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Lehrer H, Dayan I, Elkayam K, Kfir A, Bierman U, Front L, Catz A, Aidinoff E. Responses to stimuli in the 'snoezelen' room in unresponsive wakefulness or in minimally responsive state. Brain Inj 2022; 36:1167-1175. [PMID: 35978560 DOI: 10.1080/02699052.2022.2110286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
BACKGROUND Sensory stimulation in Snoezelen room increased responsiveness after brain injury and dementia. OBJECTIVE To explore the physiological and clinical effects of Snoezelen stimulation in persons with unresponsive wakefulness syndrome or minimally conscious state (UWS or MCS). DESIGN A comparative prospective observational cohort study. METHODS Ten patients with UWS and 25 in MCS were exposed to consecutive stimuli involving the 5 senses in a Snoezelen room. Heart rate (HR) and cerebral blood flow velocity (CBFV), and scores of the Loewenstein communication scale (LCS) were obtained before and during or after the stimuli. RESULTS The stimuli increased HR values and decreased left hemisphere CBFV values in patients with MCS (p < 0.05). Stimulation increased LCS scores (from 28.48 ± 6.55 to 31.13 ± 7.14; p < 0.001) in patients with MCS, but not in the UWS group. LCS gain correlated with HR and right hemisphere CBFV gains in patients with MCS (r = 0.439 and 0.636 respectively, p < 0.05). CONCLUSIONS Snoezelen stimulation induced immediate improvement in communication and physiological changes in patients with MSC, and had a minor physiological effect in patients with UWS. If additional studies support these findings, it will be possible to suggest that Snoezelen stimulation can affect arousal, and possibly improve functioning.
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Affiliation(s)
- Hiela Lehrer
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Ilil Dayan
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Keren Elkayam
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Adi Kfir
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Uri Bierman
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Lilach Front
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel
| | - Amiram Catz
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel.,Sackler Faculty of Medicine, Rehabilitation Department, Tel Aviv University, Tel Aviv, Israel
| | - Elena Aidinoff
- Departments of Intensive Care for Consciousness Rehabilitation and Spinal Rehabilitation, Loewenstein Rehabilitation Medical Center, Raanana, Israel.,Sackler Faculty of Medicine, Rehabilitation Department, Tel Aviv University, Tel Aviv, Israel
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2
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Anbarlouei M, Emamikhah M, Basiri K, Farzanegan G. Perioperative routine EEG can reliably predict de novo seizures after supratentorial craniotomy. Neurol Sci 2021; 43:2717-2722. [PMID: 34741222 DOI: 10.1007/s10072-021-05697-y] [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: 09/22/2021] [Accepted: 10/25/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND The contributing risk factors in development of seizure after supratentorial craniotomy, the optimal duration of prophylactic antiepileptic therapy, the high-risk patient to treat, and the drug of choice are subjects of debate as is the gold standard diagnostic tool for patient screening. Combining routine electroencephalography (EEG) with clinical data to identify high-risk patients and determine the ideal time of recording after surgery was the goal of this study. METHODS In this prospective cohort, 59 patients were evaluated with three EEG recordings after different intervals of supratentorial craniotomy due to different etiologies and were followed for 9 months for development of seizures. Demographic and disease-related variables as well as EEG results were analyzed to determine the contributing risk factors for development of seizures. RESULTS Neoplastic etiology and abnormal perioperative EEG (performed before surgery or in the first postoperative week) were the only independent variables associated with development of de novo seizure. CONCLUSION Routine EEG in the perioperative period and neoplastic etiology are two independent powerful predictors of developing seizure after supratentorial craniotomy and may help deciding whether to continue prophylactic antiepileptic medications for an extended period or not.
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Affiliation(s)
- Mousareza Anbarlouei
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Department of Neurosurgery, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Maziar Emamikhah
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Rasoul Akram Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Kamal Basiri
- Department of Emergency Medicine, Prehospital and Hospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Gholamreza Farzanegan
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
- Department of Neurosurgery, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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3
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Otsubo H, Ogawa H, Pang E, Wong SM, Ibrahim GM, Widjaja E. A review of magnetoencephalography use in pediatric epilepsy: an update on best practice. Expert Rev Neurother 2021; 21:1225-1240. [PMID: 33780318 DOI: 10.1080/14737175.2021.1910024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Introduction: Magnetoencephalography (MEG) is a noninvasive technique that is used for presurgical evaluation of children with drug-resistant epilepsy (DRE).Areas covered: The contributions of MEG for localizing the epileptogenic zone are discussed, in particular in extra-temporal lobe epilepsy and focal cortical dysplasia, which are common in children, as well as in difficult to localize epilepsy such as operculo-insular epilepsy. Further, the authors review current evidence on MEG for mapping eloquent cortex, its performance, application in clinical practice, and potential challenges.Expert opinion: MEG could change the clinical management of children with DRE by directing placement of intracranial electrodes thereby enhancing their yield. With improved identification of a circumscribed epileptogenic zone, MEG could render more patients as suitable candidates for epilepsy surgery and increase utilization of surgery.
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Affiliation(s)
- Hiroshi Otsubo
- Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada
| | - Hiroshi Ogawa
- Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada
| | - Elizabeth Pang
- Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada.,Neuroscience and Mental Health, Hospital for Sick Children, Toronto, Canada
| | - Simeon M Wong
- Neuroscience and Mental Health, Hospital for Sick Children, Toronto, Canada
| | - George M Ibrahim
- Division of Neurosurgery, Hospital for Sick Children, Toronto, Canada.,Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada
| | - Elysa Widjaja
- Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada.,Neuroscience and Mental Health, Hospital for Sick Children, Toronto, Canada.,Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada
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4
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Bagić AI, Funke ME, Kirsch HE, Tenney JR, Zillgitt AJ, Burgess RC. The 10 Common Evidence-Supported Indications for MEG in Epilepsy Surgery: An Illustrated Compendium. J Clin Neurophysiol 2021; 37:483-497. [PMID: 33165222 DOI: 10.1097/wnp.0000000000000726] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Unfamiliarity with the indications for and benefits of magnetoencephalography (MEG) persists, even in the epilepsy community, and hinders its acceptance to clinical practice, despite the evidence. The wide treatment gap for patients with drug-resistant epilepsy and immense underutilization of epilepsy surgery had similar effects. Thus, educating referring physicians (epileptologists, neurologists, and neurosurgeons) both about the value of epilepsy surgery and about the potential benefits of MEG can achieve synergy and greatly improve the process of selecting surgical candidates. As a practical step toward a comprehensive educational process to benefit potential MEG users, current MEG referrers, and newcomers to MEG, the authors have elected to provide an illustrated guide to 10 everyday situations where MEG can help in the evaluation of people with drug-resistant epilepsy. They are as follows: (1) lacking or imprecise hypothesis regarding a seizure onset; (2) negative MRI with a mesial temporal onset suspected; (3) multiple lesions on MRI; (4) large lesion on MRI; (5) diagnostic or therapeutic reoperation; (6) ambiguous EEG findings suggestive of "bilateral" or "generalized" pattern; (7) intrasylvian onset suspected; (8) interhemispheric onset suspected; (9) insular onset suspected; and (10) negative (i.e., spikeless) EEG. Only their practical implementation and furtherance of personal and collective education will lead to the potentially impactful synergy of the two-MEG and epilepsy surgery. Thus, while fulfilling our mission as physicians, we must not forget that ignoring the wealth of evidence about the vast underutilization of epilepsy surgery - and about the usefulness and value of MEG in selecting surgical candidates - is far from benign neglect.
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Affiliation(s)
- Anto I Bagić
- University of Pittsburgh Comprehensive Epilepsy Center (UPCEC), Department of Neurology, University of Pittsburgh Medical Center (UPMC), Pittsburgh, Pennsylvania, U.S.A
| | - Michael E Funke
- MEG Center, McGovern Medical School, UT Houston, Houston, Texas, U.S.A
| | - Heidi E Kirsch
- UCSF Biomagnetic Imaging Laboratory, UCSF, San Francisco, California, U.S.A
| | - Jeffrey R Tenney
- MEG Center, Cincinnati Children's Hospital Medical Center , Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, U.S.A
| | - Andrew J Zillgitt
- Department of Neurology, Beaumont Health Adult Comprehensive Epilepsy Center, Neurosicence Center, Royal Oak, Michigan, U.S.A.; and
| | - Richard C Burgess
- Magnetoencephalography Laboratory, Cleveland Clinic Epilepsy Center, Cleveland, Ohio, U.S.A
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5
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Gibson RM, Owen AM, Cruse D. Brain-computer interfaces for patients with disorders of consciousness. PROGRESS IN BRAIN RESEARCH 2016; 228:241-91. [PMID: 27590972 DOI: 10.1016/bs.pbr.2016.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The disorders of consciousness refer to clinical conditions that follow a severe head injury. Patients diagnosed as in a vegetative state lack awareness, while patients diagnosed as in a minimally conscious state retain fluctuating awareness. However, it is a challenge to accurately diagnose these disorders with clinical assessments of behavior. To improve diagnostic accuracy, neuroimaging-based approaches have been developed to detect the presence or absence of awareness in patients who lack overt responsiveness. For the small subset of patients who retain awareness, brain-computer interfaces could serve as tools for communication and environmental control. Here we review the existing literature concerning the sensory and cognitive abilities of patients with disorders of consciousness with respect to existing brain-computer interface designs. We highlight the challenges of device development for this special population and address some of the most promising approaches for future investigations.
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Affiliation(s)
- R M Gibson
- The Brain and Mind Institute, University of Western Ontario, London, ON, Canada; University of Western Ontario, London, ON, Canada.
| | - A M Owen
- The Brain and Mind Institute, University of Western Ontario, London, ON, Canada; University of Western Ontario, London, ON, Canada
| | - D Cruse
- School of Psychology, University of Birmingham, Birmingham, United Kingdom
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6
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Gibson RM, Fernández-Espejo D, Gonzalez-Lara LE, Kwan BY, Lee DH, Owen AM, Cruse D. Multiple tasks and neuroimaging modalities increase the likelihood of detecting covert awareness in patients with disorders of consciousness. Front Hum Neurosci 2014; 8:950. [PMID: 25505400 PMCID: PMC4244609 DOI: 10.3389/fnhum.2014.00950] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 11/07/2014] [Indexed: 01/14/2023] Open
Abstract
Minimal or inconsistent behavioral responses to command make it challenging to accurately diagnose the level of awareness of a patient with a Disorder of consciousness (DOC). By identifying markers of mental imagery being covertly performed to command, functional neuroimaging (fMRI), electroencephalography (EEG) has shown that some of these patients are aware despite their lack of behavioral responsiveness. We report the findings of behavioral, fMRI, and EEG approaches to detecting command-following in a group of patients with DOC. From an initial sample of 14 patients, complete data across all tasks was obtained in six cases. Behavioral evaluations were performed with the Coma Recovery Scale—Revised. Both fMRI and EEG evaluations involved the completion of previously validated mental imagery tasks—i.e., motor imagery (EEG and fMRI) and spatial navigation imagery (fMRI). One patient exhibited statistically significant evidence of motor imagery in both the fMRI and EEG tasks, despite being unable to follow commands behaviorally. Two behaviorally non-responsive patients produced appropriate activation during the spatial navigation fMRI task. However, neither of these patients successfully completed the motor imagery tasks, likely due to specific motor area damage in at least one of these cases. A further patient demonstrated command following only in the EEG motor imagery task, and two patients did not demonstrate command following in any of the behavioral, EEG, or fMRI assessments. Due to the heterogeneity of etiology and pathology in this group, DOC patients vary in terms of their suitability for some forms of neuroimaging, the preservation of specific neural structures, and the cognitive resources that may be available to them. Assessments of a range of cognitive abilities supported by spatially-distinct brain regions and indexed by multiple neural signatures are therefore required in order to accurately characterize a patient's level of residual cognition and awareness.
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Affiliation(s)
- Raechelle M Gibson
- The Brain and Mind Institute, University of Western Ontario London, ON, Canada ; Department of Psychology, University of Western Ontario London, ON, Canada
| | | | | | - Benjamin Y Kwan
- Department of Medical Imaging, University of Western Ontario London, ON, Canada
| | - Donald H Lee
- Department of Medical Imaging, University of Western Ontario London, ON, Canada ; Department of Radiology, London Health Sciences Centre London, ON, Canada
| | - Adrian M Owen
- The Brain and Mind Institute, University of Western Ontario London, ON, Canada ; Department of Psychology, University of Western Ontario London, ON, Canada
| | - Damian Cruse
- The Brain and Mind Institute, University of Western Ontario London, ON, Canada
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Gindrat AD, Quairiaux C, Britz J, Brunet D, Lanz F, Michel CM, Rouiller EM. Whole-scalp EEG mapping of somatosensory evoked potentials in macaque monkeys. Brain Struct Funct 2014; 220:2121-42. [PMID: 24791748 PMCID: PMC4495608 DOI: 10.1007/s00429-014-0776-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 04/07/2014] [Indexed: 11/20/2022]
Abstract
High-density scalp EEG recordings are widely used to study whole-brain neuronal networks in humans non-invasively. Here, we validate EEG mapping of somatosensory evoked potentials (SSEPs) in macaque monkeys (Macaca fascicularis) for the long-term investigation of large-scale neuronal networks and their reorganisation after lesions requiring a craniotomy. SSEPs were acquired from 33 scalp electrodes in five adult anaesthetized animals after electrical median or tibial nerve stimulation. SSEP scalp potential maps were identified by cluster analysis and identified in individual recordings. A distributed, linear inverse solution was used to estimate the intracortical sources of the scalp potentials. SSEPs were characterised by a sequence of components with unique scalp topographies. Source analysis confirmed that median nerve SSEP component maps were in accordance with the somatotopic organisation of the sensorimotor cortex. Most importantly, SSEP recordings were stable both intra- and interindividually. We aim to apply this method to the study of recovery and reorganisation of large-scale neuronal networks following a focal cortical lesion requiring a craniotomy. As a prerequisite, the present study demonstrated that a 300-mm2 unilateral craniotomy over the sensorimotor cortex necessary to induce a cortical lesion, followed by bone flap repositioning, suture and gap plugging with calcium phosphate cement, did not induce major distortions of the SSEPs. In conclusion, SSEPs can be successfully and reproducibly recorded from high-density EEG caps in macaque monkeys before and after a craniotomy, opening new possibilities for the long-term follow-up of the cortical reorganisation of large-scale networks in macaque monkeys after a cortical lesion.
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Affiliation(s)
- Anne-Dominique Gindrat
- Domain of Physiology, Department of Medicine, Faculty of Sciences and Fribourg Center for Cognition, University of Fribourg, Chemin du Musée 5, 1700, Fribourg, Switzerland,
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8
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Lau S, Flemming L, Haueisen J. Magnetoencephalography signals are influenced by skull defects. Clin Neurophysiol 2013; 125:1653-62. [PMID: 24418220 DOI: 10.1016/j.clinph.2013.12.099] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 12/09/2013] [Accepted: 12/17/2013] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Magnetoencephalography (MEG) signals had previously been hypothesized to have negligible sensitivity to skull defects. The objective is to experimentally investigate the influence of conducting skull defects on MEG and EEG signals. METHODS A miniaturized electric dipole was implanted in vivo into rabbit brains. Simultaneous recording using 64-channel EEG and 16-channel MEG was conducted, first above the intact skull and then above a skull defect. Skull defects were filled with agar gels, which had been formulated to have tissue-like homogeneous conductivities. The dipole was moved beneath the skull defects, and measurements were taken at regularly spaced points. RESULTS The EEG signal amplitude increased 2-10 times, whereas the MEG signal amplitude reduced by as much as 20%. The EEG signal amplitude deviated more when the source was under the edge of the defect, whereas the MEG signal amplitude deviated more when the source was central under the defect. The change in MEG field-map topography (relative difference measure, RDM(∗)=0.15) was geometrically related to the skull defect edge. CONCLUSIONS MEG and EEG signals can be substantially affected by skull defects. SIGNIFICANCE MEG source modeling requires realistic volume conductor head models that incorporate skull defects.
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Affiliation(s)
- S Lau
- Institute of Biomedical Engineering and Informatics, Ilmenau University of Technology, P.O. Box 100565, D-98684 Ilmenau, Germany; Biomagnetic Center, Department of Neurology, Jena University Hospital, Erlanger Allee 101, D-07747 Jena, Germany; NeuroEngineering Laboratory, Department of Electrical & Electronic Engineering, The University of Melbourne, Parkville 3010, Australia; Department of Medicine - St. Vincent's Hospital, The University of Melbourne, Fitzroy 3057, Australia.
| | - L Flemming
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Erlanger Allee 101, D-07747 Jena, Germany; Department of Traumatology and Orthopedics, Robert-Koch-Hospital, Jenaer Straße 66, D-99510 Apolda, Germany
| | - J Haueisen
- Institute of Biomedical Engineering and Informatics, Ilmenau University of Technology, P.O. Box 100565, D-98684 Ilmenau, Germany; Biomagnetic Center, Department of Neurology, Jena University Hospital, Erlanger Allee 101, D-07747 Jena, Germany
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Brigo F, Cicero R, Fiaschi A, Bongiovanni LG. The breach rhythm. Clin Neurophysiol 2011; 122:2116-20. [DOI: 10.1016/j.clinph.2011.07.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2011] [Revised: 07/05/2011] [Accepted: 07/07/2011] [Indexed: 10/17/2022]
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10
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Mani R, Pollard J, Dichter MA. Human clinical trails in antiepileptogenesis. Neurosci Lett 2011; 497:251-6. [PMID: 21439351 DOI: 10.1016/j.neulet.2011.03.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 03/01/2011] [Accepted: 03/02/2011] [Indexed: 01/11/2023]
Abstract
Blocking the development of epilepsy (epileptogenesis) is a fundamental research area with the potential to provide large benefits to patients by avoiding the medical and social consequences that occur with epilepsy and lifelong therapy. Human clinical trials attempting to prevent epilepsy (antiepileptogenesis) have been few and universally unsuccessful to date. In this article, we review data about possible pathophysiological mechanisms underlying epileptogenesis, discuss potential interventions, and summarize prior antiepileptogenesis trials. Elements of ideal trials designs for successful antiepileptogenic intervention are suggested.
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Affiliation(s)
- Ram Mani
- Department of Neurology, University of Pennsylvania, United States
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Lin JS, Lew SM, Marcuccilli CJ, Mueller WM, Matthews AE, Koop JI, Zupanc ML. Corpus callosotomy in multistage epilepsy surgery in the pediatric population. J Neurosurg Pediatr 2011; 7:189-200. [PMID: 21284466 DOI: 10.3171/2010.11.peds10334] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The object of this study was to evaluate surgical outcome in a select group of patients with medically refractory epilepsy who had undergone corpus callosotomy combined with bilateral subdural electroencephalography (EEG) electrode placement as the initial step in multistage epilepsy surgery. METHODS A retrospective chart review of 18 children (ages 3.5-18 years) with medically refractory symptomatic generalized or localization-related epilepsy was undertaken. A corpus callosotomy with subdural bihemispheric EEG electrode placement was performed as the initial step in multistage epilepsy surgery. All of the patients had tonic and atonic seizures; 6 patients also experienced complex partial seizures. All of the patients had frequent generalized epileptiform discharges as well as multifocal independent epileptiform discharges on surface EEG monitoring. Most of the patients (94%) had either normal (44%) MR imaging studies of the brain or bihemispheric abnormalities (50%). One patient had a suspected unilateral lesion (prominent sylvian fissure). RESULTS Of the 18 patients who underwent corpus callosotomy and placement of subdural strips and grids, 12 progressed to further resection based on localizing data obtained during invasive EEG monitoring. The mean patient age was 10.9 years. The duration of invasive monitoring ranged from 3 to 14 days, and the follow-up ranged from 6 to 70 months (mean 35 months). Six (50%) of the 12 patients who had undergone resection had an excellent outcome (Engel Class I or II). There were no permanent neurological deficits or deaths. CONCLUSIONS The addition of invasive monitoring for patients undergoing corpus callosotomy for medically refractory epilepsy may lead to the localization of surgically amenable seizure foci, targeted resections, and improved seizure outcomes in a select group of patients typically believed to be candidates for palliative surgery alone.
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Affiliation(s)
- Jessica S Lin
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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