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https://www.readbyqxmd.com/read/28068428/a-network-model-of-local-field-potential-activity-in-essential-tremor-and-the-impact-of-deep-brain-stimulation
#1
Nada Yousif, Michael Mace, Nicola Pavese, Roman Borisyuk, Dipankar Nandi, Peter Bain
Essential tremor (ET), a movement disorder characterised by an uncontrollable shaking of the affected body part, is often professed to be the most common movement disorder, affecting up to one percent of adults over 40 years of age. The precise cause of ET is unknown, however pathological oscillations of a network of a number of brain regions are implicated in leading to the disorder. Deep brain stimulation (DBS) is a clinical therapy used to alleviate the symptoms of a number of movement disorders. DBS involves the surgical implantation of electrodes into specific nuclei in the brain...
January 9, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28062908/role-of-altered-cerebello-thalamo-cortical-network-in-the-neurobiology-of-essential-tremor
#2
Abhishek Lenka, Ketaki Swapnil Bhalsing, Rajanikant Panda, Ketan Jhunjhunwala, Rajini M Naduthota, Jitender Saini, Rose Dawn Bharath, Ravi Yadav, Pramod Kumar Pal
INTRODUCTION: Essential tremor (ET) is the most common movement disorder among adults. Although ET has been recognized as a mono-symptomatic benign illness, reports of non-motor symptoms and non-tremor motor symptoms have increased its clinical heterogeneity. The neural correlates of ET are not clearly understood. The aim of this study was to understand the neurobiology of ET using resting state fMRI. METHODS: Resting state functional MR images of 30 patients with ET and 30 age- and gender-matched healthy controls were obtained...
January 6, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28044461/equivalence-of-cell-survival-data-for-radiation-dose-and-thermal-dose-in-ablative-treatments-analysis-applied-to-essential-tremor-thalamotomy-by-focused-ultrasound-and-gamma-knife
#3
D Schlesinger, M Lee, G Ter Haar, B Sela, M Eames, J Snell, N Kassell, J Sheehan, J Larner, J-F Aubry
Thermal dose and absorbed radiation dose have historically been difficult to compare because different biological mechanisms are at work. Thermal dose denatures proteins and the radiation dose causes DNA damage in order to achieve ablation. The purpose of this paper is to use the proportion of cell survival as a potential common unit by which to measure the biological effect of each procedure. Survival curves for both thermal and radiation doses have been extracted from previously published data for three different cell types...
January 3, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28040459/cerebellar-purkinje-cells-die-by-apoptosis-in-the-shaker-mutant-rat
#4
Nour S Erekat
Cerebellar Purkinje cells (PCs) die in humans leading to a variety of diseases including ataxia and essential tremor. The etiology underlying PC death is poorly understood. Shaker mutant rat is a unique animal model of progressive PC degeneration that is compartmentalized and of adult-onset. In shaker mutant rats, hereditary degeneration of at risk PCs occurs between 7 and 14 postnatal weeks of age as a natural phenotypic expression of the shaker mutation and at earlier or later ages depending upon experimental conditions in restricted anterior (ADC) and posterior (PDC) vermal degeneration compartments...
December 28, 2016: Brain Research
https://www.readbyqxmd.com/read/28028671/anesthesia-considerations-for-patients-with-an-implanted-deep-brain-stimulator-undergoing-surgery-a-review-and-update
#5
Tze Yeng Yeoh, Pirjo Manninen, Suneil K Kalia, Lashmi Venkatraghavan
PURPOSE: Deep brain stimulation (DBS) can be an effective treatment option for patients with essential tremor and Parkinson's disease. This review provides an overview on the functioning of neurostimulators and recent advances in this technology and presents an updated guide on the anesthetic management of patients with an implanted neurostimulator undergoing surgery or medical intervention. SOURCE: A search was conducted on MEDLINE®, EMBASE™, and Cochrane Database of Systematic Reviews databases to identify studies published in English from 1974 to December 2015...
December 27, 2016: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28027070/innovations-in-functional-neurosurgery-and-anesthetic-implications
#6
Lauren K Dunn, Marcel E Durieux, W Jeffrey Elias, Edward C Nemergut, Bhiken I Naik
Functional neurosurgery has undergone rapid growth over the last few years fueled by advances in imaging technology and novel treatment modalities. These advances have led to new surgical treatments using minimally invasive and precise techniques for conditions such as Parkinson's disease, essential tremor, epilepsy, and psychiatric disorders. Understanding the goals and technological issues of these procedures is imperative for the anesthesiologist to ensure safe management of patients presenting for functional neurosurgical procedures...
December 23, 2016: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28017205/meige-s-syndrome-history-epidemiology-clinical-features-pathogenesis-and-treatment
#7
REVIEW
Sanjay Pandey, Soumya Sharma
'Meige's syndrome' is a type of cranial dystonia characterized by blepharospasm and oromandibular dystonia and can be associated with complex movement of lower facial muscles, mouth, jaw, tongue, pharyngeal and cervical muscles. Frequently, blepharospasm is the earliest clinical manifestation, which spreads over a period of time to involve other cranial and extra-cranial muscles. Common characteristics of this syndrome are well known, but their variety is wide. Different eponyms such as "Breughel syndrome", "Wood syndrome", "Blepharospasm plus", "Segmental cranial dystonia" and "Segmental cranio-cervical dystonia" have been used to describe this entity with numerous anatomical variations...
January 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28007997/stimulating-at-the-right-time-phase-specific-deep-brain-stimulation
#8
Hayriye Cagnan, David Pedrosa, Simon Little, Alek Pogosyan, Binith Cheeran, Tipu Aziz, Alexander Green, James Fitzgerald, Thomas Foltynie, Patricia Limousin, Ludvic Zrinzo, Marwan Hariz, Karl J Friston, Timothy Denison, Peter Brown
SEE MOLL AND ENGEL DOI101093/AWW308 FOR A SCIENTIFIC COMMENTARY ON THIS ARTICLE: Brain regions dynamically engage and disengage with one another to execute everyday actions from movement to decision making. Pathologies such as Parkinson's disease and tremor emerge when brain regions controlling movement cannot readily decouple, compromising motor function. Here, we propose a novel stimulation strategy that selectively regulates neural synchrony through phase-specific stimulation. We demonstrate for the first time the therapeutic potential of such a stimulation strategy for the treatment of patients with pathological tremor...
January 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28007690/deep-brain-stimulation-for-tremor-tractographic-versus-traditional-distinct-study-protocol-of-a-randomized-controlled-feasibility-trial
#9
Bastian Elmar Alexander Sajonz, Florian Amtage, Peter Christoph Reinacher, Carolin Jenkner, Tobias Piroth, Jürgen Kätzler, Horst Urbach, Volker Arnd Coenen
BACKGROUND: Essential tremor is a movement disorder that can result in profound disability affecting the quality of life. Medically refractory essential tremor can be successfully reduced by deep brain stimulation (DBS) traditionally targeting the thalamic ventral intermediate nucleus (Vim). Although this structure can be identified with magnetic resonance (MR) imaging nowadays, Vim-DBS electrodes are still implanted in the awake patient with intraoperative tremor testing to achieve satisfactory tremor control...
December 22, 2016: JMIR Research Protocols
https://www.readbyqxmd.com/read/27994349/approach-to-a-tremor-patient
#10
Soumya Sharma, Sanjay Pandey
Tremors are commonly encountered in clinical practice and are the most common movement disorders seen. It is defined as a rhythmic, involuntary oscillatory movement of a body part around one or more joints. In the majority of the population, tremor tends to be mild. They have varying etiology; hence, classifying them appropriately helps in identifying the underlying cause. Clinically, tremor is classified as occurring at rest or action. They can also be classified based on their frequency, amplitude, and body part involved...
October 2016: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/27984052/beta-adrenergic-receptor-blockers-in-hypertension-alive-and-well
#11
William H Frishman
βeta-Adrenergic receptor blockers (β-blockers) are an appropriate treatment for patients having systemic hypertension (HTN) who have concomitant ischemic heart disease (IHD), heart failure, obstructive cardiomyopathy, aortic dissection or certain cardiac arrhythmias. β-blockers can be used in combination with other antiHTN drugs to achieve maximal blood pressure control. Labetalol can be used in HTN emergencies and urgencies. β-blockers may be useful in HTN patients having a hyperkinetic circulation (palpitations, tachycardia, HTN, and anxiety), migraine headache, and essential tremor...
October 27, 2016: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/27981031/probabilistic-mapping-of-deep-brain-stimulation-effects-in-essential-tremor
#12
Till A Dembek, Michael T Barbe, Mattias Åström, Mauritius Hoevels, Veerle Visser-Vandewalle, Gereon R Fink, Lars Timmermann
OBJECTIVE: To create probabilistic stimulation maps (PSMs) of deep brain stimulation (DBS) effects on tremor suppression and stimulation-induced side-effects in patients with essential tremor (ET). METHOD: Monopolar reviews from 16 ET-patients which consisted of over 600 stimulation settings were used to create PSMs. A spherical model of the volume of neural activation was used to estimate the spatial extent of DBS for each setting. All data was pooled and voxel-wise statistical analysis as well as nonparametric permutation testing was used to confirm the validity of the PSMs...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27959761/a-trial-of-focused-ultrasound-thalamotomy-for-essential-tremor
#13
LETTER
Eng-King Tan, Ling-Ling Chan
No abstract text is available yet for this article.
2016: New England Journal of Medicine
https://www.readbyqxmd.com/read/27959760/a-trial-of-focused-ultrasound-thalamotomy-for-essential-tremor
#14
LETTER
Ron L Alterman
No abstract text is available yet for this article.
2016: New England Journal of Medicine
https://www.readbyqxmd.com/read/27959759/a-trial-of-focused-ultrasound-thalamotomy-for-essential-tremor
#15
LETTER
(no author information available yet)
No abstract text is available yet for this article.
2016: New England Journal of Medicine
https://www.readbyqxmd.com/read/27932961/patient-specific-electric-field-simulations-and-acceleration-measurements-for-objective-analysis-of-intraoperative-stimulation-tests-in-the-thalamus
#16
Simone Hemm, Daniela Pison, Fabiola Alonso, Ashesh Shah, Jérôme Coste, Jean-Jacques Lemaire, Karin Wårdell
Despite an increasing use of deep brain stimulation (DBS) the fundamental mechanisms of action remain largely unknown. Simulation of electric entities has previously been proposed for chronic DBS combined with subjective symptom evaluations, but not for intraoperative stimulation tests. The present paper introduces a method for an objective exploitation of intraoperative stimulation test data to identify the optimal implant position of the chronic DBS lead by relating the electric field (EF) simulations to the patient-specific anatomy and the clinical effects quantified by accelerometry...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27920671/proceedings-of-the-fourth-annual-deep-brain-stimulation-think-tank-a-review-of-emerging-issues-and-technologies
#17
Wissam Deeb, James J Giordano, Peter J Rossi, Alon Y Mogilner, Aysegul Gunduz, Jack W Judy, Bryan T Klassen, Christopher R Butson, Craig Van Horne, Damiaan Deny, Darin D Dougherty, David Rowell, Greg A Gerhardt, Gwenn S Smith, Francisco A Ponce, Harrison C Walker, Helen M Bronte-Stewart, Helen S Mayberg, Howard J Chizeck, Jean-Philippe Langevin, Jens Volkmann, Jill L Ostrem, Jonathan B Shute, Joohi Jimenez-Shahed, Kelly D Foote, Aparna Wagle Shukla, Marvin A Rossi, Michael Oh, Michael Pourfar, Paul B Rosenberg, Peter A Silburn, Coralie de Hemptine, Philip A Starr, Timothy Denison, Umer Akbar, Warren M Grill, Michael S Okun
This paper provides an overview of current progress in the technological advances and the use of deep brain stimulation (DBS) to treat neurological and neuropsychiatric disorders, as presented by participants of the Fourth Annual DBS Think Tank, which was convened in March 2016 in conjunction with the Center for Movement Disorders and Neurorestoration at the University of Florida, Gainesveille FL, USA. The Think Tank discussions first focused on policy and advocacy in DBS research and clinical practice, formation of registries, and issues involving the use of DBS in the treatment of Tourette Syndrome...
2016: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/27909628/deep-brain-stimulation-salvages-a-flourishing-dental-practice-a-dentist-with-essential-tremor-recounts-his-experience
#18
EDITORIAL
Guy Giacopuzzi, Melanie Lising, Casey H Halpern
In recounting his experience with deep brain stimulation (DBS), a practicing dentist challenged with long-standing bilateral essential tremor of the hands shares insights into his diagnosis, treatments, and ultimately successful DBS surgery at Stanford University Medical Center, CA, USA. Now nearly one year after his surgery, his practice continues to flourish and he encourages others in his profession to consider the possibility of DBS as a definitive treatment for tremors of the hand, which may salvage their practice...
October 22, 2016: Curēus
https://www.readbyqxmd.com/read/27905365/-gait-disorders-and-postural-instability-in-patients-with-an-essential-tremor
#19
S V Vasichkin, O S Levin
AIM: To study gait disorders and postural instability in patients with essential tremor (ET). MATERIAL AND METHODS: Forty patients with ET, aged from 29 to 82 years, (mean 64.2±13.0) were examined. Tandem walk, tremor, stability and stabilometry were studied. RESULTS AND CONCLUSION: A half of the patients had gait disorders and postural instability. Though these disorders were mild to moderate, they caused significant subjective discomfort and influenced quality of life...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27893132/essential-tremor
#20
Christopher C Muth
No abstract text is available yet for this article.
November 22, 2016: JAMA: the Journal of the American Medical Association
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