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Stereotactic and Functional Neurosurgery

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https://www.readbyqxmd.com/read/29017175/body-weight-changes-after-deep-brain-stimulation-for-obsessive-compulsive-disorder-or-depression
#1
Rosalie S N Linssen, Marloes S Oudijn, Mariska Mantione, Pepijn van den Munckhof, Damiaan Denys, P Richard Schuurman
BACKGROUND: In 2010, we published an often-cited case report describing smoking cessation and substantial weight loss after deep brain stimulation (DBS) for obsessive-compulsive disorder (OCD) in an obese patient. To test whether this single observation was also observed in the treated population at large, the weight changes of a larger cohort of patients who underwent DBS for OCD or major depressive disorder (MDD) were studied. RESULTS: Data were available for 46 patients (30 OCD and 16 MDD patients; mean age 46...
October 11, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/29017157/impact-of-the-number-of-metastatic-tumors-treated-by-stereotactic-radiosurgery-on-the-dose-to-normal-brain-implications-for-brain-protection
#2
Charlotte Rivers, Marissa Tranquilli, Shefalika Prasad, Evan Winograd, Robert J Plunkett, Robert A Fenstermaker, Andrew J Fabiano, Matthew B Podgorsak, Dheerendra Prasad
PURPOSE/OBJECTIVES: The purpose of this study was to evaluate the effect of the number of brain lesions for which stereotactic radiosurgery (SRS) was performed on the dose volume relationships in normal brain. MATERIALS AND METHODS: Brain tissue was segmented using the patient's pre-SRS MRI. For each plan, the following data points were recorded: total brain volume, number of lesions treated, volume of brain receiving 8 Gy (V8), V10, V12, and V15. RESULTS: A total of 225 Gamma Knife® treatments were included in this retrospective analysis...
October 11, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28982108/intraoperative-neurophysiological-monitoring-motor-and-somatosensory-evoked-potentials-in-dorsal-root-entry-zone-lesioning-for-brachial-plexus-avulsion-pain
#3
Byung-Chul Son, Jin-Gyu Choi, Sang-Woo Ha, Deog-Ryeong Kim
AIMS: To address the feasibility and importance of intraoperative neurophysiological monitoring (IONM) in dorsal root entry zone (DREZ) lesioning for brachial plexus avulsion pain. METHODS: Muscle motor evoked potential (mMEP) and somatosensory evoked potential (SSEP) were applied during DREZ lesioning for brachial plexus avulsion pain. RESULTS: IONM of mMEPs and SSEPs was feasible for monitoring of the spinal cord during DREZ lesioning. With the exception of 3 unrecordable mMEPs in ipsilateral arms, mMEPs were preserved and referenced to look for changes according to lesioning in 6 upper extremities (66...
October 6, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28982098/the-relationship-of-electrophysiologic-subthalamic-nucleus-length-as-a-predictor-of-outcomes-in-deep-brain-stimulation-for-parkinson-disease
#4
Mahesh B Shenai, Daxa M Patel, Andrew Romeo, J Dylan Whisenhunt, Harrison C Walker, Stephanie Guthrie, Barton L Guthrie
BACKGROUND: Intraoperative measurement of subthalamic nucleus (STN) width through microelectrode recording (MER) is a common proxy for optimal electrode location during deep brain stimulation (DBS) surgery for Parkinson disease. We assessed whether the MER-determined STN width is a predictor of postoperative Unified Parkinson Disease Rating Scale (UPDRS) improvement. METHODS: Records were reviewed for patients who underwent single-sided STN DBS placement for Parkinson disease between 2005 and 2010 at the UAB Medical Center...
October 6, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28910805/infection-and-erosion-rates-in-trials-of-a-cranially-implanted-neurostimulator-do-not-increase-with-subsequent-neurostimulator-placements
#5
Peter B Weber, Ritu Kapur, Ryder P Gwinn, Richard S Zimmerman, Tracy A Courtney, Martha J Morrell
BACKGROUND/AIMS: The RNS® System utilizes a cranially implanted neurostimulator attached to leads placed at the seizure focus to provide brain responsive stimulation for the treatment of medically intractable partial onset epilepsy. Infection and erosion rates related to the cranial implant site were assessed overall and by neurostimulator procedure to determine whether rates increased with additional procedures. METHODS: Infection and erosion rates were calculated as (1) chance per neurostimulator procedure, (2) incidence per patient implant year, and (3) rates for initial and each subsequent neurostimulator implant (generalized estimating equation)...
September 15, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28889128/hemorrhage-detection-and-incidence-during-magnetic-resonance-guided-deep-brain-stimulator-implantations
#6
Alastair J Martin, Philip A Starr, Jill L Ostrem, Paul S Larson
BACKGROUND/AIMS: Intraoperative magnetic resonance imaging (iMRI) is increasingly used to implant deep brain stimulator (DBS) electrodes. The approach has the advantages of a high targeting accuracy, minimization of brain penetrations, and allowance of implantation under general anesthesia. The hemorrhagic complications of iMRI-guided DBS implantation have not been studied in a large series. We report on the incidence and characteristics of hemorrhage during these procedures. METHODS: Hemorrhage incidence was assessed in a series of 231 iMRI procedures (374 electrodes implanted)...
September 9, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28889124/factors-affecting-stereotactic-accuracy-in-image-guided-deep-brain-stimulator-electrode-placement
#7
Andrew L Ko, Aly Ibrahim, Philippe Magown, Rebecca Macallum, Kim J Burchiel
BACKGROUND/AIMS: Intraoperative imaging allows near-real-time assessment of stereotactic accuracy during implantation of deep brain stimulation (DBS) electrodes. Such technology can be used to examine factors impacting stereotactic error. METHODS: Intraoperative CT imaging was reviewed in patients undergoing DBS placement at Oregon Health and Sciences University. Coordinates of the target electrode were compared to the operative plan to characterize the magnitude and direction of stereotactic error with respect to side of implantation, target, and electrode approach angles...
September 9, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28869946/stereotactic-radiosurgery-for-intractable-tremor-dominant-parkinson-disease-a-retrospective-analysis
#8
Sudesh S Raju, Ajay Niranjan, Edward A Monaco Iii, John C Flickinger, L Dade Lunsford
OBJECTIVE: The purpose of this study was to retrospectively analyze the outcomes of stereotactic radiosurgery for patients suffering from medically refractory Parkinson disease (PD) tremor. METHODS: We retrospectively studied the outcomes of 33 patients who were treated with gamma knife thalamotomy (GKT) over a 19-year period. Twelve patients were ≥80 years. A median dose of 140 Gy (range, 130-150 Gy) was delivered to the nucleus ventralis intermedius through a single 4-mm isocenter...
September 2, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28848107/deep-brain-stimulation-for-the-treatment-of-dejerine-roussy-syndrome
#9
Max Ward, Antonios Mammis
BACKGROUND/AIMS: Patients who suffer from Dejerine-Roussy syndrome commonly experience severe poststroke hemibody pain which has historically been attributed to thalamic lesions. Despite pharmacological treatment, a significant proportion of the population is resistant to traditional therapy. Deep brain stimulation is often appropriate for the treatment of resistant populations. In this review we aim to summarize the targets that are used to treat Dejerine-Roussy syndrome and provide insight into their clinical efficacy...
August 25, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28641280/17th-quadrennial-meeting-of-the-world-society-for-stereotactic-and-functional-neurosurgery-berlin-germany-june-26-29-2017-abstracts
#10
(no author information available yet)
No abstract text is available yet for this article.
June 22, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28810261/comparative-evaluation-of-magnetic-resonance-guided-focused-ultrasound-surgery-for-essential-tremor
#11
Minsoo Kim, Na Young Jung, Chang Kyu Park, Won Seok Chang, Hyun Ho Jung, Jin Woo Chang
BACKGROUND: Treatment options for patients with drug-resistant essential tremor (ET) are limited. Magnetic resonance-guided focused ultrasound surgery (MRgFUS) is an emerging technique to treat refractory ET. OBJECTIVES: To present MRgFUS as an alternative to radiofrequency (RF) thalamotomy or deep brain stimulation (DBS) for ET treatment. METHODS: We retrospectively analyzed 59 patients who underwent unilateral surgery for drug-resistant ET...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28810243/evaluating-critical-brain-radiation-doses-in-the-treatment-of-multiple-brain-lesions-with-gamma-knife-radiosurgery
#12
Mustafa Aziz Hatiboglu, Kerime Akdur
BACKGROUND: Treatment of patients with multiple brain metastases has shifted to stereotactic radiosurgery, withholding whole-brain (WB) radiation therapy. However, radiation toxicity to the brain is a concern when treating multiple brain lesions with single-fraction stereotactic radiosurgery. OBJECTIVE: The purpose of this study was to determine the changes in brain radiation doses when treating various numbers of targets and lesion volumes. METHODS: We simulated different treatment plans with different combinations of varying tumor volumes including 0...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28797005/gamma-knife-radiosurgery-for-cavernous-sinus-meningiomas-analysis-of-outcome-in-166-patients
#13
Maziar Azar, Farid Kazemi, Amin Jahanbakhshi, Iran Chanideh, Maryam Jalessi, Elahe Amini, Ghazale Geraily, Mohammad Farhadi
OBJECTIVES: The outcomes of Gamma Knife radiosurgery (GKRS) for cavernous sinus meningioma (CSM) are presented, and factors possibly affecting outcome are investigated. METHODS: The medical records and imaging and procedural reports of 166 patients with CSM were retrospectively reviewed. Demographic data, procedural data, symptomatic improvement, radiological regression, and progression-free survival (PFS) rates were evaluated. RESULTS: There were 124 women and 42 men; including 44 postoperative and 122 primary GKRS cases...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28787721/refining-the-deep-brain-stimulation-target-within-the-limbic-globus-pallidus-internus-for-tourette-syndrome
#14
Ladan Akbarian-Tefaghi, Harith Akram, Johannes Johansson, Ludvic Zrinzo, Zinovia Kefalopoulou, Patricia Limousin, Eileen Joyce, Marwan Hariz, Karin Wårdell, Tom Foltynie
BACKGROUND: Deep brain stimulation (DBS) in patients with severe, refractory Tourette syndrome (TS) has demonstrated promising but variable results thus far. The thalamus and anteromedial globus pallidus internus (amGPi) have been the most commonly stimulated sites within the cortico-striato thalamic circuit, but an optimal target is yet to be elucidated. OBJECTIVES: This study of 15 patients with long-term amGPi DBS for severe TS investigated whether a specific anatomical site within the amGPi correlated with optimal clinical outcome for the measures of tics, obsessive compulsive behaviour (OCB), and mood...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28772275/deep-brain-stimulation-for-tremor-is-there-a-common-structure
#15
Michael Fiechter, Andreas Nowacki, Markus F Oertel, Jens Fichtner, Ines Debove, M Lenard Lachenmayer, Roland Wiest, Claudio L Bassetti, Andreas Raabe, Alain Kaelin-Lang, Michael W Schüpbach, Claudio Pollo
BACKGROUND: Subthalamic nucleus (STN) stimulation has been recognized to control resting tremor in Parkinson disease. Similarly, thalamic stimulation (ventral intermediate nucleus; VIM) has shown tremor control in Parkinson disease, essential, and intention tremors. Recently, stimulation of the posterior subthalamic area (PSA) has been associated with excellent tremor control. Thus, the optimal site of stimulation may be located in the surrounding white matter. AIMS: The objective of this work was to investigate the area of stimulation by determining the contact location correlated with the best tremor control in STN/VIM patients...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28746939/consistency-between-targets-delineated-by-angiography-computed-tomography-and-magnetic-resonance-imaging-in-stereotactic-radiosurgery-for-arteriovenous-malformation
#16
Yu-Jie Huang, Shih-Wei Hsu, Tsair-Fwu Lee, Jih-Tsun Ho, Wu-Fu Chen
BACKGROUND: Target identification is important for radiosurgery for arteriovenous malformations (AVMs). Targets defined by different imaging modalities may be inconsistent in practice. OBJECTIVES: The goal of this study is to review and analyze the consistency between targets defined by different imaging modalities in radiosurgery for AVMs. METHODS: From March 2007 to June 2011, AVM patients for radiosurgery whose targets were delineated by angiography/computed tomography (CT)/magnetic resonance imaging (MRI) were reviewed...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28728152/use-of-the-putamen-as-a-surrogate-anatomical-marker-for-the-internal-segment-of-the-globus-pallidus-in-deep-brain-stimulation-surgery
#17
John A Thompson, Dali Yin, Steven G Ojemann, Aviva Abosch
OBJECTIVE: The success of deep brain stimulation (DBS) of the internal segment of the globus pallidus (GPi) depends on accurately placing the electrode into the GPi motor territory. Direct targeting can be difficult as GPi laminar borders are not always clearly identifiable on MRI. Here, we report a method for using the putamen (PUT) as a surrogate anatomical marker to target the GPi. METHODS: We developed a PUT-based GPi targeting using the FGATIR (fast gray matter acquisition T1-weighted inversion recovery) MRI sequence and compared it with consensus coordinate-based indirect targeting...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28723697/the-history-and-future-of-ablative-neurosurgery-for-major-depressive-disorder
#18
Matthew Volpini, Peter Giacobbe, G Rees Cosgrove, Anthony Levitt, Andres M Lozano, Nir Lipsman
BACKGROUND: There is an urgent need to develop safe and effective treatments for patients with treatment-resistant depression (TRD). Several neurosurgical procedures have been developed to treat the dysfunctional brain circuits implicated in major depression. OBJECTIVES: This review describes the most common ablative procedures used to treat major depressive disorder: anterior cingulotomy, subcaudate tractotomy, limbic leucotomy, and anterior capsulotomy. The efficacy and safety of each are discussed and compared with other current and emerging modalities, including deep brain stimulation (DBS) and MR-guided focused ultrasound (MRgFUS)...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28683438/gamma-knife-radiosurgery-for-petroclival-meningioma-long-term-outcome-and-failure-pattern
#19
Jin Wook Kim, Dong Gyu Kim, Young-Bem Se, Sung Kwon Kim, Hyun-Tai Chung, Sun Ha Paek, Hee-Won Jung
Total removal of petroclival meningioma is difficult, and aggressive extirpation is often associated with significant surgical morbidity and mortality. The aim of this study was to evaluate the long-term outcome and failure pattern of treatment with Gamma Knife radiosurgery (GKRS) in patients with petroclival meningiomas. Eighty-nine consecutive patients with petroclival meningiomas underwent GKRS between 1998 and 2013. Fifty-eight patients received GKRS as a primary treatment and 31 patients underwent GKRS as a secondary treatment after microsurgery...
2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28614824/compact-intraoperative-mri-stereotactic-accuracy-and-future-directions
#20
Daniel Markowitz, Dishen Lin, Sussan Salas, Nina Kohn, Michael Schulder
BACKGROUND: Intraoperative imaging must supply data that can be used for accurate stereotactic navigation. This information should be at least as accurate as that acquired from diagnostic imagers. OBJECTIVES: The aim of this study was to compare the stereotactic accuracy of an updated compact intraoperative MRI (iMRI) device based on a 0.15-T magnet to standard surgical navigation on a 1.5-T diagnostic scan MRI and to navigation with an earlier model of the same system...
2017: Stereotactic and Functional Neurosurgery
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