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https://www.readbyqxmd.com/read/29137852/dysarthria-in-pallidal-deep-brain-stimulation-in-dystonia-depends-on-the-posterior-location-of-active-electrode-contacts-a-pilot-study
#1
K A M Pauls, P J Bröckelmann, S Hammesfahr, J Becker, A Hellerbach, V Visser-Vandewalle, T A Dembek, I G Meister, L Timmermann
BACKGROUND: Pallidal Deep Brain Stimulation (GPi-DBS) is an efficient treatment for primary dystonia. We investigated stimulation-induced dysarthria, which is the most frequent side-effect of GPi-DBS. METHODS: Speech was recorded while reading a standard text, and performing rapid syllable repetitions ON and OFF DBS in ten dystonia patients (6 men; 3 cervical, 4 segmental, 3 generalized, unselected for DBS-related speech impairments). Speech and articulation rate, pauses, and syllable repetition rates were extracted via acoustic analysis...
November 7, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29133709/experience-of-pallidal-deep-brain-stimulation-in-dystonia-at-a-tertiary-care-centre-in-india-an-initial-experience
#2
M Manjunath, Ravi Yadav, Srinivas Dwarakanath, Ketan Jhunjhunwala, A Jafar, Pratibha Surathi, Abhishek Lenka, Albert Stezin, S Sampath, Pramod K Pal
INTRODUCTION: Dystonia is one of the most prevalent forms of movement disorders and is characterized by sustained or intermittent muscle contractions causing abnormal, often repetitive, movements, postures, or both. Dystonia causes significant morbidity with an adverse impact on the quality of life. When dystonia is medically refractory, causing severe pain and impairment in activities of daily living, deep brain stimulation (DBS) of the globus pallidus interna (GPi) is a potential option to reduce disability...
November 2017: Neurology India
https://www.readbyqxmd.com/read/29130551/a-localized-pallidal-physiomarker-in-cervical-dystonia
#3
Wolf-Julian Neumann, Andreas Horn, Siobhan Ewert, Julius Huebl, Christof Brücke, Colleen Slentz, Gerd-Helge Schneider, Andrea A Kühn
OBJECTIVE: Deep brain stimulation (DBS) allows for direct recordings of neuronal activity from the human basal ganglia. In Parkinson's disease, a disease-specific physiomarker was identified that is now used to investigate adaptive closed-loop stimulation in first studies. In dystonia such a physiomarker is missing. METHODS: Pallidal oscillations were recorded from 153 contact pairs in 27 patients. We investigated whether power amplitudes in theta and beta bands correlate with dystonic symptom severity across patients...
November 11, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29101846/single-unit-activity-of-the-anterior-globus-pallidus-internus-in-tourette-patients-and-posterior-globus-pallidus-internus-in-dystonic-patients
#4
Andrea Giorni, François Windels, Peter G Stratton, Raymond Cook, Paul Silberstein, Terrence Coyne, Peter A Silburn, Pankaj Sah
OBJECTIVES: Our goal was to provide a detailed analysis of neurons' electrophysiological activity recorded in sub-territories of Globus pallidus internus (GPi) used as Deep Brain Stimulation (DBS) targets for these clinical conditions to potentially assist electrode targeting. METHODS: We used intra-operative microelectrode recording during stereotactic neurosurgery to guide implantation of DBS lead. RESULTS: Units in the medial anterior part of GPi of 7 Tourette's syndrome patients under general anesthesia were firing at mean and median rate of 32...
December 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29089234/deep-brain-stimulation-for-stroke-current-uses-and-future-directions
#5
REVIEW
Gavin J B Elias, Andrew A Namasivayam, Andres M Lozano
BACKGROUND: Survivors of stroke often experience significant disability and impaired quality of life related to ongoing maladaptive responses and persistent neurologic deficits. Novel therapeutic options are urgently needed to augment current approaches. One way to promote recovery and ameliorate symptoms may be to electrically stimulate the surviving brain. Various forms of brain stimulation have been investigated for use in stroke, including deep brain stimulation (DBS). OBJECTIVE/METHODS: We conducted a comprehensive literature review in order to 1) review the use of DBS to treat post-stroke maladaptive responses including pain, dystonia, dyskinesias, and tremor and 2) assess the use and potential utility of DBS for enhancing plasticity and recovery from post-stroke neurologic deficits...
October 12, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28975047/development-of-hyperkinesias-after-long-term-pallidal-stimulation-for-idiopathic-segmental-dystonia
#6
Andreas Wloch, Christian Blahak, Mahmoud Abdallat, Hans E Heissler, Marc E Wolf, Joachim K Krauss
BACKGROUND: Chronic deep brain stimulation (DBS) of the globus pallidus internus (GPi) has become an established treatment for dystonia. While bradykinetic symptoms may occur on chronic stimulation, the appearance of hyperkinetic movements has not been well characterized. CASE REPORT: We report on the development of hyperkinesias after more than 10 years of GPi DBS. DISCUSSION: Hyperkinesias may evolve upon long-term GPi DBS in dystonia. This might be related to a combined effect consisting of a reduced threshold for effective GPi stimulation for dystonia and spread of current to the globus pallidus externus...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28975046/intractable-blepharospasm-treated-with-bilateral-pallidal-deep-brain-stimulation
#7
Nijee S Luthra, Kyle T Mitchell, Monica M Volz, Idit Tamir, Phillip A Starr, Jill L Ostrem
BACKGROUND: Blepharospasm can be present as an isolated dystonia or in conjunction with other forms of cranial dystonia, causing significant disability. CASE REPORT: We report a case of a 69-year-old male with craniocervical dystonia, manifesting primarily as incapacitating blepharospasm refractory to medical treatments. He underwent bilateral globus pallidus (GP) deep brain stimulation (DBS) with complete resolution of his blepharospasm and sustained benefit at 12 months postoperatively...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28972096/pallidal-deep-brain-stimulation-for-dystonia-a-long-term-study
#8
Sara Meoni, Valérie Fraix, Anna Castrioto, Alim Louis Benabid, Eric Seigneuret, Laurent Vercueil, Pierre Pollak, Paul Krack, Eric Chevrier, Stephan Chabardes, Elena Moro
BACKGROUND: Pallidal deep brain stimulation (globus pallidus internus (GPi) DBS) is the best therapeutic option for disabling isolated idiopathic (IID) and inherited (INH) dystonia. Acquired dystonia (AD) may also benefit from GPi DBS. Efficacy and safety in the long-term remained to be established. OBJECTIVE: To retrospectively assess long-term clinical outcomes and safety in dystonic patients who underwent GPi DBS. METHODS: Patients were videotaped and assessed preoperatively and postoperatively (1-year and at last available follow-up) using the Burke-Fahn-Marsden Dystonia Rating Scale (motor score (BFMDRS-M); disability score (BFMDRS-D))...
November 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28966051/deep-brain-stimulation-for-disorders-of-consciousness-systematic-review-of-cases-and-ethics
#9
REVIEW
Jonathan Vanhoecke, Marwan Hariz
BACKGROUND: A treatment for patients suffering from prolonged severely altered consciousness is not available. The success of Deep Brain Stimulation (DBS) in diseases such as Parkinson's, dystonia and essential tremor provided a renewed impetus for its application in Disorders of Consciousness (DoC). OBJECTIVE: To evaluate the rationale for DBS in patients with DoC, through systematic review of literature containing clinical data and ethical considerations. METHODS: Articles from PubMed, Embase, Medline and Web of Science were systematically reviewed...
August 24, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28961350/motor-cortical-plasticity-relates-to-symptom-severity-and-clinical-benefit-from-deep-brain-stimulation-in-cervical-dystonia
#10
Daniel Kroneberg, Philip Plettig, Gerd-Helge Schneider, Andrea A Kühn
OBJECTIVE: To investigate the relationship between motor cortical plasticity, intracortical inhibition, and clinical response to pallidal deep brain stimulation (DBS) in patients with cervical dystonia (CD). MATERIALS AND METHODS: Response to paired associative stimulation (PAS) and short interval intracortical inhibition (SICI) were assessed in patients with CD before and after three months of DBS and correlated with severity of dystonic symptoms as assessed by Toronto-Western-Spasmodic Torticollis Rating Scale (TWSTRS) severity score...
September 29, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28942154/pallidal-low-%C3%AE-low-%C3%AE-phase-amplitude-coupling-inversely-correlates-with-parkinson-disease-symptoms
#11
Christos Tsiokos, Mahsa Malekmohammadi, Nicholas AuYong, Nader Pouratian
OBJECTIVE: Recent discoveries suggest that it is most likely the coupling of β oscillations (13-30Hz) and not merely their power that relates to Parkinson disease (PD) pathophysiology. METHODS: We analyzed power and phase amplitude coupling (PAC) in local field potentials (LFP) recorded from Pallidum after placement of deep brain stimulation (DBS) leads in nineteen PD patients and three patients with dystonia. RESULTS: Within GPi, we identified PAC between phase of β and amplitude of high frequency oscillations (200-300Hz) and distinct β-low γ (40-80Hz) PAC both modulated by contralateral movement...
November 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28937508/status-dystonicus-in-childhood
#12
Daniel E Lumsden, Mary D King, Nicholas M Allen
PURPOSE OF REVIEW: Dystonia is a common paediatric neurological condition. At its most severe, dystonia may lead to life-threatening complications, a state termed status dystonicus. This review provides an update on the definition, causes, management and outcome of childhood status dystonicus. RECENT FINDINGS: High-quality studies in childhood status dystonicus are lacking, though an increasing number of case series have been published. Status dystonicus appears to occur more frequently in children compared with adults, with a clear precipitant identified in around two-thirds of cases...
December 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28930542/deep-brain-stimulation-foundations-and-future-trends
#13
David J Aum, Travis S Tierney
Deep brain stimulation (DBS) has emerged as a revolutionary treatment option for essential tremor (ET), Parkinson's disease (PD), idiopathic dystonia, and severe obsessive-compulsive disorder (OCD). This article reviews the historical foundations of DBS including basal ganglia pathophysiological models, classic principles of electrical stimulation, technical components of the DBS system, treatment risks, and future directions for DBS. Chronic high frequency stimulation induces a number of functional changes from fast physiological to slower metabolic effects and ultimately leads to structural reorganization of the brain, so-called neuroplasticity...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28906342/deep-brain-stimulation-for-monogenic-dystonia
#14
Bhooma R Aravamuthan, Jeff L Waugh, Scellig S Stone
PURPOSE OF REVIEW: Deep brain stimulation (DBS) has recently emerged as an important management option in children with medically refractory dystonia. DBS is most commonly used, best studied, and thought to be most efficacious for a select group of childhood or adolescent onset monogenic dystonias (designated with a standard 'DYT' prefix). We review how to clinically recognize these types of dystonia and the relative efficacy of DBS for key monogenic dystonias. RECENT FINDINGS: Though used for dystonia in adults for several years, DBS has only lately been used in children...
December 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28904473/surgical-interventions-for-task-specific-dystonia-writer-s-dystonia
#15
Paresh K Doshi, Raghvendra Vijay Ramdasi, Bharati Karkera, Dilraj B Kadlas
OBJECTIVES: Writer's cramp is a focal dystonia producing abnormal postures during selective motor activities. Thalamotomy or globus pallidus internus deep brain stimulation (GPi DBS) has been used as a surgical treatment in patients not responding to medical treatment. MATERIALS AND METHODS: Eight patients (all men, age 16-47 years) with refractory focal hand dystonia underwent either ventrooralis (Vo) thalamotomy (seven patients) or GPi DBS (one patient) using stereotactic techniques...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28902876/postoperative-lead-migration-in-deep-brain-stimulation-surgery-incidence-risk-factors-and-clinical-impact
#16
Takashi Morishita, Justin D Hilliard, Michael S Okun, Dan Neal, Kelsey A Nestor, David Peace, Alden A Hozouri, Mark R Davidson, Francis J Bova, Justin M Sporrer, Genko Oyama, Kelly D Foote
INTRODUCTION: Deep brain stimulation (DBS) is an effective treatment for multiple movement disorders and shows substantial promise for the treatment of some neuropsychiatric and other disorders of brain neurocircuitry. Optimal neuroanatomical lead position is a critical determinant of clinical outcomes in DBS surgery. Lead migration, defined as an unintended post-operative displacement of the DBS lead, has been previously reported. Despite several reports, however, there have been no systematic investigations of this issue...
2017: PloS One
https://www.readbyqxmd.com/read/28894408/deep-brain-stimulation-dbs-for-movement-disorders-an-experience-in-hospital-universiti-sains-malaysia-husm-involving-12-patients
#17
Lim Liang Hooi, Diana Noma Fitzrol, Senthil Kumar Rajapathy, Tan Yew Chin, Sanihah Abdul Halim, Regunath Kandasamy, Wan Mohd Nazaruddin Wan Hassan, Badrisyah Idris, Abdul Rahman Izaini Ghani, Zamzuri Idris, John Tharakan, Sarun Nunta-Aree, Jafri Malin Abdullah
Deep brain stimulation (DBS) was first introduced in 1987 to the developed world. As a developing country Malaysia begun its movement disorder program by doing ablation therapy using the Radionics system. Hospital Universiti Sains Malaysia a rural based teaching hospital had to take into consideration both health economics and outcomes in the area that it was providing neurosurgical care for when it initiated its Deep Brain Stimulation program. Most of the patients were from the low to medium social economic groups and could not afford payment for a DBS implant...
March 2017: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28800173/non-invasive-brain-stimulation-might-act-in-synergy-with-invasive-brain-stimulation-in-dystonia
#18
EDITORIAL
M Beudel
No abstract text is available yet for this article.
November 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28772097/what-have-we-learned-about-movement-disorders-from-functional-neurosurgery
#19
Andres M Lozano, William D Hutchison, Suneil K Kalia
Modern functional neurosurgery for movement disorders such as Parkinson's disease, tremor, and dystonia involves the placement of focal lesions or the application of deep brain stimulation (DBS) within circuits that modulate motor function. Precise targeting of these motor structures can be further refined by the use of electrophysiological approaches. In particular, microelectrode recordings enable the delineation of neuroanatomic structures. In the course of these operations, there is an opportunity not only to map basal ganglia structures but also to gain insights into how disturbances in neural activity produce movement disorders...
July 25, 2017: Annual Review of Neuroscience
https://www.readbyqxmd.com/read/28768840/thalamic-deep-brain-stimulation-for-tremor-in-parkinson-disease-essential-tremor-and-dystonia
#20
Rubens Gisbert Cury, Valerie Fraix, Anna Castrioto, Maricely Ambar Pérez Fernández, Paul Krack, Stephan Chabardes, Eric Seigneuret, Eduardo Joaquim Lopes Alho, Alim-Louis Benabid, Elena Moro
OBJECTIVE: To report on the long-term outcomes of deep brain stimulation (DBS) of the thalamic ventral intermediate nucleus (VIM) in Parkinson disease (PD), essential tremor (ET), and dystonic tremor. METHODS: One hundred fifty-nine patients with PD, ET, and dystonia underwent VIM DBS due to refractory tremor at the Grenoble University Hospital. The primary outcome was a change in the tremor scores at 1 year after surgery and at the latest follow-up (21 years). Secondary outcomes included the relationship between tremor score reduction over time and the active contact position...
September 26, 2017: Neurology
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