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Stereotactic and Functional Neurosurgery

Zeiad Y Fayed, Hesham Radwan, Mohamed Aziz, Mohamed Eid, Alia H Mansour, Mohamed Nosseir, Hisham Anwer, Tarek Elserry, Walid A Abdel Ghany
BACKGROUND: The optimum target in surgery for Parkinson's disease (PD) is still controversial, especially in patients with tremor-dominant PD. We aim to compare results in tremor-dominant patients undergoing pallidotomy vs. those undergoing simultaneous posteroventral pallidotomy (PVP) and ventral intermediate nucleus (VIM) thalamotomy. METHODS: Twenty-four patients with tremor-dominant PD were included in this study. Twelve patients received unilateral PVP contralateral to the most affected side...
September 18, 2018: Stereotactic and Functional Neurosurgery
Mahsa Malekmohammadi, Hiro Sparks, Nicholas AuYong, Andrew Hudson, Nader Pouratian
BACKGROUND/AIMS: There are reports that microelectrode recording (MER) can be performed under certain anesthetized conditions for functional confirmation of the optimal deep brain stimulation (DBS) target. However, it is generally accepted that anesthesia affects MER. Due to a potential role of local field potentials (LFPs) in DBS functional mapping, we characterized the effect of propofol on globus pallidus interna (GPi) and externa (GPe) LFPs in Parkinson disease (PD) patients. METHODS: We collected LFPs in 12 awake and anesthetized PD patients undergoing DBS implantation...
September 7, 2018: Stereotactic and Functional Neurosurgery
Chencheng Zhang, Yingying Zhang, Shikun Zhan, Dianyou Li, Haiyan Jin, Damiaan Denys, Bomin Sun
No abstract text is available yet for this article.
September 5, 2018: Stereotactic and Functional Neurosurgery
Maarten Bot, Pepijn van den Munckhof, Ben A Schmand, Rob M A de Bie, P Richard Schuurman
OBJECTIVE: To evaluate the possible influence of electrode trajectories penetrating the caudate nucleus (CN) on cognitive outcomes in deep brain stimulation (DBS) surgery for Parkinson's disease (PD). BACKGROUND: It is currently unclear how mandatory CN avoidance during trajectory planning is. DESIGN/METHODS: Electrode trajectories were determined to be inside, outside, or in border region of the CN. Pre- and postoperative neuropsychological tests of each trajectory group were compared in order to evaluate possible differences in cognitive outcomes 12 months after bilateral STN DBS...
September 3, 2018: Stereotactic and Functional Neurosurgery
Sumito Sato, Mitsuru Dan, Hirofumi Hata, Kazuhiro Miyasaka, Mitsuto Hanihara, Ichiyo Shibahara, Yusuke Inoue, Toshihiro Kumabe
BACKGROUND: One of the most serious complications of stereotactic biopsy is postoperative symptomatic hemorrhage due to injury to the basal perforating arteries such as the lenticulostriate arteries neighboring the basal ganglia lesions. OBJECTIVES: A new target-planning method was proposed to reduce hemorrhagic complications by avoiding injury to the perforating arteries. METHODS: Three-dimensional 3-T time-of-flight (3D 3-T TOF) imaging was applied to delineate the basal perforating arteries such as the lenticulostriate arteries...
August 28, 2018: Stereotactic and Functional Neurosurgery
Paresh Doshi, Nikhil Chamankar
No abstract text is available yet for this article.
August 28, 2018: Stereotactic and Functional Neurosurgery
Nathaniel R Ellens, Kost Elisevich, David E Burdette, Sanjay E Patra
BACKGROUND: Neuromodulatory applications such as vagus nerve stimulation (VNS) and responsive neurostimulation (RNS) are safe and effective strategies for medically intractable epilepsy secondary to complex partial seizures, but researchers have yet to compare their efficacies. OBJECTIVE: The goal of this study is to compare VNS and RNS efficacy at reducing seizure frequency and complication rates in subjects with medically intractable epilepsy secondary to complex partial seizures...
August 27, 2018: Stereotactic and Functional Neurosurgery
Sander Bus, Gian Pal, Bichun Ouyang, Pepijn van den Munckhof, Maarten Bot, Sepehr Sani, Leo Verhagen Metman
BACKGROUND/AIMS: Microelectrode recording (MER)-guided deep brain stimulation (DBS) aims to place the DBS lead in the optimal electrophysiological target. When single-track MER or test stimulation yields suboptimal results, trajectory adjustments are made. The accuracy of these trajectory adjustments is unknown. Intraoperative computed tomography can visualize the microelectrode (ME) and verify ME adjustments. We aimed to determine the accuracy of ME movements in patients undergoing MER-guided DBS...
August 24, 2018: Stereotactic and Functional Neurosurgery
Manjul Tripathi, Tipu Zahed Aziz
No abstract text is available yet for this article.
August 22, 2018: Stereotactic and Functional Neurosurgery
Xiaolei Zhang, Hongwei Zhu, Wei Tao, Yongjie Li, Yongsheng Hu
BACKGROUND: Motor cortex stimulation (MCS) has been used in the treatment of chronic neuropathic pain for more than 25 years. However, the mechanisms and outcome predictors still represent major challenges. OBJECTIVES: To investigate outcome predictors and potential mechanisms of MCS on central post-stroke pain (CPSP). MATERIAL AND METHODS: 16 CPSP patients were analyzed at our center. The pain intensity was assessed using a visual analog scale (VAS) before surgery and at the last follow-up...
August 20, 2018: Stereotactic and Functional Neurosurgery
David Bergeron
No abstract text is available yet for this article.
August 15, 2018: Stereotactic and Functional Neurosurgery
Fernando Seijo-Fernandez, Antonio Saiz, Elena Santamarta, Lydia Nader, Marco Antonio Alvarez-Vega, Beatriz Lozano, Elisa Seijo, Juan A Barcia
BACKGROUND: Deep brain stimulation (DBS) and the proper target for chronic cluster headache (CCH) are still subjects of controversy. OBJECTIVES: We present our long-term results of analysis of the target and its structural connectivity. METHODS: Fifteen patients with drug-resistant CCH underwent DBS in coordinates 4 mm lateral to the III ventricular wall and 2 mm behind and 5 mm below the intercommissural point. The clinical parameters recorded were the number of weekly attacks, pain intensity, and duration of the headache...
July 31, 2018: Stereotactic and Functional Neurosurgery
Zhengdao Deng, Dianyou Li, Shikun Zhan, Chencheng Zhang, Peng Huang, Yuhao Sun, YiXin Pan, Xiaoxiao Zhang, Wei Liu, Bomin Sun
BACKGROUND: Phantom limb pain (PLP) is an intractable and debilitating disease without satisfactory treatment options presently available. Central reorganization, peripheral changes, and psychiatric factors contribute to its development; thus, a neuropsychiatry-orientated combined therapy could be promising. OBJECTIVES: We used a combined strategy with the aims of demonstrating its therapeutic outcomes on PLP. METHODS: The patient initially received spinal cord stimulation (SCS) implantation and then anterior cingulotomy (ACING) 2 years later...
2018: Stereotactic and Functional Neurosurgery
Andrew Faramand, Hideyuki Kano, John C Flickinger, Paul Gardner, L Dade Lunsford
BACKGROUND: Granular cell tumors (GCT) of the pituitary are rare. Surgery is considered the primary management option. However, complete resection is often difficult, and surgery is associated with high rates of postoperative complications. AIMS: To report a unique case of pituitary GCT treated with stereotactic radiosurgery (SRS). CASE DESCRIPTION: We report a case of a 40-year-old female with endocrine dysfunction who underwent stereotactic biopsy and then SRS for the management of a suprasellar granular cell tumor...
2018: Stereotactic and Functional Neurosurgery
Prajakta Ghate, Takaomi Taira, Shiro Horisawa
No abstract text is available yet for this article.
2018: Stereotactic and Functional Neurosurgery
Timothy White, Salvatore Zavarella, Lauren Jarchin, Dominic Nardi, Sarah Schaffer, Michael Schulder
BACKGROUND: Surgery on patients with lesions in the dominant hemisphere for language is best done with awake language mapping. Intraoperative MRI (iMRI) has also been proposed as an ideal method for tumor resection control in patients with primary brain tumors. OBJECTIVES: This study examines the feasibility of low-field iMRI during awake craniotomy and tumor resection. METHODS: 36 patients underwent awake resection with a compact iMRI for guidance...
2018: Stereotactic and Functional Neurosurgery
Stephen Sandwell, Simone Montoya, James E Towner, John D Markman, Michael C Schell, Tarun Bhalla
BACKGROUND: Percutaneous trigeminal rhizotomy or balloon compression for trigeminal neuralgia carries a potential risk for the brainstem, the carotid artery, and the basilar artery. OBJECTIVE: To detail the relation of critical neural and vascular structures to expanded balloons used for percutaneous compression of the trigeminal ganglion. METHOD: A retrospective analysis of preprocedural magnetic resonance imaging (MRI) and procedural X-ray-based imaging for 9 patients detailed balloon proximity to the brainstem, carotid artery, and basilar artery...
2018: Stereotactic and Functional Neurosurgery
Clément Baumgarten, Claire Haegelen, Yulong Zhao, Paul Sauleau, Pierre Jannin
BACKGROUND: Moving from awake surgery under local anesthesia to asleep surgery under general anesthesia will require to precisely predict the outcome of deep brain stimulation. OBJECTIVE: To propose a data-driven prediction of both the therapeutic effect and side effects of the surgery. METHODS: The retrospective intraoperative data from 30 patients operated on in the subthalamic nucleus were used to train an artificial neural network to predict the deep brain stimulation outcome...
2018: Stereotactic and Functional Neurosurgery
Martin L Brady, Raghu Raghavan, Jaime Mata, Mike Wilson, Scott Wilson, Rick M Odland, William C Broaddus
BACKGROUND/AIMS: "Whole-brain" infusions have emerged as a potential need with the promise of disease-modifying therapies for neurodegenerative diseases. In addition, several current clinical trials in brain cancer utilize direct delivery of drugs that are required to fill large volumes. Such requirements may not be well served by conventional single port catheters with their "point source" of delivery. Our aim is to examine infusions into large volumes of heterogeneous tissue, aiming for uniformity of distribution...
2018: Stereotactic and Functional Neurosurgery
Linda Sandström, Fredrik Karlsson, Patric Blomstedt
BACKGROUND/AIMS: Deep brain stimulation (DBS) is less effective on voice tremor than arm tremor, and it is generally assumed that successful voice tremor treatment requires bilateral DBS and possibly more precise thalamic stimulation. However, recent findings suggest that these assumptions should be reconsidered. OBJECTIVES: To evaluate whether unilateral DBS targeting the caudal zona incerta (cZi) may be sufficient to alleviate voice tremor in patients with essential tremor, or whether bilateral stimulation is needed...
2018: Stereotactic and Functional Neurosurgery
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