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Shah M, Goode D, Mohammadi H. Computational study and validation of a novel passive hand tremor attenuator. J Med Eng Technol 2022; 47:157-164. [PMID: 36282104 DOI: 10.1080/03091902.2022.2134482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tremors are a prevalent movement disorder due to a nervous system condition that leads to involuntary muscle movements observed in patients. This paper converts the tremorous anatomical human arm model to a single degree of freedom (SDOF) forced vibration problem. The mathematical modelling with Euler-Lagrange's equation is performed for the SDOF human arm model with two different potential vibration absorbers. A computational study is conducted on MATLAB Simulink by MathWorks Inc. (Natick, MA) to compare two absorbers, and the results are verified on the multibody dynamics simulation solution software, MSC Adams by Hexagon AB. It is concluded that the T beam-shaped vibration absorber represented a higher amplitude reduction, up to 80%, compared to the inertial mass absorber, which had an amplitude reduction of 65% over the range of frequencies. Experiments conducted with the T beam absorber prototype also support the computational findings. Future research focuses on designing an ergonomic wearable device with a proposed T-beam absorber that can passively attenuate the tremor at various frequencies.
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Affiliation(s)
- Manthan Shah
- The Heart Valve Performance Laboratory, School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, Canada
| | - Dylan Goode
- The Heart Valve Performance Laboratory, School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, Canada
| | - Hadi Mohammadi
- The Heart Valve Performance Laboratory, School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, Canada
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2
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Maesawa S, Nakatsubo D, Tsugawa T, Kato S, Shibata M, Takai S, Torii J, Ishizaki T, Wakabayashi T, Saito R. Techniques, Indications, and Outcomes in Magnetic Resonance-guided Focused Ultrasound Thalamotomy for Tremor. Neurol Med Chir (Tokyo) 2021; 61:629-639. [PMID: 34470990 PMCID: PMC8592814 DOI: 10.2176/nmc.ra.2021-0187] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Magnetic resonance (MR)-guided focused ultrasound surgery (MRgFUS) is the latest minimally invasive stereotactic procedure, and thalamotomy using this novel modality has demonstrated its effectiveness and safety, especially for patients with essential tremor (ET) and Parkinson's disease (PD). In Japan, the application of MRgFUS to treat ET and PD has recently been covered by health insurance. Technically, the transducer with 1024 elements emits ultrasound beams, which are then focused on the target with a phase control, resulting in optimal ablation by thermal coagulation. The technical advantages of MRgFUS are continuous intraoperative monitoring of clinical symptoms and MR images and fine adjustment of the target by the steering function. Postoperative tremor control is compatible with other modalities, although long-term follow-up is necessary. The adverse effects are usually transient and acceptable. Prognostic factors for good tremor control include high temperature and large lesion size. A high skull density ratio is a factor to achieve high temperature and large lesioning, but it may not be necessary and sufficient for clinical outcomes. For patients with advanced symptoms such as bilateral tremor or head/neck tremor, deep brain stimulation may be recommended because of the adjustability of stimulation and the possibility of bilateral treatment. Patients have high expectations of MRgFUS because of its non-invasiveness. To perform this treatment safely and effectively, physicians need to understand the technological aspects, the physiological principles. To choose the appropriate modality, physicians also should recognize the clinical advantages and disadvantages of MRgFUS compared to other modalities.
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Affiliation(s)
- Satoshi Maesawa
- Brain and Mind Research Center, Nagoya University
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
| | - Daisuke Nakatsubo
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
- Radiosurgery and Focused Ultrasound Surgery Center, Nagoya Kyoritsu Hospital
| | - Takahiko Tsugawa
- Radiosurgery and Focused Ultrasound Surgery Center, Nagoya Kyoritsu Hospital
| | - Sachiko Kato
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
- Radiosurgery and Focused Ultrasound Surgery Center, Nagoya Kyoritsu Hospital
| | - Masashi Shibata
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
- Radiosurgery and Focused Ultrasound Surgery Center, Nagoya Kyoritsu Hospital
| | - Sou Takai
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
| | - Jun Torii
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
| | - Tomotaka Ishizaki
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
- Department of Neurosurgery, Kainan Hospital
| | - Toshihiko Wakabayashi
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
- Radiosurgery and Focused Ultrasound Surgery Center, Nagoya Kyoritsu Hospital
| | - Ryuta Saito
- Department of Neurosurgery, Nagoya University Graduate School of Medicine
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Permezel F. Brain MRI-guided focused ultrasound conceptualised as a tool for brain network intervention. J Clin Neurosci 2021; 90:370-379. [PMID: 34275578 DOI: 10.1016/j.jocn.2021.05.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 05/02/2021] [Accepted: 05/27/2021] [Indexed: 11/25/2022]
Abstract
Magnetic resonance imaging guided high intensity focused ultrasound (HIFU) has emerged as a tool offering incisionless intervention on brain tissue. The low risk and rapid recovery from this procedure, in addition to the ability to assess for clinical benefit and adverse events intraprocedurally, makes it an ideal tool for intervention upon brain networks both for clinical and research applications. This review article proposes that conceptualising brain focused ultrasound as a tool for brain network intervention and adoption of methodology to complement this approach may result in better clinical outcomes, fewer adverse events and may unveil or allow treatment opportunities not otherwise possible. A brief introduction to network neuroscience is discussed before a description of pathological brain networks is provided for a number of conditions for which MRI-guided brain HIFU intervention has been implemented. Essential Tremor is discussed as the most advanced example of MRI-guided brain HIFU intervention adoption along with the issues that present with this treatment modality compared to alternatives. The brain network intervention paradigm is proposed to overcome these issues and a number of examples of implementation of this are discussed. The ability of low intensity MRI guided focussed ultrasound to neuromoduate brain tissue without lesioning is introduced. This tool is discussed with regards to its potential clinical application as well as its potential to further our understanding of network neuroscience via its ability to interrogate brain networks without damaging tissue. Finally, a number of current clinical trials utilising brain focused ultrasound are discussed, along with the additional applications available from the utilisation of low intensity focused ultrasound.
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Affiliation(s)
- Fiona Permezel
- Austin Hospital, Heidelberg, Victoria, Australia; The University of Melbourne, Parkville, Victoria, Australia; The Florey Institute of Neuroscience and Mental Health, Austin Hospital, Victoria, Australia.
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Martínez-Fernández R, Matarazzo M, Máñez-Miró JU, Obeso JA. The Role of Focused Ultrasound in the Management of Movement Disorders: Insights after 5 Years of Experience. Mov Disord Clin Pract 2021; 8:681-687. [PMID: 34307739 DOI: 10.1002/mdc3.13223] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/26/2021] [Accepted: 04/07/2021] [Indexed: 11/07/2022] Open
Affiliation(s)
- Raúl Martínez-Fernández
- HM CINAC (Centro Integral de Neurociencias Abarca Campal) Hospital Universitario HM Puerta del Sur, HM Hospitales Madrid Spain.,Network Center for Biomedical Research on Neurodegenerative Diseases Carlos III Institute Madrid Spain
| | - Michele Matarazzo
- HM CINAC (Centro Integral de Neurociencias Abarca Campal) Hospital Universitario HM Puerta del Sur, HM Hospitales Madrid Spain.,Network Center for Biomedical Research on Neurodegenerative Diseases Carlos III Institute Madrid Spain
| | - Jorge U Máñez-Miró
- HM CINAC (Centro Integral de Neurociencias Abarca Campal) Hospital Universitario HM Puerta del Sur, HM Hospitales Madrid Spain.,Network Center for Biomedical Research on Neurodegenerative Diseases Carlos III Institute Madrid Spain
| | - Jose A Obeso
- HM CINAC (Centro Integral de Neurociencias Abarca Campal) Hospital Universitario HM Puerta del Sur, HM Hospitales Madrid Spain.,Network Center for Biomedical Research on Neurodegenerative Diseases Carlos III Institute Madrid Spain
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Oh BH, Park YS. Ventralis oralis anterior (Voa) deep brain stimulation plus Gamma Knife thalamotomy in an elderly patient with essential tremor: A case report. Medicine (Baltimore) 2021; 100:e25461. [PMID: 33847653 PMCID: PMC8052051 DOI: 10.1097/md.0000000000025461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/18/2021] [Indexed: 01/04/2023] Open
Abstract
RATIONALE Deep brain stimulation (DBS) of the ventralis intermedius nucleus (Vim) provides a safe and effective therapy for medically refractory essential tremor (ET). However, DBS may be risky in elderly patients and those with ischemic brain lesions. Gamma Knife radiosurgery (GKS) is a minimally invasive procedure, but bilateral thalamotomy is dangerous. PATIENT CONCERNS We report a case of ventralis oralis anterior nucleus (Voa) DBS for dominant hand tremor plus Voa GKS for nondominant hand tremor in a very elderly patient with medically intractable ET. DIAGNOSIS An 83-year-old right-handed woman visited our hospital with a medically intractable ET. Because of the ischemic lesion in the right basal ganglia, we decided to perform left unilateral DBS instead of bilateral DBS. INTERVENTION We chose Voa as the target for DBS because, clinically, her tremor was mainly confined to her hands, and Voa had better intraoperative microelectrode recording results than Vim. OUTCOMES After 2 years, her right-hand tremor remained in an improved state, but she still had severe tremor in her left hand. Therefore, we performed GKS targeting the right Voa. One year after surgery, the patient's hand tremor successfully improved without any complications. LESSONS Salvage Voa GKS after unilateral Voa DBS is a valuable option for very elderly patients and patients with ischemic brain lesions. We suggest that Voa GKS thalamotomy is as useful and safe a surgical technique as Vim GKS for dystonic hand tremor. To the best of our knowledge, this is the first case report using salvage Voa as the only target for ET.
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Affiliation(s)
- Byeong Ho Oh
- Department of Neuroscience, Graduate School
- Department of Neurosurgery, Chungbuk National University Hospital, College of Medicine, Chungbuk National University
| | - Young Seok Park
- Department of Neuroscience, Graduate School
- Department of Neurosurgery, Chungbuk National University Hospital, College of Medicine, Chungbuk National University
- Department of Neurosurgery, Gamma Knife Icon Center, Chungbuk National University Hospital
- Institute for Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Republic of Korea
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Wang KL, Ren Q, Chiu S, Patel B, Meng FG, Hu W, Shukla AW. Deep brain stimulation and other surgical modalities for the management of essential tremor. Expert Rev Med Devices 2020; 17:817-833. [PMID: 33081571 DOI: 10.1080/17434440.2020.1806709] [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] [Indexed: 12/27/2022]
Abstract
INTRODUCTION Surgical treatments are considered for essential tremor (ET) when patients do not respond to oral pharmacological therapies. These treatments mainly comprise radiofrequency (RF) thalamotomy, gamma knife radiosurgery (GKRS), deep brain stimulation (DBS), and focused ultrasound (FUS) procedures. AREAS COVERED We reviewed the strengths and weaknesses of each procedure and clinical outcomes for 7 RF studies (n = 85), 11 GKRS (n = 477), 33 DBS (n = 1061), and 13 FUS studies (n = 368). A formal comparison was not possible given the heterogeneity in studies. Improvements were about 42%-90% RF, 10%-79% GKRS, 45%-83% DBS, 42%-83% FUS at short-term follow-up (<12 months) and were about 54%-82% RF, 11%-84% GKRS, 18%-92% DBS, and 42%-80% FUS at long-term follow-up (>12 months). EXPERT OPINION We found DBS with inherent advantages of being an adjustable and reversible procedure as the most frequently employed surgical procedure for control of ET symptoms. FUS is a promising procedure but has limited applicability for unilateral control of symptoms. RF is invasive, and GKRS has unpredictable delayed effects. Each of these surgical modalities has advantages and limitations that need consideration when selecting a treatment for the ET patients.
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Affiliation(s)
- Kai-Liang Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University , Beijing, China.,Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University , Beijing, China
| | - Qianwei Ren
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University , Beijing, China
| | - Shannon Chiu
- Department of Neurology, University of Florida College of Medicine , Gainesville, FL, USA
| | - Bhavana Patel
- Department of Neurology, University of Florida College of Medicine , Gainesville, FL, USA
| | - Fan-Gang Meng
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University , Beijing, China
| | - Wei Hu
- Department of Neurology, University of Florida College of Medicine , Gainesville, FL, USA
| | - Aparna Wagle Shukla
- Department of Neurology, University of Florida College of Medicine , Gainesville, FL, USA
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Magnetic resonance-guided focused ultrasound for movement disorders: clinical and neuroimaging advances. Curr Opin Neurol 2020; 33:488-497. [DOI: 10.1097/wco.0000000000000840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Pineda-Pardo JA, Urso D, Martínez-Fernández R, Rodríguez-Rojas R, del-Alamo M, Millar Vernetti P, Máñez-Miró JU, Hernández-Fernández F, de Luis-Pastor E, Vela-Desojo L, Obeso JA. Transcranial Magnetic Resonance-Guided Focused Ultrasound Thalamotomy in Essential Tremor: A Comprehensive Lesion Characterization. Neurosurgery 2019; 87:256-265. [DOI: 10.1093/neuros/nyz395] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 07/21/2019] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Transcranial magnetic resonance-guided focused ultrasound (tcMRgFUS) thalamotomy is a novel and effective treatment for controlling tremor in essential tremor patients.
OBJECTIVE
To provide a comprehensive characterization of the radiological, topographical, and volumetric aspects of the tcMRgFUS thalamic lesion, and to quantify how they relate to the clinical outcomes.
METHODS
In this study, clinical and radiological data from forty patients with medically-refractory essential tremor treated with unilateral tcMRgFUS thalamotomy were retrospectively analyzed. Treatment efficacy was assessed with Clinical Rating Scale for Tremor (CRST). Lesions were manually segmented on T1, T2, and susceptibility-weighted images, and 3-dimensional topographical analysis was then carried out. Statistical comparisons were performed using nonparametric statistics.
RESULTS
The greatest clinical improvement was correlated with a more inferior and posterior lesion, a bigger lesion volume, and percentage of the ventral intermediate nucleus covered by the lesion; whereas, the largest lesions accounted for the occurrence of gait imbalance. Furthermore, the volume of the lesion was significantly predicted by the number of sonications surpassing 52°C.
CONCLUSION
Here we provide a comprehensive characterization of the thalamic tcMRgFUS lesion including radiological and topographical analysis. Our results indicate that the location and volume of the lesion were significantly associated with the clinical outcome and that mid-temperatures may be responsible for the lesion size. This could serve ultimately to improve targeting and judgment and to optimize clinical outcome of tcMRgFUS thalamotomy.
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Affiliation(s)
- José Angel Pineda-Pardo
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Network Center for Biomedical Research on Neurodegenerative Diseases, Instituto Carlos III, Madrid, Spain
| | - Daniele Urso
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, United Kingdom
| | - Raul Martínez-Fernández
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Network Center for Biomedical Research on Neurodegenerative Diseases, Instituto Carlos III, Madrid, Spain
| | - Rafael Rodríguez-Rojas
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Network Center for Biomedical Research on Neurodegenerative Diseases, Instituto Carlos III, Madrid, Spain
| | - Marta del-Alamo
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
| | | | - Jorge U Máñez-Miró
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
| | - Frida Hernández-Fernández
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Universidad Europea de Madrid, Faculty of Biomedical and Health Sciences, Department of Nursing
| | | | - Lydia Vela-Desojo
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
| | - José A Obeso
- CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur, CEU-San Pablo University, Móstoles, Madrid, Spain
- Network Center for Biomedical Research on Neurodegenerative Diseases, Instituto Carlos III, Madrid, Spain
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Pineda‐Pardo JA, Martínez‐Fernández R, Rodríguez‐Rojas R, Del‐Alamo M, Hernández F, Foffani G, Dileone M, Máñez‐Miró JU, De Luis‐Pastor E, Vela L, Obeso JA. Microstructural changes of the dentato-rubro-thalamic tract after transcranial MR guided focused ultrasound ablation of the posteroventral VIM in essential tremor. Hum Brain Mapp 2019; 40:2933-2942. [PMID: 30865338 PMCID: PMC6865586 DOI: 10.1002/hbm.24569] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 02/05/2019] [Accepted: 02/28/2019] [Indexed: 12/13/2022] Open
Abstract
Essential tremor is the most common movement disorder in adults. In patients who are not responsive to medical treatment, functional neurosurgery and, more recently, transcranial MR-guided focused ultrasound thalamotomy are considered effective therapeutic approaches. However, the structural brain changes following a thalamotomy that mediates the clinical improvement are still unclear. In here diffusion weighted images were acquired in a cohort of 24 essential tremor patients before and 3 months after unilateral transcranial MR-guided focused ultrasound thalamotomy targeting at the posteroventral part of the VIM. Microstructural changes along the DRTT were quantified by means of probabilistic tractography, and later related to the clinical improvement of the patients at 3-months and at 1-year after the intervention. In addition the changes along two neighboring tracts, that is, the corticospinal tract and the medial lemniscus, were assessed, as well as the relation between these changes and the presence of side effects. Thalamic lesions produced local and distant alterations along the trajectory of the DRTT, and each correlated with clinical improvement. Regarding side effects, gait imbalance after thalamotomy was associated with greater impact on the DRTT, whereas the presence of paresthesias was significantly related to a higher overlap between the lesion and the medial lemniscus. This work represents the largest series describing the microstructural changes following transcranial MR-guided focused ultrasound thalamotomy in essential tremor. These results suggest that clinical benefits are specific for the impact on the cerebello-thalamo-cortical pathway, thus reaffirming the potential of tractography to aid thalamotomy targeting.
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Affiliation(s)
- Jose A. Pineda‐Pardo
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Network Center for Biomedical Research on Neurodegenerative DiseasesInstituto Carlos IIIMadridSpain
| | - Raul Martínez‐Fernández
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Network Center for Biomedical Research on Neurodegenerative DiseasesInstituto Carlos IIIMadridSpain
| | - Rafael Rodríguez‐Rojas
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Network Center for Biomedical Research on Neurodegenerative DiseasesInstituto Carlos IIIMadridSpain
| | - Marta Del‐Alamo
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
| | - Frida Hernández
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
| | - Guglielmo Foffani
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Hospital Nacional de ParapléjicosToledoSpain
| | - Michele Dileone
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
| | - Jorge U. Máñez‐Miró
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
| | | | - Lydia Vela
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Network Center for Biomedical Research on Neurodegenerative DiseasesInstituto Carlos IIIMadridSpain
| | - José A. Obeso
- CINAC (Centro Integral de Neurociencias)University Hospital HM Puerta del Sur, CEU‐San Pablo UniversityMadridSpain
- Network Center for Biomedical Research on Neurodegenerative DiseasesInstituto Carlos IIIMadridSpain
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Niranjan A, Raju SS, Monaco EA, Flickinger JC, Lunsford LD. Is staged bilateral thalamic radiosurgery an option for otherwise surgically ineligible patients with medically refractory bilateral tremor? J Neurosurg 2018; 128:617-626. [DOI: 10.3171/2016.11.jns162044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVEUnilateral Gamma Knife thalamotomy (GKT) is a well-established treatment for patients with medically refractory tremor who are not eligible for invasive procedures due to increased risk of compications. The purpose of this study was to evaluate whether staged bilateral GKT provides benefit with acceptable risk to patients suffering from disabling medically refractory bilateral tremor.METHODSEleven patients underwent staged bilateral GKT during a 17-year period (1999–2016). Eight patients had essential tremor (ET), 2 had Parkinson's disease (PD)–related tremor, and 1 had multiple-sclerosis (MS)–related tremor. For the first GKT, a median maximum dose of 140 Gy was delivered to the posterior-inferior region of the nucleus ventralis intermedius (VIM) through a single isocenter with 4-mm collimators. Patients who benefitted from unilateral GKT were eligible for a contralateral GKT 1–2 years later (median 22 months). For the second GKT, a median maximum dose of 130 Gy was delivered to the opposite VIM nucleus to a single 4-mm isocenter. The Fahn-Tolosa-Marin (FTM) clinical tremor rating scale was used to score tremor, drawing, and drinking before and after each GKT. The FTM writing score was assessed only for the dominant hand before and after the first GKT. The Karnofsky Performance Status (KPS) was used to assess quality of life and activities of daily living before and after the first and second GKT.RESULTSThe median time to last follow-up after the first GKT was 35 months (range 11–70 months). All patients had improvement in at least 1 FTM score after the first GKT. Three patients (27.3%) had tremor arrest and complete restoration of function (noted via FTM tremor, writing, drawing, and drinking scores equaling zero). No patient had tremor recurrence or diminished tremor relief after the first GKT. One patient experienced new temporary neurological deficit (contralateral lower-extremity hemiparesis) from the first GKT. The median time to last follow-up after the second GKT was 12 months (range 2–70 months). Nine patients had improvement in at least 1 FTM score after the second GKT. Two patients had tremor arrest and complete restoration of function. No patient experienced tremor recurrence or diminished tremor relief after the second GKT. No patient experienced new neurological or radiological adverse effect from the second GKT. Statistically significant improvements were noted in the KPS score following the first and second GKT.CONCLUSIONSStaged bilateral GKT provided effective relief for medically refractory, disabling, bilateral tremor without increased risk of neurological complications. It is an appropriate strategy for carefully selected patients with medically refractory bilateral tremor who are not eligible for deep brain stimulation.
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Affiliation(s)
| | - Sudesh S. Raju
- 2University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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11
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Schreglmann SR, Krauss JK, Chang JW, Bhatia KP, Kägi G. Functional lesional neurosurgery for tremor-a protocol for a systematic review and meta-analysis. BMJ Open 2017; 7:e015409. [PMID: 28487460 PMCID: PMC5623440 DOI: 10.1136/bmjopen-2016-015409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION The recent introduction of incision-less lesional neurosurgery using Gamma Knife and MRI-guided focused ultrasound has revived interest in lesional treatment options for tremor disorders. Preliminary literature researches reveal that the consistency of treatment effects after lesional neurosurgery for tremor has not formally been assessed yet. Similarly, the efficacy of different targets for lesional treatment and incidence of persistent side effects of lesional neurosurgical interventions has not been comprehensively assessed. This work therefore aims to describe a suitable process how to review the existing literature on efficacy and persistent side effects of lesional neurosurgical treatment for tremor due to Parkinson's disease, essential tremor, multiple sclerosis and midbrain/rubral tremor. METHODS AND ANALYSIS We will search electronic databases (Medline, Cochrane) and reference lists of included articles for studies reporting lesional interventions for tremor in cohorts homogeneous for tremor aetiology and intervention (technique and target). We will include cohorts with a minimum number of five subjects and follow-up of 2 months. One investigator will perform the initial literature search and two investigators then independently decide which references to include for final efficacy and safety analysis. After settling of disagreement, data will be extracted from articles using a standardised template. We will perform a random-effect meta-analysis calculating standardised mean differences (Hedge's g) for comparison in Forest plots and subgroup analysis after assessment of heterogeneity using I2 statistics. ETHICS AND DISSEMINATION This study will summarise the available evidence on the efficacy of lesional interventions for the most frequent tremor disorders, as well as for the incidence rate of persisting side effects after unilateral lesional treatment. This data will be useful to guide future work on incision-less lesional interventions for tremor. SYSTEMATIC REVIEW REGISTRATION This study has been registered with the PROSPERO database (no. CRD42016048049).
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Affiliation(s)
| | - Joachim K Krauss
- Department of Neurosurgery, Medizinische Hochschule Hannover, Hannover, Germany
| | - Jin Woo Chang
- Department of Neurosurgery, Yonsei University College of Medicine, Seodaemun-gu, Seoul, South Korea
| | - Kailash P Bhatia
- Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, London, UK
| | - Georg Kägi
- Department of Neurology, Kantonsspital St. Gallen, St. Gallen, Switzerland
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12
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Krack P, Martinez-Fernandez R, del Alamo M, Obeso JA. Current applications and limitations of surgical treatments for movement disorders. Mov Disord 2017; 32:36-52. [DOI: 10.1002/mds.26890] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 12/11/2022] Open
Affiliation(s)
- Paul Krack
- Neurology Division, Department of Clinical Neurosciences; University Hospital of Geneva; Geneva Switzerland
| | | | - Marta del Alamo
- CINAC-Hospital Universitario HM Puerta del Sur; CEU-San Pablo University; Madrid Spain
- Neurosurgery Department; Hospital Universitario Ramon y Cajal; Madrid Spain
| | - Jose A. Obeso
- CINAC-Hospital Universitario HM Puerta del Sur; CEU-San Pablo University; Madrid Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Madrid Spain
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13
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Higuchi Y, Matsuda S, Serizawa T. Gamma knife radiosurgery in movement disorders: Indications and limitations. Mov Disord 2016; 32:28-35. [DOI: 10.1002/mds.26625] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/29/2016] [Accepted: 03/02/2016] [Indexed: 11/09/2022] Open
Affiliation(s)
- Yoshinori Higuchi
- Department of Neurological Surgery; Chiba University Graduate School of Medicine; Chiba Japan
| | - Shinji Matsuda
- Department of Neurology and Strokology; Chiba Central Medical Center; Chiba Japan
| | - Toru Serizawa
- Tokyo Gamma Unit Center; Tsukiji Neurological Clinic; Tokyo Japan
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14
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Gallay MN, Moser D, Rossi F, Pourtehrani P, Magara AE, Kowalski M, Arnold A, Jeanmonod D. Incisionless transcranial MR-guided focused ultrasound in essential tremor: cerebellothalamic tractotomy. J Ther Ultrasound 2016; 4:5. [PMID: 26877873 PMCID: PMC4752806 DOI: 10.1186/s40349-016-0049-8] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 02/08/2016] [Indexed: 11/30/2022] Open
Abstract
Background Already in the late 1960s and early 1970s, targeting of the “posterior subthalamic area (PSA)” was explored by different functional neurosurgical groups applying the radiofrequency (RF) technique to treat patients suffering from essential tremor (ET). Recent advances in magnetic resonance (MR)-guided focused ultrasound (MRgFUS) technology offer the possibility to perform thermocoagulation of the cerebellothalamic fiber tract in the PSA without brain penetration, allowing a strong reduction of the procedure-related risks and increased accuracy. We describe here the first results of the MRgFUS cerebellothalamic tractotomy (CTT). Methods Twenty-one consecutive patients suffering from chronic (mean disease duration 29.9 years), therapy-resistant ET were treated with MRgFUS CTT. Three patients received bilateral treatment with a 1-year interval. Primary relief assessment indicators were the Essential Tremor Rating Scale (Fahn, Tolosa, and Marin) (ETRS) taken at follow-up (3 months to 2 years) with accent on the hand function subscores (HF16 for treated hand and HF32 for both hands) and handwriting. The evolution of seven patients with HF32 above 28 points over 32 (group 1) differentiated itself from the others’ (group 2) and was analyzed separately. Global tremor relief estimations were provided by the patients. Lesion reconstruction and measurement of targeting accuracy were done on 2-day post-treatment MR pictures for each CTT lesion. Results The mean ETRS score for all patients was 57.6 ± 13.2 at baseline and 25.8 ± 17.6 at 1 year (n = 10). The HF16 score reduction was 92 % in group 2 at 3 months and stayed stable at 1 year (90 %). Group 1 showed only an improvement of 41 % at 3 months and 40 % at 1 year. Nevertheless, two patients of group 1 treated bilaterally had an HF16 score reduction of 75 and 88 % for the dominant hand at 1 year after the second side. The mean patient estimation of global tremor relief after CTT was 92 % at 2 days and 77 % at 1-year follow-up. Conclusions CTT with MRgFUS was shown to be an effective and safe approach for patients with therapy-refractory essential tremor, combining neurological function sparing with precise targeting and the possibility to treat patients bilaterally.
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Affiliation(s)
- Marc N Gallay
- Sonimodul, Center for Ultrasound Functional Neurosurgery, Leopoldstrasse 1, CH-4500 Solothurn, Switzerland
| | - David Moser
- Sonimodul, Center for Ultrasound Functional Neurosurgery, Leopoldstrasse 1, CH-4500 Solothurn, Switzerland
| | - Franziska Rossi
- Sonimodul, Center for Ultrasound Functional Neurosurgery, Leopoldstrasse 1, CH-4500 Solothurn, Switzerland
| | - Payam Pourtehrani
- Rodiag Diagnostics Centers, Leopoldstrasse 1, CH-4500 Solothurn, Switzerland
| | - Anouk E Magara
- Praxisgemeinschaft für Neurologie, Thunstrasse 95, CH-3006 Bern, Switzerland
| | - Milek Kowalski
- Privatklinik Obach, Leopoldstrasse 5, CH-4500 Solothurn, Switzerland
| | - Alexander Arnold
- Privatklinik Obach, Leopoldstrasse 5, CH-4500 Solothurn, Switzerland
| | - Daniel Jeanmonod
- Sonimodul, Center for Ultrasound Functional Neurosurgery, Leopoldstrasse 1, CH-4500 Solothurn, Switzerland
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15
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Ledermann K, Jeanmonod D, McAleese S, Aufenberg C, Opwis K, Martin-Soelch C. Effects of Cerebellothalamic Tractotomy on Cognitive and Emotional Functioning in Essential Tremor: A Preliminary Study in 5 Essential Tremor Patients. Stereotact Funct Neurosurg 2015; 93:127-132. [PMID: 25721481 DOI: 10.1159/000368438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 09/18/2014] [Indexed: 11/19/2022]
Abstract
Background: Subthalamic stereotactic interventions have recently caught renewed interest as a treatment for essential tremor (ET). However, it is not clear whether these interventions are associated with neurocognitive, mood or personality changes. Objective: To investigate neurocognition, neuropsychiatric functions and personality variables in patients with ET and to explore the neurocognitive and neuropsychiatric effects of cerebellothalamic tractotomy (CTT), a form of subthalamotomy. Methods: In our study, we investigated cognitive functions, frontal functions, mood and personality variables in 5 patients with intractable ET. Patients were tested before and 3 months after surgery using neuropsychological tests, clinical scales for depression, anxiety, anger regulation and a personality test. Results: Before surgery, ET patients showed normal neurocognitive function, a slightly elevated frontal lobe score in the dimensions mental control and memory, without being indicative of a frontal lesion, and no elevated depression or anxiety scores compared to norm values. After surgery, there was no change in neurocognitive function and no increase in depression or anxiety scores. Conclusion: In this exploratory study on 5 ET patients, CTT was not associated with alterations of mood or neurocognitive functions. © 2015 S. Karger AG, Basel.
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Affiliation(s)
- Katharina Ledermann
- Department of Psychiatry and Psychotherapy, University Hospital Zurich, Zurich, Switzerland
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16
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Fraix V, Castrioto A, Moro E, Krack P. Trattamento chirurgico della malattia di Parkinson. Neurologia 2015. [DOI: 10.1016/s1634-7072(14)69825-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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17
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Buijink AWG, Caan MWA, Contarino MF, Schuurman PR, van den Munckhof P, de Bie RMA, Olabarriaga SD, Speelman JD, van Rootselaar AF. Structural changes in cerebellar outflow tracts after thalamotomy in essential tremor. Parkinsonism Relat Disord 2014; 20:554-7. [PMID: 24637119 DOI: 10.1016/j.parkreldis.2014.02.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 01/30/2014] [Accepted: 02/24/2014] [Indexed: 11/24/2022]
Abstract
BACKGROUND This study set out to determine whether structural changes are present outside the thalamus after thalamotomy in patients with essential tremor (ET), specifically in the cerebellorubrothalamic tracts. We hypothesized that diffusion tensor imaging (DTI) would detect these changes. METHODS We collected DTI scans and analyzed differences in Fractional Anisotropy (FA) and Mean Diffusivity (MD) between the left and right superior and middle cerebellar peduncle in ET patients that have undergone unilateral, left, thalamotomy and ET patients that did not undergo thalamotomy (control group). We used classical ROI-based statistics to determine whether changes are present. RESULTS We found decreased FA and increased MD values in the right superior cerebellar peduncle leading to the left, lesioned thalamus, only in the thalamotomy group. CONCLUSIONS Our study suggests long-term structural changes in the cerebellorubrothalamic tract after thalamotomy. This contributes to further understanding of the biological mechanism following surgical lesions in the basal ganglia.
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Affiliation(s)
- Arthur W G Buijink
- Department of Neurology and Clinical Neurophysiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Brain Imaging Center, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Matthan W A Caan
- Brain Imaging Center, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - M Fiorella Contarino
- Department of Neurology and Clinical Neurophysiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Brain Imaging Center, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - P Richard Schuurman
- Department of Neurosurgery, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Pepijn van den Munckhof
- Department of Neurosurgery, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Rob M A de Bie
- Department of Neurology and Clinical Neurophysiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Silvia Delgado Olabarriaga
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Johannes D Speelman
- Department of Neurology and Clinical Neurophysiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Anne-Fleur van Rootselaar
- Department of Neurology and Clinical Neurophysiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Brain Imaging Center, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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18
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Ferreira JJ, Katzenschlager R, Bloem BR, Bonuccelli U, Burn D, Deuschl G, Dietrichs E, Fabbrini G, Friedman A, Kanovsky P, Kostic V, Nieuwboer A, Odin P, Poewe W, Rascol O, Sampaio C, Schüpbach M, Tolosa E, Trenkwalder C, Schapira A, Berardelli A, Oertel WH. Summary of the recommendations of the EFNS/MDS-ES review on therapeutic management of Parkinson's disease. Eur J Neurol 2013; 20:5-15. [PMID: 23279439 DOI: 10.1111/j.1468-1331.2012.03866.x] [Citation(s) in RCA: 220] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 08/06/2012] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To summarize the 2010 EFNS/MDS-ES evidence-based treatment recommendations for the management of Parkinson's disease (PD). This summary includes the treatment recommendations for early and late PD. METHODS For the 2010 publication, a literature search was undertaken for articles published up to September 2009. For this summary, an additional literature search was undertaken up to December 2010. Classification of scientific evidence and the rating of recommendations were made according to the EFNS guidance. In cases where there was insufficient scientific evidence, a consensus statement ('good practice point') is made. RESULTS AND CONCLUSIONS For each clinical indication, a list of therapeutic interventions is provided, including classification of evidence.
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Affiliation(s)
- J J Ferreira
- Laboratory of Clinical Pharmacology and Therapeutics and Instituto de Medicina Molecular, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
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19
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Dovzhenok A, Rubchinsky LL. On the origin of tremor in Parkinson's disease. PLoS One 2012; 7:e41598. [PMID: 22848541 PMCID: PMC3407214 DOI: 10.1371/journal.pone.0041598] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 06/25/2012] [Indexed: 11/19/2022] Open
Abstract
The exact origin of tremor in Parkinson’s disease remains unknown. We explain why the existing data converge on the basal ganglia-thalamo-cortical loop as a tremor generator and consider a conductance-based model of subthalamo-pallidal circuits embedded into a simplified representation of the basal ganglia-thalamo-cortical circuit to investigate the dynamics of this loop. We show how variation of the strength of dopamine-modulated connections in the basal ganglia-thalamo-cortical loop (representing the decreasing dopamine level in Parkinson’s disease) leads to the occurrence of tremor-like burst firing. These tremor-like oscillations are suppressed when the connections are modulated back to represent a higher dopamine level (as it would be the case in dopaminergic therapy), as well as when the basal ganglia-thalamo-cortical loop is broken (as would be the case for ablative anti-parkinsonian surgeries). Thus, the proposed model provides an explanation for the basal ganglia-thalamo-cortical loop mechanism of tremor generation. The strengthening of the loop leads to tremor oscillations, while the weakening or disconnection of the loop suppresses them. The loop origin of parkinsonian tremor also suggests that new tremor-suppression therapies may have anatomical targets in different cortical and subcortical areas as long as they are within the basal ganglia-thalamo-cortical loop.
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Affiliation(s)
- Andrey Dovzhenok
- Department of Mathematical Sciences and Center for Mathematical Biosciences, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Leonid L. Rubchinsky
- Department of Mathematical Sciences and Center for Mathematical Biosciences, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, United States of America
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- * E-mail:
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20
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Hickey P, Stacy M. The surgical management of Parkinson’s disease. Neurodegener Dis Manag 2011. [DOI: 10.2217/nmt.11.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SUMMARY Parkinson’s disease (PD) is one of the most frequently encountered neurodegenerative disorders in terms of worldwide prevalence. Although medications are typically effective at treating motor symptoms in early to moderately advanced stages, the efficacy of these agents often wanes as the disease progresses. With long-term pharmacologic therapy, many PD patients will also experience motor fluctuations, dyskinesias and unpredictable wearing off of the therapeutic benefit. Deep brain stimulation, the preferred surgical treatment for PD, often improves many of these complications. New surgical options are currently under clinical investigation for advanced PD patients including gene and cell-based therapies.
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Affiliation(s)
- Patrick Hickey
- Division of Neurology, Duke University Medical Center, Durham, NC, USA
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21
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Long-term experience with intraoperative microrecording during DBS neurosurgery in STN and GPi. Acta Neurochir (Wien) 2010; 152:2069-77. [PMID: 20949292 PMCID: PMC2991152 DOI: 10.1007/s00701-010-0835-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 09/30/2010] [Indexed: 12/23/2022]
Abstract
Background Intraoperative microelectrode recording (MER) for targeting during deep brain stimulation (DBS) procedures has been evaluated over a period of 4 years, in 57 consecutive patients with Parkinson’s disease, who received DBS in the subthalamic nucleus (STN-DBS), and 28 consecutive patients with either dystonia (23) or Parkinson’s disease (five), in whom the internal segment of the globus pallidus (GPi-DBS) was targeted. Methods The procedure for DBS was a one-stage bilateral stereotactic approach using a combined electrode for both MER and macrostimulation. Up to five micro/macro-electrodes were used in an array with a central, lateral, medial, anterior, and posterior position. Final target location was based on intraoperative test stimulation. Findings For the STN, the central trajectory was chosen for implantation in 50% of the cases and for the globus pallidus internus (GPi) in 57% of the cases. Furthermore, in 64% of the cases, the channel selected for the permanent electrode corresponded with the trajectory having the longest segment of STN MER activity. For the GPi, this was the case in 61%. The mean and standard deviation of the deepest contact point with respect to the magnetic resonance imaging (MRI)-based target for the STN was 2.1 ± 1.5 mm and for the GPi was −0.5 ± 1.2 mm. Conclusions MER facilitates the selection of the final electrode location in STN-DBS and GPi-DBS, and based on the observed MER activity, a pre-selection could be made as to which channel would be the best candidate for macro-test stimulation and at which depth should be stimulated. The choice of the final location is based on intraoperative test stimulation, and it is demonstrated that regularly it is not the central channel that is chosen for implantation. On average, the target as defined by MER activity intensity was in accordance with the MRI-based targets both for the STN and GPi. However, the position of the best MER activity did not necessarily correlate with the locus that produced the most beneficial clinical response on macroelectrode testing intraoperatively.
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22
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Yap L, Kouyialis A, Varma TRK. Stereotactic neurosurgery for disabling tremor in multiple sclerosis: thalamotomy or deep brain stimulation? Br J Neurosurg 2009; 21:349-54. [PMID: 17676453 DOI: 10.1080/02688690701544002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Disabling tremor is common in multiple sclerosis and up to 75% of patients experience tremor at some point during their disease. The treatment of this tremor, however, remains challenging. Pharmacotherapy in general has been disappointing and stereotactic neurosurgery is becoming increasingly popular. However, the results of stereotactic treatments reported are variable and no systematic review has been performed. The aim of this study was to assess the role of thalamotomy and deep brain stimulation in the treatment of tremor in multiple sclerosis, and to compare the differences in efficacy and safety between the two techniques. We identified the relevant published studies and cases by searching the MEDLINE, EMBASS and the references lists of related articles, and performed a systematic review and assessment of the full texts of all articles selected. Initial tremor suppression was seen in 93.8% of patients who had thalamotomy and 96% in those who had deep brain stimulation. A total of 63.5% of patients had persistent tremor suppression at 12 months or more after thalamotomy. Twelve results for deep brain stimulation were not available in the reviewed literature. Functional improvement was seen only in 47.8% of those who underwent thalamotomy as opposed to 85.2% of those who had deep brain stimulation. While three of the four reported deaths were in patients who underwent thalamotomy, three of the four procedure-related haemorrhages followed DBS. Other common adverse effects like hemiparesis, dysarthria, swallowing difficulties, balance disorder, etc., was reported in both procedures. Numerous studies have attempted to assess the efficacy and safety of thalamotomy and DBS in the treatment of MS tremor, but no standardized outcome measures were used. Nonetheless, the data suggest that both thalamotomy and thalamic DBS are comparable procedures for tremor suppression and that adverse effects can occur with both procedures.
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Affiliation(s)
- L Yap
- Department of Neurosurgery, The Walton Centre for Neurology and Neurosurgery, Liverpool, UK
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Abstract
Tremor in childhood is not commonly described in the literature; but it is also likely underappreciated. The etiology of childhood tremor encompasses a wide variety of pathologic processes. Tremor may occur in isolation, or in association with other neurologic findings or systemic disorders. This article aims to provide an overview of tremorogenic mechanisms with respect to neuroanatomy and neurophysiology, particularly as they relate to children. Classification of tremors, diagnostic entities in childhood, and treatment will also be discussed. With improved recognition and characterization of childhood tremors, we may gain a better understanding of the pathophysiology of the disease and determine more age-appropriate treatment strategies.
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Affiliation(s)
- Stephanie Keller
- Department of Pediatrics, Division of Child Neurology, University of Alabama at Birmingham, The Children's Hospital of Alabama, Birmingham, AL 35233, USA.
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24
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Nijhawan SR, Banks SJ, Aziz TZ, Panourias I, Gregory R, Yianni J, Parkin S, Joint C, Scott RB. Changes in cognition and health-related quality of life with unilateral thalamotomy for Parkinsonian tremor. J Clin Neurosci 2009; 16:44-50. [DOI: 10.1016/j.jocn.2008.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Accepted: 03/21/2008] [Indexed: 11/26/2022]
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Abstract
This review focuses on rodent models of tremor, particularly those induced by pharmacological agents. Harmaline is one of the most frequently used tremor-generating drugs and harmaline-induced tremor is regarded as a model of essential tremor. Harmaline acts on inferior olive neurons, causing enhanced neuronal synchrony and rhythmicity in the olivocerebellar system. In addition, it selectively induces cerebellar Purkinje cell death, speculatively because of excessive glutamate release from nerve terminals of the olivocerebellar system onto Purkinje cells. Systemic administration of cholinomimetics can also produce generalized tremor, and muscarinic receptors on striatal neurons are thought to be the best candidate for the tremor-generating mechanism. On the other hand, dopaminergic neurotoxins, which are used in models of parkinsonism, have yet to be used for experimental analysis of tremor, because tremors induced by dopamine depletion in rodents are less remarkable than those induced by harmaline or cholinomimetics. Recently developed gamma-aminobutyric acid (GABA)(A) receptor alpha-1 subunit knockout mice exhibit postural and kinetic tremors, and clearly reproduce the features of essential tremors. Although from a phenomenological point of view, rodent models of tremor cannot entirely mimic human tremor disorders, they have useful advantages in the analysis of pathophysiological mechanisms underlying tremor. Development of convenient and reproducible methods for evaluating rodent tremor is therefore recommended.
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Affiliation(s)
- Hideto Miwa
- Department of Neurology, Wakayama Medical University, 811-1 Kimiidera, Wakayama-city, Wakayama 641-8510, Japan.
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26
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Abstract
Deep brain stimulation (DBS) has gained widespread acceptance for improving motor function and disability in Parkinson's disease (PD). Patients with features suggestive of atypical parkinsonism (AP) usually have a poorer and less sustained response to levodopa and a poorer prognosis overall when compared with patients with PD. However, experience in the use of DBS with this group of patients is limited and evidence is lacking with regards to its efficacy and adverse effects. We review in detail the experience of DBS surgery in patients with several forms of AP including multiple system atrophy. On the basis of the limited available data reviewed here, DBS for patients with AP is not recommended.
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Affiliation(s)
- Ludy C Shih
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
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Horstink M, Tolosa E, Bonuccelli U, Deuschl G, Friedman A, Kanovsky P, Larsen JP, Lees A, Oertel W, Poewe W, Rascol O, Sampaio C. Review of the therapeutic management of Parkinson's disease. Report of a joint task force of the European Federation of Neurological Societies (EFNS) and the Movement Disorder Society-European Section (MDS-ES). Part II: late (complicated) Parkinson's disease. Eur J Neurol 2006; 13:1186-202. [PMID: 17038032 DOI: 10.1111/j.1468-1331.2006.01548.x] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
To provide evidence-based recommendations for the management of late (complicated) Parkinson's disease (PD), based on a review of the literature. Complicated PD refers to patients suffering from the classical motor syndrome of PD along with other motor or non-motor complications, either disease-related (e.g. freezing) or treatment-related (e.g. dyskinesias or hallucinations). MEDLINE, Cochrane Library and INAHTA database literature searches were conducted. National guidelines were requested from all EFNS societies. Non-European guidelines were searched for using MEDLINE. Part II of the guidelines deals with treatment of motor and neuropsychiatric complications and autonomic disturbances. For each topic, a list of therapeutic interventions is provided, including classification of evidence. Following this, recommendations for management are given, alongside ratings of efficacy. Classifications of evidence and ratings of efficacy are made according to EFNS guidance. In cases where there is insufficient scientific evidence, a consensus statement ('good practice point') is made.
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Affiliation(s)
- M Horstink
- Department of Neurology, Radboud University Medical Centre, Nijmegen, The Netherlands.
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28
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Balás I, Llumiguano C, Dóczi TP. Ablative stereotactic surgery improves manual performance time in Parkinson's disease. Parkinsonism Relat Disord 2006; 12:223-7. [PMID: 16549384 DOI: 10.1016/j.parkreldis.2005.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 11/01/2005] [Accepted: 11/22/2005] [Indexed: 11/29/2022]
Abstract
The objective of this study was to determine the influence of stereotactic ablative surgical interventions on the time required for the performance of manual tasks (i.e. performance time) in patients with Parkinson's disease (PD). We studied 28 patients after pallidotomy and pallido-thalamotomy who were evaluated at four time: before the operation, and 2 days, 3 and 6 months postoperatively. The speed of performance of handwriting and drawing were assessed by means of a chronometer using certain parts of an international standard scale (modified by Fahn). The patients were also assessed according to the Unified Parkinson's Disease Rating Scale (UPDRS) part III. The patients were divided into two groups. Those in group A had relief of all main Parkinsonian symptoms after pallidotomy including tremor. The patients in group B had no relief of tremor straight after pallidotomy. For them the pallidotomy was completed with thalamotomy in the same sitting, which had resulted in cessation of tremor. The time of performance of the manual tasks diminished significantly in all cases in both groups (Student's t-test: p<0.0001). No complications developed following pallidotomy. Pallido-thalamotomy caused transient adverse effects in two patients, and one patient developed permanent adverse effects such as dysarthria and dysequilibrium. Significant improvements were observed in the speed of handwriting and drawing in both groups, but pallido-thalamotomy was accompanied with complications.
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Affiliation(s)
- I Balás
- Department of Neurosurgery, University of Pécs, Rét utca 2 sz, H-7623 Pécs, Hungary
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29
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Chou KL, Hurtig HI, Jaggi JL, Baltuch GH. Bilateral subthalamic nucleus deep brain stimulation in a patient with cervical dystonia and essential tremor. Mov Disord 2005; 20:377-80. [PMID: 15580615 DOI: 10.1002/mds.20341] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The role of subthalamic nucleus (STN) deep brain stimulation (DBS) is well established in Parkinson's disease, but experience with STN DBS in other movement disorders is limited. We report on a patient with medically refractory cervical dystonia and essential tremor resulting in dystonic head tremor and action tremor of the hands who obtained complete tremor suppression and near resolution of her cervical dystonia with bilateral STN stimulation. The results in this case demonstrate that STN DBS can dramatically improve dystonia and tremor in nonparkinsonian movement disorders.
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Affiliation(s)
- Kelvin L Chou
- Department of Clinical Neurosciences, Brown University Medical School, Providence, Rhode Island, USA
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30
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Abstract
Two characteristics of the thalamus--its apparently simple relay function and its daunting multinuclear structure--have been customarily viewed as good reasons to study something else. Yet, now that many other brain regions have been explored and neurophysiologists are turning to questions of how larger circuits operate, these two characteristics are starting to seem more attractive. First, the relay nature of thalamic neurons means that recording from them, like tapping into a wire, can reveal the signals carried by specific circuits. Second, the concentration of like relay neurons into nuclei means that inactivating or stimulating them can efficiently test the functions of the circuits. Recent studies implementing these principles have revealed pathways through the thalamus that contribute to generating movements and to monitoring one's own actions (corollary discharge).
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Affiliation(s)
- Marc A Sommer
- Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bethesda, Maryland 20892-4435, USA.
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Behrens TEJ, Johansen-Berg H, Woolrich MW, Smith SM, Wheeler-Kingshott CAM, Boulby PA, Barker GJ, Sillery EL, Sheehan K, Ciccarelli O, Thompson AJ, Brady JM, Matthews PM. Non-invasive mapping of connections between human thalamus and cortex using diffusion imaging. Nat Neurosci 2003; 6:750-7. [PMID: 12808459 DOI: 10.1038/nn1075] [Citation(s) in RCA: 1732] [Impact Index Per Article: 82.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2003] [Accepted: 04/28/2003] [Indexed: 12/16/2022]
Abstract
Evidence concerning anatomical connectivities in the human brain is sparse and based largely on limited post-mortem observations. Diffusion tensor imaging has previously been used to define large white-matter tracts in the living human brain, but this technique has had limited success in tracing pathways into gray matter. Here we identified specific connections between human thalamus and cortex using a novel probabilistic tractography algorithm with diffusion imaging data. Classification of thalamic gray matter based on cortical connectivity patterns revealed distinct subregions whose locations correspond to nuclei described previously in histological studies. The connections that we found between thalamus and cortex were similar to those reported for non-human primates and were reproducible between individuals. Our results provide the first quantitative demonstration of reliable inference of anatomical connectivity between human gray matter structures using diffusion data and the first connectivity-based segmentation of gray matter.
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Affiliation(s)
- T E J Behrens
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
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Samadani U, Umemura A, Jaggi JL, Colcher A, Zager EL, Baltuch GH. Thalamic deep brain stimulation for disabling tremor after excision of a midbrain cavernous angioma. Case report. J Neurosurg 2003; 98:888-90. [PMID: 12691417 DOI: 10.3171/jns.2003.98.4.0888] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Thalamic deep brain stimulation (DBS) has been demonstrated to be effective for the treatment of parkinsonian or essential tremor. To date, however, few data exist to support the application of this method to treat midbrain tremor. A 24-year-old right-handed man underwent radiosurgery and subsequent resection of a recurrently hemorrhaging cavernous angioma located in the left side of the midbrain. The surgery exacerbated severe choreoathetotic resting and action tremors of his right extremities and trunk. The patient underwent placement of a deep brain stimulator into the left ventral intermediate nucleus of the thalamus (Vim). Postoperatively, decreased truncal ataxia and right-sided choreoathetotic tremor were demonstrated, with a 57% increase in dexterity as measured by task testing. The authors demonstrate that DBS can be an effective treatment modality for disabling tremor after resection of a midbrain cavernous angioma.
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Affiliation(s)
- Uzma Samadani
- Department of Neurosurgery and Neurology, Penn Neurological Institute at Pennsylvania Hospital, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19107, USA
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