Long-Term Successful Outcome of Dystonic Head Tremor after Bilateral Deep Brain Stimulation of the Ventral Intermediate and Ventro-Oral Internus Nuclei: A Case Report and Literature Review of Dystonic Head Tremor
We report herein a case of dystonic head tremor in which improvement persisted for 5 years after deep brain stimulation (DBS) of the bilateral thalamic Vim and ventro-oral internus (Voi) nuclei. The patient, a 67-year-old woman, has a horizontal head tremor associated with cervical dystonia that had been resistant to drug treatment over 3 years. Immediately following surgery, dystonia and tremor symptoms had completely improved. Voice volume declined and dysarthria occurred but improved upon adjusting the stimulation conditions. Over 5 years, both head tremor and cervical dystonia have been completely controlled, and no ot...
Source: Stereotactic and Functional Neurosurgery - January 5, 2021 Category: Neurosurgery Source Type: research

Directional Leads for Deep Brain Stimulation: Technical Notes and Experiences
Conclusion: Precise positioning of D-leads is more challenging than that of conventional DBS leads. By adding an external lead marker, control of optimal lead position and orientation is enhanced. In case of supposed increased risk for hemorrhage because of vessels crossing all possible trajectories in the pre-surgical navigated simulation program, primary D-lead implantation instead of the sharper microelectrodes may be a feasible alternative and it may offer more options than ring electrodes especially in these cases. Prospective studies comparing ring-mode stimulation to directional stimulation to examine the difference...
Source: Stereotactic and Functional Neurosurgery - January 5, 2021 Category: Neurosurgery Source Type: research

Long-Term Control after Radiosurgery for a Recurrent Supratentorial Primitive Neuroectodermal Tumor: A Case Report and Review of the Literature
Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 16, 2020 Category: Neurosurgery Source Type: research

Postoperative Lead Movement after Deep Brain Stimulation Surgery and the Change of Stimulation Volume
Conclusion: The left lead tip displayed a tendency to move lateral, anterior, and inferior and the right a tendency to move anterior and inferior. The anchoring technique was associated to displacement. New brain territory was affected due to the displacement despite considering the reduced stimulated volume after 1 month. Postoperative changes in perielectrode space and small lead movements are reasons for delaying programming to 4 weeks following surgery.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 16, 2020 Category: Neurosurgery Source Type: research

Clinical Application of 7T Magnetic Resonance Imaging in Patients with Focal Cortical Dysplasia IIa and Epilepsy
Conclusion: 7T MRI with WMS and GWBE sequences shows application value in the preoperative imaging diagnosis of lesions with FCD-IIa in epilepsy patients.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 11, 2020 Category: Neurosurgery Source Type: research

Technical Principles and Clinical Workflow of Transcranial MR-Guided Focused Ultrasound
Transcranial MR-guided focused ultrasound (MRgFUS) is a rapidly developing technology in neuroscience for manipulating brain structure and function without open surgery. The effectiveness of transcranial MRgFUS for thermoablation is well established, and the technique is actively employed worldwide for movement disorders including essential tremor. A growing number of centers are also investigating the potential of microbubble-mediated focused ultrasound-induced opening of the blood-brain barrier (BBB) for targeted drug delivery to the brain. Here, we provide a technical overview of the principles, clinical workflow, and o...
Source: Stereotactic and Functional Neurosurgery - December 10, 2020 Category: Neurosurgery Source Type: research

The Role of Hippocampal Neurogenesis in ANT-DBS for LiCl-Pilocarpine-Induced Epileptic Rats
Conclusions: ANT-DBS may suppress SRS and increase the postoperative anxiety of epileptic rats by influencing hippocampal neurogenesis.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 10, 2020 Category: Neurosurgery Source Type: research

Contents Vol 98, 2020
Stereotact Funct Neurosurg 2020;98:I –VI (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 7, 2020 Category: Neurosurgery Source Type: research

Acknowledgements to Reviewers
Stereotact Funct Neurosurg 2020;98:432 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 7, 2020 Category: Neurosurgery Source Type: research

ESSFN The Mission
Stereotact Funct Neurosurg 2020;98:434 –434 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 7, 2020 Category: Neurosurgery Source Type: research

WSSFN Society News
Stereotact Funct Neurosurg 2020;98:433 –433 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 7, 2020 Category: Neurosurgery Source Type: research

Pedunculopontine Nucleus Deep Brain Stimulation for Parkinsonian Disorders: A Case Series
Conclusions: PPN-DBS remains an investigational treatment for levodopa-refractory FOG. This series corroborates some previously reported findings: bilateral stimulation may be more effective than unilateral stimulation; the response in PSP patients may depend on the disease subtype; and diurnal cycling of stimulation to overcome habituation merits further investigation.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 4, 2020 Category: Neurosurgery Source Type: research

Unusual Cerebral Aneurysm after Stereotactic Radiosurgery to Treat Trigeminal Neuralgia
Stereotactic radiosurgery is a treatment option for trigeminal neuralgia. This procedure is minimally invasive, but tumor development and facial numbness have been reported. Here, we report an unusual presentation after stereotactic radiosurgery to treat trigeminal neuralgia. A 60-year-old man demonstrated typical signs for type 1 trigeminal nerve neuralgia and was treated with medication for 5 years. Owing to an intolerance to that medication, he received stereotactic radiosurgery with 66 Gy. During a 9-year follow-up exam, dizziness with a spinning sensation was reported and a right superior cerebellar thrombosed aneurys...
Source: Stereotactic and Functional Neurosurgery - December 2, 2020 Category: Neurosurgery Source Type: research

Does the Diffuseness of the Nidus Affect the Outcome of Stereotactic Radiosurgery in Patients with Unruptured Cerebral Arteriovenous Malformations?
Conclusions: The diffuseness of the nidus indeed appears to affect the RIC rate following SRS in patients with unruptured AVMs.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 2, 2020 Category: Neurosurgery Source Type: research

O-Arm Stereotactic Imaging in Deep Brain Stimulation Surgery Workflow: A Utility and Cost-Effectiveness Analysis
Conclusions: The use of the O-arm in DBS surgery workflow significantly reduced the duration of image acquisition, the exposure to ionizing radiation, and costs when compared with standard stereotactic MRI or CT, without reducing accuracy.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - December 1, 2020 Category: Neurosurgery Source Type: research