Stereotactic and Functional Neurosurgery This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Potentials and Limitations of Directional Deep Brain Stimulation: A Simulation Approach
Conclusion: To get full benefit from directional leads, both the shift angle as well as the shift to target volume are required to choose the correct amplitude distribution on the electrodes. Current directional leads have limitations when compensating malpositions #x3e;1 mm; however, they still outperform conventional leads in reducing overstimulation. Further, their main advantage probably lies in the reduction of side effects. Databases like the one from this simulation could serve for optimized lead programming algorithms in the future.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - October 20, 2020 Category: Neurosurgery Source Type: research

Navigated Deep Brain Stimulation Surgery: Evaluating the Combined Use of a Frame-Based Stereotactic System and a Navigation System
In this study, we added live visualization to a frame-based DBS system, using a standard navigation system and investigated its accuracy and potential use in DBS surgery. As a first step, a phantom study was conducted to investigate the accuracy of the navigation system in conjunction with a frame-based approach. As a second step, 5 DBS surgeries were performed with this combined approach. Afterwards, 3 neurosurgeons and 2 neurologists with different levels of experience evaluated the potential use of the system with a questionnaire. Moreover, the additional personnel, costs and required set up time were noted and compared...
Source: Stereotactic and Functional Neurosurgery - October 19, 2020 Category: Neurosurgery Source Type: research

Deep Brain Stimulation Generator Failure due to External Defibrillation in a Patient with Essential Tremor
We report a 64-year-old male with DBS system in place for essential tremor who underwent cardiac defibrillation after cardiac arrest. Afterwards, his device impedances were all high and his tremor symptoms returned. Both problems resolved with implantation of a new generator and required no changes to the intracranial leads or extension cables. This is significantly different from the two previous reports. One included a significantly different DBS system relying on transcutaneous RF transmission and reported a lesioning effect after cardioversion. The other utilized a modern DBS system but reported damage to the generator...
Source: Stereotactic and Functional Neurosurgery - October 16, 2020 Category: Neurosurgery Source Type: research

Temporal Stability of Lead Orientation in Directional Deep Brain Stimulation
Conclusion: The orientation of directional leads was stable and showed no clinically relevant changes either in the first weeks after implantation or over longer periods of time.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - October 13, 2020 Category: Neurosurgery Source Type: research

Time Efficiency in Stereotactic Robot-Assisted Surgery: An Appraisal of the Surgical Procedure and Surgeon ’s Learning Curve
Conclusion: Introducing stereotactic, robot-assisted surgery in an established clinical setting initially necessitates a prolonged intraoperative preparation time. However, there is a steep learning curve during the first cases, reaching the time level of classic frame-based stereotaxy. Thus, a stereotactic robot can be integrated into daily routine within a decent period of time, thereby expanding the neurosurgeons ’ armamentarium, especially for procedures with multiple trajectories.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - October 5, 2020 Category: Neurosurgery Source Type: research

Longitudinal Assessment of Rotation Angles after Implantation of Directional Deep Brain Stimulation Leads
Conclusion: Both methods for measuring rotation angles led to comparable results and can be used interchangeably. Directional stimulation settings can safely be initiated after the first postoperative day, without risking subsequent lead rotation-related anatomical shifts.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 30, 2020 Category: Neurosurgery Source Type: research

Comparing Fiducial-Based and Intraoperative Computed Tomography-Based Registration for Frameless Stereotactic Brain Biopsy
Conclusion: iCT-based registration for frameless stereotactic biopsies increases the accuracy significantly without negative effects on the surgical time or the overall time in the OR. Appropriate scan protocols in iCT registration contribute to a significant reduction of the radiation exposure. The high accuracy of the iCT makes it the more favorable registration strategy when taking biopsies of small tumors or lesions near eloquent brain areas.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 29, 2020 Category: Neurosurgery Source Type: research

Parcellation of the Subthalamic Nucleus in Parkinson ’s Disease: A Retrospective Analysis of Atlas- and Diffusion-Based Methods
Conclusions: The results of this study suggest the possibility that atlas-based clustering, as well as diffusion tractography-based parcellation, can be useful in estimating the stimulation target ( “sweet spot”) for STN-DBS in PD patients. Atlas-based as well as diffusion-based clustering might become a useful tool in DBS trajectory planning.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 23, 2020 Category: Neurosurgery Source Type: research

Preoperative Magnetic Resonance Image Quality in Motion Disorder Patients Scheduled for Deep Brain Stimulation Surgery
Conclusion: GA was associated with better MRI sequences than intravenous sedation or no anesthesia.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 21, 2020 Category: Neurosurgery Source Type: research

ESSFN The Mission
Stereotact Funct Neurosurg 2020;98:362 –362 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 21, 2020 Category: Neurosurgery Source Type: research

WSSFN Society News
Stereotact Funct Neurosurg 2020;98:361 –361 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 21, 2020 Category: Neurosurgery Source Type: research

Microelectrode Recording and Radiofrequency Thalamotomy following Focused Ultrasound Thalamotomy
We report on an ET patient who underwent an MRgFUS thalamotomy but experienced tremor recurrence. We expanded the MRgFUS-induced thalamic cavity using radiofrequency (RF), with good effect on the tremor but transient sensorimotor deficits and permanent ataxia. This is the first report of a patient undergoing RF thalamotomy after an unsuccessful MRgFUS thalamotomy. As we used microelectrode recording to guide the RF thalamotomy, we could also study for the first time the electrophysiological properties of previously sonicated thalamic neurons bordering the MRgFUS-induced cavity. These neurons displayed electrophysiological ...
Source: Stereotactic and Functional Neurosurgery - September 16, 2020 Category: Neurosurgery Source Type: research

Percutaneous Foramen Ovale Puncture: Usefulness of Intraoperative CT Control, in the Eventuality of a Narrow Foramen
Conclusion: Alternative imaging methods, such as computed tomography, should be considered when puncture of the foramen ovale by conventional single-plane fluoroscopy fails, to minimize the risk of potential complications triggered by frustrated puncture attempts.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 16, 2020 Category: Neurosurgery Source Type: research

Gamma Knife Radiosurgery as a Primary Treatment for Nonfunctioning Pituitary Adenoma Invading the Cavernous Sinus
Conclusions: SRS may be an alternative primary treatment option for CS-invading NFPA if there is no urgent and absolute indication for surgery such as optic apparatus compression.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 16, 2020 Category: Neurosurgery Source Type: research

Trigeminal Neuralgia Secondary to Meningiomas and Vestibular Schwannoma Is Improved after Stereotactic Radiosurgery: A Systematic Review and Meta-Analysis
Conclusion: SRS for TNB secondary to benign tumors, such as meningiomas and VS, is associated with favorable clinical course, but less favorable than in idiopathic TN. There was, however, heterogeneity among reports and targeting approaches. Although targeting both the nerve and the tumor seemed to achieve better long-term results, the rate of complications was much higher and the number of patients treated was limited. Future clinical studies should focus on the standard reporting of clinical outcomes and randomization of targeting methods.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - September 9, 2020 Category: Neurosurgery Source Type: research