT efficacy. We modeled the electric field of 67 depressed patients receiving ECT. Patient's T1 magnetic resonance images were segmented, conductivities were assigned to each tissue and the finite element method was used to solve for the electric field induced by the electrodes. We investigated the correlation between modelled electric field and ECT outcome using voxel-wise general linear models. The difference between bilateral (BL) and right unilateral (RUL) electrode placement was striking. Even within electrode configuration, there was substantial variability between patients. For the modeled BL placement, stronger electric field strengths appeared in the left hemisphere and part of the right temporal lobe. Importantly, a stronger electric field in the temporal lobes was associated with less optimal ECT response in patients treated with BL-ECT. No significant differences in electric field distributions were found between responders and non-responders to RUL-ECT. These results suggest that overstimulation of the temporal lobes during BL stimulation has negative consequences on treatment outcome. If replicated, individualized pre-ECT computer-modelled electric field distributions may inform the development of patient-specific ECT protocols.
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Affiliation(s)
- Egill Axfjord Fridgeirsson
- Department of Psychiatry, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands
| | - Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health, United States
| | - Damiaan Denys
- Department of Psychiatry, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, Amsterdam, the Netherlands; The Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands
| | | | - Guido A van Wingen
- Department of Psychiatry, Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands.
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15
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Youssef NA, McCall WV, Ravilla D, McCloud L, Rosenquist PB. Double-Blinded Randomized Pilot Clinical Trial Comparing Cognitive Side Effects of Standard Ultra-Brief Right Unilateral ECT to 0.5 A Low Amplitude Seizure Therapy (LAP-ST). Brain Sci 2020; 10:E979. [PMID: 33322138 PMCID: PMC7763063 DOI: 10.3390/brainsci10120979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/10/2020] [Accepted: 12/10/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Concerns over cognitive side effects (CSE) of electroconvulsive therapy (ECT) still limit its broader usage for treatment-resistant depression (TRD). The objectives of this study were to (1) examine the CSE of Low Amplitude Seizure Therapy (LAP-ST) at 0.5 A compared to Ultra-brief Right Unilateral (UB-RUL) ECT using Time to Reorientation (TRO) as the main acute primary outcome, and (2) to compare effects on depressive symptoms between the two treatment groups. METHODS Participants were referred for ECT, consented for the study, and were randomized to a course of LAP-ST or standard UB-RUL ECT. TRO and depression were measured by the Montgomery-Åsberg Depression Rating Scale (MADRS). RESULTS Eleven patients consented. Of these, eight with a current major depressive episode (MDE) of unipolar or bipolar disorders were randomized. TRO was faster for the LAP-ST (mean = 6.8 min; SE = 4.9) than standard RUL ECT (mean = 15.5 min; SE = 6.5). Depression improved similarly in the two arms of the study from baseline (MADRS: LAP-ST = 41.0; SE = 2.0, RUL = 39.0; SE = 3.8) to endpoint (MADRS score: LAP-ST = 8.0; SE7.2, RUL = 9.5; SE = 3.8). CONCLUSIONS This pilot, randomized and blinded clinical trial, suggests that the LAP-ST (at 0.5 A) has faster reorientation and possibly lower CSE compared to standard RUL-UB ECT. Caution is advised in interpreting these results due to the small sample size of this pilot study. Thus, future studies with similar design are warranted for replicating these findings.
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Affiliation(s)
- Nagy A. Youssef
- Department of Psychiatry and Health Behavior, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (W.V.M.); (D.R.); (L.M.); (P.B.R.)
- Eisenhower Army Medical Center, Department of Behavioral Health, Fort Gordon, GA 30905 USA
| | - William V. McCall
- Department of Psychiatry and Health Behavior, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (W.V.M.); (D.R.); (L.M.); (P.B.R.)
| | - Dheeraj Ravilla
- Department of Psychiatry and Health Behavior, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (W.V.M.); (D.R.); (L.M.); (P.B.R.)
| | - Laryssa McCloud
- Department of Psychiatry and Health Behavior, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (W.V.M.); (D.R.); (L.M.); (P.B.R.)
| | - Peter B. Rosenquist
- Department of Psychiatry and Health Behavior, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (W.V.M.); (D.R.); (L.M.); (P.B.R.)
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16
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Lefebvre-Demers M, Doyon N, Fecteau S. Non-invasive neuromodulation for tinnitus: A meta-analysis and modeling studies. Brain Stimul 2020; 14:113-128. [PMID: 33276156 DOI: 10.1016/j.brs.2020.11.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/07/2020] [Accepted: 11/15/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Patients with tinnitus often have poor quality of life, as well as severe anxiety and depression. New approaches to treat tinnitus are needed. OBJECTIVE Evaluate the effects of non-invasive neuromodulation on tinnitus through a metaanalysis and modeling study. The main hypothesis was that real as compared to sham neuromodulation that decreases tinnitus will modulate regions in line with the neurobiological models of tinnitus. METHODS AND RESULTS The systematic review, conducted from Pubmed, Cochrane and PsycINFO databases, showed that active as compared to sham repetitive transcranial magnetic stimulation (rTMS) reduced tinnitus, but active and sham transcranial direct current stimulation did not significantly differ. Further, rTMS over the auditory cortex was the most effective protocol. The modeling results indicate that this rTMS protocol elicited the strongest electric fields in the insula. Also, rTMS was particularly beneficial in women. Finally, the placebo effects were highly variable, highlighting the importance of conducting sham-controlled trials. CONCLUSION In sum, neuromodulation protocols that target the auditory cortex and the insula may hold clinical potential to treat tinnitus.
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Affiliation(s)
- Mathilde Lefebvre-Demers
- CERVO Brain Research Centre, Institut Universitaire En Santé Mentale de Québec, Centre Intégré Universitaire De Santé Et De Services Sociaux De La Capitale-Nationale, Canada; Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval, Canada
| | - Nicolas Doyon
- CERVO Brain Research Centre, Institut Universitaire En Santé Mentale de Québec, Centre Intégré Universitaire De Santé Et De Services Sociaux De La Capitale-Nationale, Canada; Faculty of Science and Engineering, Université Laval, Canada
| | - Shirley Fecteau
- CERVO Brain Research Centre, Institut Universitaire En Santé Mentale de Québec, Centre Intégré Universitaire De Santé Et De Services Sociaux De La Capitale-Nationale, Canada; Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval, Canada.
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Lisanby SH, McClintock SM, Alexopoulos G, Bailine SH, Bernhardt E, Briggs MC, Cullum CM, Deng ZD, Dooley M, Geduldig ET, Greenberg RM, Husain MM, Kaliora S, Knapp RG, Latoussakis V, Liebman LS, McCall WV, Mueller M, Petrides G, Prudic J, Rosenquist PB, Rudorfer MV, Sampson S, Teklehaimanot AA, Tobias KG, Weiner RD, Young RC, Kellner CH. Neurocognitive Effects of Combined Electroconvulsive Therapy (ECT) and Venlafaxine in Geriatric Depression: Phase 1 of the PRIDE Study. Am J Geriatr Psychiatry 2020; 28:304-316. [PMID: 31706638 PMCID: PMC7050408 DOI: 10.1016/j.jagp.2019.10.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/04/2019] [Accepted: 10/04/2019] [Indexed: 11/16/2022]
Abstract
OBJECTIVE There is limited information regarding the tolerability of electroconvulsive therapy (ECT) combined with pharmacotherapy in elderly adults with major depressive disorder (MDD). Addressing this gap, we report acute neurocognitive outcomes from Phase 1 of the Prolonging Remission in Depressed Elderly (PRIDE) study. METHODS Elderly adults (age ≥60) with MDD received an acute course of 6 times seizure threshold right unilateral ultrabrief pulse (RUL-UB) ECT. Venlafaxine was initiated during the first treatment week and continued throughout the study. A comprehensive neurocognitive battery was administered at baseline and 72 hours following the last ECT session. Statistical significance was defined as a two-sided p-value of less than 0.05. RESULTS A total of 240 elderly adults were enrolled. Neurocognitive performance acutely declined post ECT on measures of psychomotor and verbal processing speed, autobiographical memory consistency, short-term verbal recall and recognition of learned words, phonemic fluency, and complex visual scanning/cognitive flexibility. The magnitude of change from baseline to end for most neurocognitive measures was modest. CONCLUSION This is the first study to characterize the neurocognitive effects of combined RUL-UB ECT and venlafaxine in elderly adults with MDD and provides new evidence for the tolerability of RUL-UB ECT in an elderly sample. Of the cognitive domains assessed, only phonemic fluency, complex visual scanning, and cognitive flexibility qualitatively declined from low average to mildly impaired. While some acute changes in neurocognitive performance were statistically significant, the majority of the indices as based on the effect sizes remained relatively stable.
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Affiliation(s)
- Sarah H. Lisanby
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC (Now at the National Institute of Mental Health),Noninvasive Neuromodulation Unit, Experimental Therapeutics Branch, Intramural Research Program, National Institute of Mental Health
| | - Shawn M. McClintock
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC (Now at the National Institute of Mental Health),Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX
| | - George Alexopoulos
- Department of Psychiatry and Behavioral Sciences, New York Presbyterian/Weill Cornell Medical Center, White Plains, NY
| | - Samuel H. Bailine
- Department of Psychiatry, Zucker Hillside Hospital/North Shore-LIJ Health System, New York, NY
| | | | - Mimi C. Briggs
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY
| | - C. Munro Cullum
- Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX
| | - Zhi-De Deng
- Noninvasive Neuromodulation Unit, Experimental Therapeutics Branch, Intramural Research Program, National Institute of Mental Health
| | - Mary Dooley
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Emma T. Geduldig
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY
| | | | - Mustafa M. Husain
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC (Now at the National Institute of Mental Health),Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX
| | - Styliani Kaliora
- Department of Psychiatry, Zucker Hillside Hospital/North Shore-LIJ Health System, New York, NY
| | - Rebecca G. Knapp
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Vassilios Latoussakis
- Department of Psychiatry and Behavioral Sciences, New York Presbyterian/Weill Cornell Medical Center, White Plains, NY
| | - Lauren S. Liebman
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY
| | - William V. McCall
- Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta University, Augusta, GA
| | - Martina Mueller
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Georgios Petrides
- Department of Psychiatry, Zucker Hillside Hospital/North Shore-LIJ Health System, New York, NY
| | - Joan Prudic
- Department of Psychiatry, Columbia University/New York State Psychiatric Institute, New York, NY
| | - Peter B. Rosenquist
- Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta University, Augusta, GA
| | - Matthew V. Rudorfer
- Division of Services and Intervention Research, National Institute of Mental Health, National Institutes of Health, Bethesda, MD
| | - Shirlene Sampson
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN
| | - Abeba A. Teklehaimanot
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Kristen G. Tobias
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Richard D. Weiner
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC
| | - Robert C. Young
- Department of Psychiatry and Behavioral Sciences, New York Presbyterian/Weill Cornell Medical Center, White Plains, NY
| | - Charles H. Kellner
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY
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18
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Kayser S, Bewernick BH, Wagner S, Schlaepfer TE. Effects of magnetic seizure therapy on anterograde and retrograde amnesia in treatment-resistant depression. Depress Anxiety 2020; 37:125-133. [PMID: 31682325 DOI: 10.1002/da.22958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/17/2019] [Accepted: 08/20/2019] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Electroconvulsive therapy (ECT) is the gold standard for treatment-resistant depression (TRD). However, cognitive side effects, mainly anterograde and retrograde amnesia, frequently occur. Magnetic seizure therapy (MST) is tested using more focal seizure induction. However, the suggestion MST may be more beneficial than ECT because it causes fewer amnesia have not yet been comprehensively investigated using common neuropsychological testing specifically for ECT. We aimed to examine whether MST causes anterograde and retrograde amnesia. METHODS Ten patients with TRD were treated with MST (8.9 [2] treatments) at 100% machine output, a frequency of 100 Hz and 657.4 (62) pulses per train. The short form of the Autobiographical Memory Inventory was administered to test retrograde amnesia. Furthermore, an extended neuropsychological test battery, including verbal and nonverbal recall as well as recognition tasks, was used. RESULTS We observed changes in retrograde amnesia, although they were not clinically relevant (mean: -0.42 ± 0.14). Furthermore, no anterograde amnesia as well as no effects on global cognitive status, attention, language, and executive functions after MST were measured. CONCLUSIONS The cognitive safety and efficacy of MST in patients with TRD were indicated. However, the main limitations of the present study were the small sample and as a consequence, the low statistical power to detect changes after treatment. Therefore, our findings require replication in further studies. In addition, a direct comparison between MST and ECT in a larger sample should be performed before MST can be discussed as an alternative treatment approach to ECT in clinical practice.
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Affiliation(s)
- Sarah Kayser
- Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany.,Department of Psychiatry and Psychotherapy, University Medical Center, Mainz, Germany
| | - Bettina H Bewernick
- Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany.,Department of Geriatric Psychiatry and Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany
| | - Stefanie Wagner
- Department of Psychiatry and Psychotherapy, University Medical Center, Mainz, Germany
| | - Thomas E Schlaepfer
- Department of Geriatric Psychiatry and Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany.,Division of Interventional Biological Psychiatry, University Hospital Freiburg, Freiburg, Germany.,Departments of Psychiatry and Mental Health, The Johns Hopkins University, Baltimore, Maryland
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19
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Jiang J, Truong DQ, Esmaeilpour Z, Huang Y, Badran BW, Bikson M. Enhanced tES and tDCS computational models by meninges emulation. J Neural Eng 2020; 17:016027. [PMID: 31689695 PMCID: PMC7254922 DOI: 10.1088/1741-2552/ab549d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Understanding how current reaches the brain during transcranial electrical stimulation (tES) underpins efforts to rationalize outcomes and optimize interventions. To this end, computational models of current flow relate applied dose to brain electric field. Conventional tES modeling considers distinct tissues like scalp, skull, cerebrospinal fluid (CSF), gray matter and white matter. The properties of highly conductive CSF are especially important. However, modeling the space between skull and brain as entirely CSF is not an accurate representation of anatomy. The space conventionally modeled as CSF is approximately half meninges (dura, arachnoid, and pia) with lower conductivity. However, the resolution required to describe individual meningeal layers is computationally restrictive in an MRI-derived head model. Emulating the effect of meninges through CSF conductivity modification could improve accuracy with minimal cost. APPROACH Models with meningeal layers were developed in a concentric sphere head model. Then, in a model with only CSF between skull and brain, CSF conductivity was optimized to emulate the effect of meningeal layers on cortical electric field for multiple electrode positions. This emulated conductivity was applied to MRI-derived models. MAIN RESULTS Compared to a model with conventional CSF conductivity (1.65 S m-1), emulated CSF conductivity (0.85 S m-1) produced voltage fields better correlated with intracranial recordings from epilepsy patients. SIGNIFICANCE Conventional tES models have been validated using intracranial recording. Residual errors may nonetheless impact model utility. Because CSF is so conductive to current flow, misrepresentation of the skull-brain interface as entirely CSF is not realistic for tES modeling. Updating the conventional model with a CSF conductivity emulating the effect of the meninges enhances modeling accuracy without increasing model complexity. This allows existing modeling pipelines to be leveraged with a simple conductivity change. Using 0.85 S m-1 emulated CSF conductivity is recommended as the new standard in non-invasive brain stimulation modeling.
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Affiliation(s)
- Jimmy Jiang
- Department of Biomedical Engineering, Neural Engineering Laboratory, City College of New York of the City University of New York, New York, NY 10031, United States of America. Authors contributed equally
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20
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Argyelan M, Oltedal L, Deng ZD, Wade B, Bikson M, Joanlanne A, Sanghani S, Bartsch H, Cano M, Dale AM, Dannlowski U, Dols A, Enneking V, Espinoza R, Kessler U, Narr KL, Oedegaard KJ, Oudega ML, Redlich R, Stek ML, Takamiya A, Emsell L, Bouckaert F, Sienaert P, Pujol J, Tendolkar I, van Eijndhoven P, Petrides G, Malhotra AK, Abbott C. Electric field causes volumetric changes in the human brain. eLife 2019; 8:49115. [PMID: 31644424 PMCID: PMC6874416 DOI: 10.7554/elife.49115] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/22/2019] [Indexed: 12/13/2022] Open
Abstract
Recent longitudinal neuroimaging studies in patients with electroconvulsive therapy (ECT) suggest local effects of electric stimulation (lateralized) occur in tandem with global seizure activity (generalized). We used electric field (EF) modeling in 151 ECT treated patients with depression to determine the regional relationships between EF, unbiased longitudinal volume change, and antidepressant response across 85 brain regions. The majority of regional volumes increased significantly, and volumetric changes correlated with regional electric field (t = 3.77, df = 83, r = 0.38, p=0.0003). After controlling for nuisance variables (age, treatment number, and study site), we identified two regions (left amygdala and left hippocampus) with a strong relationship between EF and volume change (FDR corrected p<0.01). However, neither structural volume changes nor electric field was associated with antidepressant response. In summary, we showed that high electrical fields are strongly associated with robust volume changes in a dose-dependent fashion. Electroconvulsive therapy, or ECT for short, can be an effective treatment for severe depression. Many patients who do not respond to medication find that their symptoms improve after ECT. During an ECT session, the patient is placed under general anesthesia and two electrodes are attached to the scalp to produce an electric field that generates currents within the brain. These currents activate neurons and make them fire, causing a seizure, but it remains unclear how this reduces symptoms of depression. For many years, researchers thought that the induced seizure must be key to the beneficial effects of ECT, but recent studies have cast doubt on this idea. They show that increasing the strength of the electric field alters the clinical effects of ECT, without affecting the seizure. This suggests that the benefits of ECT depend on the electric field itself. Argyelan et al. now show that electric fields affect the brain by making a part of the brain known as the gray matter expand. In a large multinational study, 151 patients with severe depression underwent brain scans before and after a course of ECT. The scans revealed that the gray matter of the patients’ brains expanded during the treatment. The patients who experienced the strongest electric fields showed the largest increase in brain volume, and individual brain areas expanded if the electric field within them exceeded a certain threshold. This effect was particularly striking in two areas, the hippocampus and the amygdala. Both of these areas are critical for mood and memory. Further studies are needed to determine why the brain expands after ECT, and how long the effect lasts. Another puzzle is why the improvements in depression that the patients reported after their treatment did not correlate with changes in brain volume. Disentangling the relationships between ECT, brain volume and depression will ultimately help develop more robust treatments for this disabling condition.
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Affiliation(s)
- Miklos Argyelan
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, United States.,Center for Neuroscience, Feinstein Institute for Medical Research, Manhasset, United States.,Department of Psychiatry, Zucker School of Medicine, Hempstead, United States
| | - Leif Oltedal
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Department of Radiology, Haukeland University Hospital, Mohn Medical Imaging and Visualization Centre, Bergen, Norway
| | - Zhi-De Deng
- Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, United States
| | - Benjamin Wade
- Department of Neurology, Ahmanson-Lovelace Brain Mapping Center, University of California, Los Angeles, Los Angeles, United States
| | - Marom Bikson
- Department of Biomedical Engineering, The City College of the City University of New York, New York, United States
| | - Andrea Joanlanne
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, United States
| | - Sohag Sanghani
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, United States
| | - Hauke Bartsch
- Department of Radiology, Haukeland University Hospital, Mohn Medical Imaging and Visualization Centre, Bergen, Norway.,Center for Multimodal Imaging and Genetics, University of California, San Diego, San Diego, United States
| | - Marta Cano
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain.,CIBERSAM, Carlos III Health Institute, Barcelona, Spain
| | - Anders M Dale
- Center for Multimodal Imaging and Genetics, University of California, San Diego, San Diego, United States.,Department of Radiology, University of California, San Diego, San Diego, United States.,Department of Neurosciences, University of California, San Diego, San Diego, United States
| | - Udo Dannlowski
- Department of Psychiatry and Psychotherapy, University of Muenster, Muenster, Germany
| | - Annemiek Dols
- Department of Psychiatry, Amsterdam UMC, location VUmc, GGZinGeest, Old Age Psychiatry, Amsterdam Neuroscience, Amsterdam, Netherlands
| | - Verena Enneking
- Department of Psychiatry and Psychotherapy, University of Muenster, Muenster, Germany
| | - Randall Espinoza
- Department of Neurology, University of California, Los Angeles, Los Angeles, United States.,Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, United States
| | - Ute Kessler
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Division of Psychiatry, Haukeland University Hospital, University of Bergen, Bergen, Norway
| | - Katherine L Narr
- Department of Neurology, University of California, Los Angeles, Los Angeles, United States.,Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, United States
| | - Ketil J Oedegaard
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Division of Psychiatry, Haukeland University Hospital, University of Bergen, Bergen, Norway
| | - Mardien L Oudega
- Department of Psychiatry, Amsterdam UMC, location VUmc, GGZinGeest, Old Age Psychiatry, Amsterdam Neuroscience, Amsterdam, Netherlands
| | - Ronny Redlich
- Department of Psychiatry and Psychotherapy, University of Muenster, Muenster, Germany
| | - Max L Stek
- Department of Psychiatry, Amsterdam UMC, location VUmc, GGZinGeest, Old Age Psychiatry, Amsterdam Neuroscience, Amsterdam, Netherlands
| | - Akihiro Takamiya
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan.,Center for Psychiatry and Behavioral Science, Komagino Hospital, Tokyo, Japan
| | - Louise Emsell
- Department of Geriatric Psychiatry, University Psychiatric Center, KU Leuven, Leuven, Belgium
| | - Filip Bouckaert
- Department of Geriatric Psychiatry, University Psychiatric Center, KU Leuven, Leuven, Belgium.,Academic center for ECT and Neurostimulation (AcCENT), University Psychiatric Center, KU Leuven, Kortenberg, Belgium
| | - Pascal Sienaert
- Academic center for ECT and Neurostimulation (AcCENT), University Psychiatric Center, KU Leuven, Kortenberg, Belgium
| | - Jesus Pujol
- CIBERSAM, Carlos III Health Institute, Barcelona, Spain.,MRI Research Unit, Department of Radiology, Hospital del Mar, Barcelona, Spain
| | - Indira Tendolkar
- Department of Psychiatry, Radboud University Medical Center, Nijmegen, Netherlands.,Donders Institute for Brain Cognition and Behavior, Centre for Cognitive Neuroimaging, Nijmegen, Netherlands.,Faculty of Medicine and LVR Clinic for Psychiatry and Psychotherapy, University of Duisburg-Essen, Essen, Germany
| | - Philip van Eijndhoven
- Department of Psychiatry, Radboud University Medical Center, Nijmegen, Netherlands.,Donders Institute for Brain Cognition and Behavior, Centre for Cognitive Neuroimaging, Nijmegen, Netherlands
| | - Georgios Petrides
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, United States.,Center for Neuroscience, Feinstein Institute for Medical Research, Manhasset, United States.,Department of Psychiatry, Zucker School of Medicine, Hempstead, United States
| | - Anil K Malhotra
- Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, United States.,Center for Neuroscience, Feinstein Institute for Medical Research, Manhasset, United States.,Department of Psychiatry, Zucker School of Medicine, Hempstead, United States
| | - Christopher Abbott
- Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque, United States
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21
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Goetz SM, Kozyrkov IC, Luber B, Lisanby SH, Murphy DLK, Grill WM, Peterchev AV. Accuracy of robotic coil positioning during transcranial magnetic stimulation. J Neural Eng 2019; 16:054003. [PMID: 31189147 DOI: 10.1088/1741-2552/ab2953] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Robotic positioning systems for transcranial magnetic stimulation (TMS) promise improved accuracy and stability of coil placement, but there is limited data on their performance. Investigate the usability, accuracy, and limitations of robotic coil placement with a commercial system, ANT Neuro, in a TMS study. APPROACH 21 subjects underwent a total of 79 TMS sessions corresponding to 160 hours under robotic coil control. Coil position and orientation were monitored concurrently through an additional neuronavigation system. MAIN RESULTS Robot setup took on average 14.5 min. The robot achieved low position and orientation error with median 3.54 mm (overall, 1.34 mm without coil-head spacing) and 3.48°. The error increased over time at a rate of 0.4%/minute for both position and orientation. SIGNIFICANCE Robotic TMS systems can provide accurate and stable coil position and orientation in long TMS sessions. Lack of pressure feedback and of manual adjustment of all coil degrees of freedom were limitations of this robotic system.
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Affiliation(s)
- Stefan M Goetz
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC 27710, United States of America. Department of Neurosurgery, Duke University, Durham, NC 27710, United States of America. Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, United States of America
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22
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Caulfield KA, George MS. How long would a single session of maximum settings electroconvulsive therapy (ECT) power a 60W lightbulb? Brain Stimul 2019; 12:1612-1613. [PMID: 31431392 DOI: 10.1016/j.brs.2019.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 08/05/2019] [Accepted: 08/07/2019] [Indexed: 11/29/2022] Open
Affiliation(s)
- Kevin A Caulfield
- Brain Stimulation Laboratory, Medical University of South Carolina, 67 President St, Charleston, SC, 29425, USA.
| | - Mark S George
- Brain Stimulation Laboratory, Medical University of South Carolina, 67 President St, Charleston, SC, 29425, USA; Ralph H. Johnson VA Medical Center, Charleston, SC, 29425, USA
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23
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McClintock SM, Kallioniemi E, Martin DM, Kim JU, Weisenbach SL, Abbott CC. A Critical Review and Synthesis of Clinical and Neurocognitive Effects of Noninvasive Neuromodulation Antidepressant Therapies. FOCUS (AMERICAN PSYCHIATRIC PUBLISHING) 2019; 17:18-29. [PMID: 31975955 PMCID: PMC6493152 DOI: 10.1176/appi.focus.20180031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
There is a plethora of current and emerging antidepressant therapies in the psychiatric armamentarium for the treatment of major depressive disorder. Noninvasive neuromodulation therapies are one such therapeutic category; they typically involve the transcranial application of electrical or magnetic stimulation to modulate cortical and subcortical brain activity. Although electroconvulsive therapy (ECT) has been used since the 1930s, with the prevalence of major depressive disorder and treatment-resistant depression (TRD), the past three decades have seen a proliferation of noninvasive neuromodulation antidepressant therapeutic development. The purpose of this critical review was to synthesize information regarding the clinical effects, neurocognitive effects, and possible mechanisms of action of noninvasive neuromodulation therapies, including ECT, transcranial magnetic stimulation, magnetic seizure therapy, and transcranial direct current stimulation. Considerable research has provided substantial information regarding their antidepressant and neurocognitive effects, but their mechanisms of action remain unknown. Although the four therapies vary in how they modulate neurocircuitry and their resultant antidepressant and neurocognitive effects, they are nonetheless useful for patients with acute and chronic major depressive disorder and TRD. Continued research is warranted to inform dosimetry, algorithm for administration, and integration among the noninvasive neuromodulation therapies and with other antidepressant strategies to continue to maximize their safety and antidepressant benefit.
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Affiliation(s)
- Shawn M McClintock
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
| | - Elisa Kallioniemi
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
| | - Donel M Martin
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
| | - Joseph U Kim
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
| | - Sara L Weisenbach
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
| | - Christopher C Abbott
- Neurocognitive Research Laboratory, Department of Psychiatry, University of Texas (UT) Southwestern Medical Center, Dallas, Texas (McClintock, Kallioniemi, Martin); Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, North Carolina (McClintock); Black Dog Institute, Sydney, Australia, and School of Psychiatry, University of New South Wales, Sydney (Martin); Department of Psychiatry, University of Utah School of Medicine, Salt Lake City (Kim, Weisenbach); VA Salt Lake City, Mental Health Program (Weisenbach); Department of Psychiatry, University of New Mexico School of Medicine, Albuquerque (Abbott)
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Bikson M, Brunoni AR, Charvet LE, Clark VP, Cohen LG, Deng ZD, Dmochowski J, Edwards DJ, Frohlich F, Kappenman ES, Lim KO, Loo C, Mantovani A, McMullen DP, Parra LC, Pearson M, Richardson JD, Rumsey JM, Sehatpour P, Sommers D, Unal G, Wassermann EM, Woods AJ, Lisanby SH. Rigor and reproducibility in research with transcranial electrical stimulation: An NIMH-sponsored workshop. Brain Stimul 2018; 11:465-480. [PMID: 29398575 PMCID: PMC5997279 DOI: 10.1016/j.brs.2017.12.008] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 12/01/2017] [Accepted: 12/21/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Neuropsychiatric disorders are a leading source of disability and require novel treatments that target mechanisms of disease. As such disorders are thought to result from aberrant neuronal circuit activity, neuromodulation approaches are of increasing interest given their potential for manipulating circuits directly. Low intensity transcranial electrical stimulation (tES) with direct currents (transcranial direct current stimulation, tDCS) or alternating currents (transcranial alternating current stimulation, tACS) represent novel, safe, well-tolerated, and relatively inexpensive putative treatment modalities. OBJECTIVE This report seeks to promote the science, technology and effective clinical applications of these modalities, identify research challenges, and suggest approaches for addressing these needs in order to achieve rigorous, reproducible findings that can advance clinical treatment. METHODS The National Institute of Mental Health (NIMH) convened a workshop in September 2016 that brought together experts in basic and human neuroscience, electrical stimulation biophysics and devices, and clinical trial methods to examine the physiological mechanisms underlying tDCS/tACS, technologies and technical strategies for optimizing stimulation protocols, and the state of the science with respect to therapeutic applications and trial designs. RESULTS Advances in understanding mechanisms, methodological and technological improvements (e.g., electronics, computational models to facilitate proper dosing), and improved clinical trial designs are poised to advance rigorous, reproducible therapeutic applications of these techniques. A number of challenges were identified and meeting participants made recommendations made to address them. CONCLUSIONS These recommendations align with requirements in NIMH funding opportunity announcements to, among other needs, define dosimetry, demonstrate dose/response relationships, implement rigorous blinded trial designs, employ computational modeling, and demonstrate target engagement when testing stimulation-based interventions for the treatment of mental disorders.
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Affiliation(s)
- Marom Bikson
- Department of Biomedical Engineering, The City College of the City University of New York, United States
| | - Andre R Brunoni
- Laboratory of Neurosciences (LIM-27), Department and Institute of Psychiatry, University of Sao Paulo, Sao Paulo, Brazil
| | - Leigh E Charvet
- Department of Neurology, New York University School of Medicine, New York, NY, United States
| | - Vincent P Clark
- Department of Psychology, University of New Mexico, Albuquerque, NM, United States
| | - Leonardo G Cohen
- Human Cortical Physiology and Neurorehabilitation Section, National Institute of Neurological Disorders and Stroke, Bethesda, MD, United States
| | - Zhi-De Deng
- Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, United States
| | - Jacek Dmochowski
- Department of Biomedical Engineering, The City College of the City University of New York, United States
| | - Dylan J Edwards
- Non-invasive Brain Stimulation and Human Motor Control Laboratory, Burke Rehabilitation and Research, Burke-Cornell Medical Research Facility, White Plains, New York and School of Medicine and Health Sciences, Edith Cowan University, Perth, Australia
| | - Flavio Frohlich
- Department of Psychiatry, Cell Biology and Physiology, Biomedical Engineering, and Neurology, Carolina Center for Neurostimulation, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Emily S Kappenman
- Department of Psychology, San Diego State University, San Diego, CA, United States
| | - Kelvin O Lim
- Department of Psychiatry, University of Minnesota, Minneapolis Veterans Administration Health Care System, and Defense Veterans Brain Injury Center, Minneapolis, MN, United States
| | - Colleen Loo
- School of Psychiatry and Black Dog Institute, University of New South Wales, Sydney, Australia
| | - Antonio Mantovani
- Department of Physiology, Pharmacology and Neuroscience, City College of the City University of New York, New York, NY, United States
| | - David P McMullen
- Division of Translational Research, National Institute of Mental Health, Bethesda, MD, United States
| | - Lucas C Parra
- Department of Biomedical Engineering, The City College of the City University of New York, United States
| | - Michele Pearson
- Division of Translational Research, National Institute of Mental Health, Bethesda, MD, United States
| | - Jessica D Richardson
- Department of Speech and Hearing Sciences, University of New Mexico, Albuquerque, NM, United States
| | - Judith M Rumsey
- Division of Translational Research, National Institute of Mental Health, Bethesda, MD, United States.
| | - Pejman Sehatpour
- Department of Psychiatry, Columbia University, New York, NY, United States
| | - David Sommers
- Scientific Review Branch, National Institute of Mental Health, Bethesda, MD, United States
| | - Gozde Unal
- Department of Biomedical Engineering, The City College of the City University of New York, United States
| | - Eric M Wassermann
- Behavioral Neurology Unit, National Institute of Neurological Disorders and Stroke, Bethesda, MD, United States
| | - Adam J Woods
- Department of Clinical and Health Psychology, Center for Cognitive Aging and Memory, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
| | - Sarah H Lisanby
- Division of Translational Research, National Institute of Mental Health, Bethesda, MD, United States
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Marques do Carmo D, Costa MH. Online approximation of the multichannel Wiener filter with preservation of interaural level difference for binaural hearing-aids. Comput Biol Med 2018; 95:188-197. [PMID: 29505947 DOI: 10.1016/j.compbiomed.2018.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/06/2018] [Accepted: 02/20/2018] [Indexed: 10/18/2022]
Abstract
This work presents an online approximation method for the multichannel Wiener filter (MWF) noise reduction technique with preservation of the noise interaural level difference (ILD) for binaural hearing-aids. The steepest descent method is applied to a previously proposed MWF-ILD cost function to both approximate the optimal linear estimator of the desired speech and keep the subjective perception of the original acoustic scenario. The computational cost of the resulting algorithm is estimated in terms of multiply and accumulate operations, whose number can be controlled by setting the number of iterations at each time frame. Simulation results for the particular case of one speech and one-directional noise source show that the proposed method increases the signal-to-noise ratio SNR of the originally acquired speech by up to 16.9 dB in the assessed scenarios. As compared to the online implementation of the conventional MWF technique, the proposed technique provides a reduction of up to 7 dB in the noise ILD error at the price of a reduction of up 3 dB in the output SNR. Subjective experiments with volunteers complement these objective measures with psychoacoustic results, which corroborate the expected spatial preservation of the original acoustic scenario. The proposed method allows practical online implementation of the MWF-ILD noise reduction technique under constrained computational resources. Predicted SNR improvements from 12 dB to 16.9 dB can be obtained in application-specific integrated circuits for hearing-aids and state-of-the-art digital signal processors.
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Affiliation(s)
- Diego Marques do Carmo
- Department of Electrical and Electronic Engineering, Federal University of Santa Catarina, Florianópolis-SC, 88040-900, Brazil.
| | - Márcio Holsbach Costa
- Department of Electrical and Electronic Engineering, Federal University of Santa Catarina, Florianópolis-SC, 88040-900, Brazil.
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Wang B, Shen MR, Deng ZD, Smith JE, Tharayil JJ, Gurrey CJ, Gomez LJ, Peterchev AV. Redesigning existing transcranial magnetic stimulation coils to reduce energy: application to low field magnetic stimulation. J Neural Eng 2018; 15:036022. [PMID: 29300001 DOI: 10.1088/1741-2552/aaa505] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To present a systematic framework and exemplar for the development of a compact and energy-efficient coil that replicates the electric field (E-field) distribution induced by an existing transcranial magnetic stimulation coil. APPROACH The E-field generated by a conventional low field magnetic stimulation (LFMS) coil was measured for a spherical head model and simulated in both spherical and realistic head models. Then, using a spherical head model and spatial harmonic decomposition, a spherical-shaped cap coil was synthesized such that its windings conformed to a spherical surface and replicated the E-field on the cortical surface while requiring less energy. A prototype coil was built and electrically characterized. The effect of constraining the windings to the upper half of the head was also explored via an alternative coil design. MAIN RESULTS The LFMS E-field distribution resembled that of a large double-cone coil, with a peak field strength around 350 mV m-1 in the cortex. The E-field distributions of the cap coil designs were validated against the original coil, with mean errors of 1%-3%. The cap coil required as little as 2% of the original coil energy and was significantly smaller in size. SIGNIFICANCE The redesigned LFMS coil is substantially smaller and more energy-efficient than the original, improving cost, power consumption, and portability. These improvements could facilitate deployment of LFMS in the clinic and potentially at home. This coil redesign approach can also be applied to other magnetic stimulation paradigms. Finally, the anatomically-accurate E-field simulation of LFMS can be used to interpret clinical LFMS data.
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Affiliation(s)
- Boshuo Wang
- Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC 27710, United States of America
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Lee WH, Lisanby SH, Laine AF, Peterchev AV. Minimum Electric Field Exposure for Seizure Induction with Electroconvulsive Therapy and Magnetic Seizure Therapy. Neuropsychopharmacology 2017; 42:1192-1200. [PMID: 27934961 PMCID: PMC5437889 DOI: 10.1038/npp.2016.276] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 11/05/2016] [Accepted: 12/04/2016] [Indexed: 11/09/2022]
Abstract
Lowering and individualizing the current amplitude in electroconvulsive therapy (ECT) has been proposed as a means to produce stimulation closer to the neural activation threshold and more focal seizure induction, which could potentially reduce cognitive side effects. However, the effect of current amplitude on the electric field (E-field) in the brain has not been previously linked to the current amplitude threshold for seizure induction. We coupled MRI-based E-field models with amplitude titrations of motor threshold (MT) and seizure threshold (ST) in four nonhuman primates (NHPs) to determine the strength, distribution, and focality of stimulation in the brain for four ECT electrode configurations (bilateral, bifrontal, right-unilateral, and frontomedial) and magnetic seizure therapy (MST) with cap coil on vertex. At the amplitude-titrated ST, the stimulated brain subvolume (23-63%) was significantly less than for conventional ECT with high, fixed current (94-99%). The focality of amplitude-titrated right-unilateral ECT (25%) was comparable to cap coil MST (23%), demonstrating that ECT with a low current amplitude and focal electrode placement can induce seizures with E-field as focal as MST, although these electrode and coil configurations affect differently specific brain regions. Individualizing the current amplitude reduced interindividual variation in the stimulation focality by 40-53% for ECT and 26% for MST, supporting amplitude individualization as a means of dosing especially for ECT. There was an overall significant correlation between the measured amplitude-titrated ST and the prediction of the E-field models, supporting a potential role of these models in dosing of ECT and MST. These findings may guide the development of seizure therapy dosing paradigms with improved risk/benefit ratio.
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Affiliation(s)
- Won H Lee
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sarah H Lisanby
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA,Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Andrew F Laine
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Angel V Peterchev
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA,Department of Biomedical Engineering, Duke University, Durham, NC, USA,Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA,Department of Psychiatry and Behavioral Sciences, Duke University, Box 3620 DUMC, Durham, NC 27710, USA, Tel: 919 684 0383, Fax: 919 681 9962, E-mail:
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Goetz SM, Deng ZD. The development and modelling of devices and paradigms for transcranial magnetic stimulation. Int Rev Psychiatry 2017; 29:115-145. [PMID: 28443696 PMCID: PMC5484089 DOI: 10.1080/09540261.2017.1305949] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 03/03/2017] [Accepted: 03/09/2017] [Indexed: 12/20/2022]
Abstract
Magnetic stimulation is a non-invasive neurostimulation technique that can evoke action potentials and modulate neural circuits through induced electric fields. Biophysical models of magnetic stimulation have become a major driver for technological developments and the understanding of the mechanisms of magnetic neurostimulation and neuromodulation. Major technological developments involve stimulation coils with different spatial characteristics and pulse sources to control the pulse waveform. While early technological developments were the result of manual design and invention processes, there is a trend in both stimulation coil and pulse source design to mathematically optimize parameters with the help of computational models. To date, macroscopically highly realistic spatial models of the brain, as well as peripheral targets, and user-friendly software packages enable researchers and practitioners to simulate the treatment-specific and induced electric field distribution in the brains of individual subjects and patients. Neuron models further introduce the microscopic level of neural activation to understand the influence of activation dynamics in response to different pulse shapes. A number of models that were designed for online calibration to extract otherwise covert information and biomarkers from the neural system recently form a third branch of modelling.
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Affiliation(s)
- Stefan M Goetz
- a Department of Psychiatry & Behavioral Sciences, Division for Brain Stimulation & Neurophysiology , Duke University , Durham , NC , USA
- b Department of Electrical & Computer Engineering , Duke University , Durham , NC , USA
- c Department of Neurosurgery , Duke University , Durham , NC , USA
| | - Zhi-De Deng
- a Department of Psychiatry & Behavioral Sciences, Division for Brain Stimulation & Neurophysiology , Duke University , Durham , NC , USA
- d Intramural Research Program, Experimental Therapeutics & Pathophysiology Branch, Noninvasive Neuromodulation Unit , National Institutes of Health, National Institute of Mental Health , Bethesda , MD , USA
- e Duke Institute for Brain Sciences , Duke University , Durham , NC , USA
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Radman T, Lisanby SH. New directions in the rational design of electrical and magnetic seizure therapies: individualized Low Amplitude Seizure Therapy (iLAST) and Magnetic Seizure Therapy (MST). Int Rev Psychiatry 2017; 29:63-78. [PMID: 28430533 DOI: 10.1080/09540261.2017.1304898] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Electroconvulsive therapy remains a key treatment option for severe cases of depression, but undesirable side-effects continue to limit its use. Innovations in the design of novel seizure therapies seek to improve its risk benefit ratio through enhanced control of the focality of stimulation. The design of seizure therapies with increased spatial precision is motivated by avoiding stimulation of deep brain structures implicated in memory retention, including the hippocampus. The development of two innovations in seizure therapy-individualized low-amplitude seizure therapy (iLAST) and magnetic seizure therapy (MST), are detailed. iLAST is a method of seizure titration involving reducing current spread in the brain by titrating current amplitude from the traditional fixed amplitudes. MST, which can be used in conjunction with iLAST dosing methods, involves the use of magnetic stimulation to reduce shunting and spreading of current by the scalp occurring during electrical stimulation. Evidence is presented on the rationale for increasing the focality of ECT in hopes of preserving its effectiveness, while reducing cognitive side-effects. Finally, the value of electric field and neural modelling is illustrated to explain observed clinical effects of modifications to ECT technique, and their utility in the rational design of the next generation of seizure therapies.
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Affiliation(s)
- Thomas Radman
- a National Institute of Mental Health , Bethesda , MD , USA
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Expanded Safety and Efficacy Data for a New Method of Performing Electroconvulsive Therapy: Focal Electrically Administered Seizure Therapy. J ECT 2016; 32:197-203. [PMID: 27379790 PMCID: PMC5058644 DOI: 10.1097/yct.0000000000000328] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Electroconvulsive therapy (ECT) is the most rapid and effective antidepressant treatment but with concerns about cognitive adverse effects. A new form of ECT, focal electrically administered seizure therapy (FEAST), was designed to increase the focality of stimulation and better match stimulus parameters with neurophysiology. We recently reported on the safety and feasibility of FEAST in a cohort (n = 17) of depressed patients. We now report on the safety, feasibility, preliminary efficacy, and cognitive effects of FEAST in a new cohort. METHODS Open-label FEAST was administered to 20 depressed adults (6 men; 3 with bipolar disorder; age 49.1 ± 10.6 years). Clinical and cognitive assessments were obtained at baseline and end of course. Time to orientation recovery was assessed at each treatment. Nonresponders switched to conventional ECT. RESULTS Participants tolerated the treatment well with no dropouts. Five patients (25%) transitioned from FEAST to conventional ECT due to inadequate response. After FEAST (mean, 9.3 ± 3.5 sessions; range, 4-14), there was a 58.1% ± 36.0% improvement in Hamilton Rating Scale for Depression scores compared with that in the baseline (P < 0.0001); 13 (65%) of 20 patients met response criteria, and 11 (55%) of 20 met remission criteria. Patients achieved reorientation (4 of 5 items) in 4.4 ± 3.0 minutes (median, 4.5 minutes), timed from eyes opening. There was no deterioration in neuropsychological measures. CONCLUSIONS These findings provide further support for the safety and efficacy of FEAST. The remission and response rates were in the range found using conventional ECT, and the time to reorientation may be quicker. However, without a randomized comparison group, conclusions are tentative.
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Sanz-Fuentenebro FJ. Stimulus characteristics in electroconvulsive therapy. A pragmatic review. REVISTA DE PSIQUIATRIA Y SALUD MENTAL 2016; 11:36-47. [PMID: 27569402 DOI: 10.1016/j.rpsm.2016.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 06/07/2016] [Accepted: 06/30/2016] [Indexed: 12/28/2022]
Abstract
The process of normalization electroconvulsive therapy (ECT) requires, among other actions, disseminating the latest information on this technique. One of the most complex aspects is the electrical stimulus, whose knowledge should be spread and put into practice. In this paper we review the available information about frequency and number of ECT sessions, and efficacy of each electrode placement. We also present two approaches to determine the ECT charge: stimulus titration versus age-based method; and the limitations of the summary metrics of charge, being necessary to expand our knowledge of the parameters that configure the stimulus: duration, current amplitude frequency and pulse width.
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Affiliation(s)
- Francisco Javier Sanz-Fuentenebro
- Hospital Universitario-Instituto de Investigación Hospital 12 de Octubre, Madrid, España; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), España.
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Lee WH, Lisanby SH, Laine AF, Peterchev AV. Comparison of electric field strength and spatial distribution of electroconvulsive therapy and magnetic seizure therapy in a realistic human head model. Eur Psychiatry 2016; 36:55-64. [PMID: 27318858 DOI: 10.1016/j.eurpsy.2016.03.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 03/04/2016] [Accepted: 03/06/2016] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND This study examines the strength and spatial distribution of the electric field induced in the brain by electroconvulsive therapy (ECT) and magnetic seizure therapy (MST). METHODS The electric field induced by standard (bilateral, right unilateral, and bifrontal) and experimental (focal electrically administered seizure therapy and frontomedial) ECT electrode configurations as well as a circular MST coil configuration was simulated in an anatomically realistic finite element model of the human head. Maps of the electric field strength relative to an estimated neural activation threshold were used to evaluate the stimulation strength and focality in specific brain regions of interest for these ECT and MST paradigms and various stimulus current amplitudes. RESULTS The standard ECT configurations and current amplitude of 800-900mA produced the strongest overall stimulation with median of 1.8-2.9 times neural activation threshold and more than 94% of the brain volume stimulated at suprathreshold level. All standard ECT electrode placements exposed the hippocampi to suprathreshold electric field, although there were differences across modalities with bilateral and right unilateral producing respectively the strongest and weakest hippocampal stimulation. MST stimulation is up to 9 times weaker compared to conventional ECT, resulting in direct activation of only 21% of the brain. Reducing the stimulus current amplitude can make ECT as focal as MST. CONCLUSIONS The relative differences in electric field strength may be a contributing factor for the cognitive sparing observed with right unilateral compared to bilateral ECT, and MST compared to right unilateral ECT. These simulations could help understand the mechanisms of seizure therapies and develop interventions with superior risk/benefit ratio.
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Affiliation(s)
- W H Lee
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - S H Lisanby
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC 27710, USA; Department of Psychology & Neuroscience, Duke University, Durham, NC 27708, USA; Department of Psychiatry, Columbia University, New York, NY 10032, USA; National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - A F Laine
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - A V Peterchev
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA.
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Peterchev AV, Krystal AD, Rosa MA, Lisanby SH. Individualized Low-Amplitude Seizure Therapy: Minimizing Current for Electroconvulsive Therapy and Magnetic Seizure Therapy. Neuropsychopharmacology 2015; 40:2076-84. [PMID: 25920013 PMCID: PMC4613599 DOI: 10.1038/npp.2015.122] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/31/2015] [Accepted: 04/24/2015] [Indexed: 11/09/2022]
Abstract
Electroconvulsive therapy (ECT) at conventional current amplitudes (800-900 mA) is highly effective but carries the risk of cognitive side effects. Lowering and individualizing the current amplitude may reduce side effects by virtue of a less intense and more focal electric field exposure in the brain, but this aspect of ECT dosing is largely unexplored. Magnetic seizure therapy (MST) induces a weaker and more focal electric field than ECT; however, the pulse amplitude is not individualized and the minimum amplitude required to induce a seizure is unknown. We titrated the amplitude of long stimulus trains (500 pulses) as a means of determining the minimum current amplitude required to induce a seizure with ECT (bilateral, right unilateral, bifrontal, and frontomedial electrode placements) and MST (round coil on vertex) in nonhuman primates. Furthermore, we investigated a novel method of predicting this amplitude-titrated seizure threshold (ST) by a non-convulsive measurement of motor threshold (MT) using single pulses delivered through the ECT electrodes or MST coil. Average STs were substantially lower than conventional pulse amplitudes (112-174 mA for ECT and 37.4% of maximum device amplitude for MST). ST was more variable in ECT than in MST. MT explained 63% of the ST variance and is hence the strongest known predictor of ST. These results indicate that seizures can be induced with less intense electric fields than conventional ECT that may be safer; efficacy and side effects should be evaluated in clinical studies. MT measurement could be a faster and safer alternative to empirical ST titration for ECT and MST.
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Affiliation(s)
- Angel V Peterchev
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA
| | - Andrew D Krystal
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
| | - Moacyr A Rosa
- Institute for Advanced Research in Neurostimulation, São Paulo, Brazil
| | - Sarah H Lisanby
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
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Lee WH, Lisanby SH, Laine AF, Peterchev AV. Electric Field Model of Transcranial Electric Stimulation in Nonhuman Primates: Correspondence to Individual Motor Threshold. IEEE Trans Biomed Eng 2015; 62:2095-105. [PMID: 25910001 DOI: 10.1109/tbme.2015.2425406] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To develop a pipeline for realistic head models of nonhuman primates (NHPs) for simulations of noninvasive brain stimulation, and use these models together with empirical threshold measurements to demonstrate that the models capture individual anatomical variability. METHODS Based on structural MRI data, we created models of the electric field (E-field) induced by right unilateral (RUL) electroconvulsive therapy (ECT) in four rhesus macaques. Individual motor threshold (MT) was measured with transcranial electric stimulation (TES) administered through the RUL electrodes in the same subjects. RESULTS The interindividual anatomical differences resulted in 57% variation in median E-field strength in the brain at fixed stimulus current amplitude. Individualization of the stimulus current by MT reduced the E-field variation in the target motor area by 27%. There was significant correlation between the measured MT and the ratio of simulated electrode current and E-field strength (r(2) = 0.95, p = 0.026). Exploratory analysis revealed significant correlations of this ratio with anatomical parameters including of the superior electrode-to-cortex distance, vertex-to-cortex distance, and brain volume (r(2) > 0.96, p < 0.02). The neural activation threshold was estimated to be 0.45 ±0.07 V/cm for 0.2-ms stimulus pulse width. CONCLUSION These results suggest that our individual-specific NHP E-field models appropriately capture individual anatomical variability relevant to the dosing of TES/ECT. These findings are exploratory due to the small number of subjects. SIGNIFICANCE This study can contribute insight in NHP studies of ECT and other brain stimulation interventions, help link the results to clinical studies, and ultimately lead to more rational brain stimulation dosing paradigms.
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Gálvez V, Hadzi-Pavlovic D, Smith D, Loo CK. Predictors of Seizure Threshold in Right Unilateral Ultrabrief Electroconvulsive Therapy: Role of Concomitant Medications and Anaesthesia Used. Brain Stimul 2015; 8:486-92. [PMID: 25683317 DOI: 10.1016/j.brs.2014.12.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND An individualized approach to maximize electroconvulsive therapy (ECT) efficacy and minimize cognitive side effects is to treat patients relative to their seizure threshold (ST). However, although Right Unilateral-Ultrabrief (0.3 ms) (RUL-UB) ECT is increasingly used in clinical settings as an effective form of ECT with minimal cognitive effects, there is sparse data regarding predictors of ST. OBJECTIVE To analyze the relationship between ST and clinical and demographic factors in a sample of patients treated with RUL-UB ECT. METHODS Clinical, demographic and ECT data from 179 patients in ECT research studies were examined. Seizure threshold was titrated at the first ECT session. ECT was performed with a Thymatron(®) or Mecta(®) device, with thiopentone (2.5-5 mg/kg) or propofol (1-2 mg/kg) anaesthesia. Medications taken at the time of ST titration were documented. The association between ST and candidate predictor variables was examined with regression analysis. RESULTS Multiple regression analyses showed that 34% of the variance in ST (P < 0.001) could be predicted. Older age (R(2) = 0.194, P < 0.001), propofol (vs thiopentone) (R(2) = 0.029, P ≤ 0.01) and higher anaesthetic dose (mg in propofol equivalents) (R(2) = 0.029, P < 0.05) were found to be predictors of higher initial ST. Treatment with lithium (R(2) = 0.043, P < 0.01) and study site (R(2) = 0.019, P < 0.05) significantly predicted lower initial ST. CONCLUSIONS Empirical titration is recommended for accurate determination of ST in patients receiving RUL-UB ECT. Novel findings of this study are that propofol anaesthesia resulted in higher ST than thiopentone and concomitant treatment with lithium treatment lowered ST.
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Affiliation(s)
- Verònica Gálvez
- School of Psychiatry, University of New South Wales (UNSW), Hospital Road, 2031, Randwick, Sydney, NSW, Australia; Black Dog Institute, Hospital Road, 2031, Randwick, Sydney, NSW Australia
| | - Dusan Hadzi-Pavlovic
- School of Psychiatry, University of New South Wales (UNSW), Hospital Road, 2031, Randwick, Sydney, NSW, Australia; Black Dog Institute, Hospital Road, 2031, Randwick, Sydney, NSW Australia
| | - Deidre Smith
- The Melbourne Clinic & Department of Psychiatry, University of Melbourne, Grattan St Parkville 3010, Melbourne, VIC, Australia
| | - Colleen K Loo
- School of Psychiatry, University of New South Wales (UNSW), Hospital Road, 2031, Randwick, Sydney, NSW, Australia; Black Dog Institute, Hospital Road, 2031, Randwick, Sydney, NSW Australia; Department of Psychiatry, St George Hospital, Level 2, James Laws House, Gray St, Kogarah 2217, Sydney, NSW, Australia.
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Deng ZD, McClintock SM, Oey NE, Luber B, Lisanby SH. Neuromodulation for mood and memory: from the engineering bench to the patient bedside. Curr Opin Neurobiol 2014; 30:38-43. [PMID: 25222617 DOI: 10.1016/j.conb.2014.08.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 08/29/2014] [Accepted: 08/29/2014] [Indexed: 12/28/2022]
Abstract
Brain stimulation, in the form of electroconvulsive therapy (ECT), has long been a gold standard treatment for depression, but today, the field of neuromodulation is rapidly changing with the advent of newer and more precise tools to alter neuroplasticity and to treat brain-based disorders. Now there are new means to induce focal seizures, as with magnetic seizure therapy (MST), or modifications to ECT. There are also surgical approaches to target brain circuits via implanted stimulators placed in the brain or on cranial nerves. Finally, there are noninvasive subconvulsive approaches for the transcranial application of either electric or magnetic fields. Collectively, these tools have transformed the face of neurotherapeutics and informed our understanding of the brain basis of complex neurobehavioral conditions.
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Affiliation(s)
- Zhi-De Deng
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Shawn M McClintock
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Nicodemus E Oey
- Duke-National University of Singapore Graduate Medical School, Singapore
| | - Bruce Luber
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
| | - Sarah H Lisanby
- Division of Brain Stimulation and Neurophysiology, Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA.
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