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https://www.readbyqxmd.com/read/29917085/application-of-the-six-sigma-concept-for-quality-assessment-of-different-strategies-in-dbs-surgery
#1
Witold H Polanski, K Daniel Martin, Swen Günther, Gabriele Schackert, Lisa Klingelhoefer, Mareike Fauser, Alexander Storch, Stephan B Sobottka
Background: For quality analysis, we applied the Six Sigma concept to define quality indicators and their boundaries as well as to compare treatment-dependent outcome data of deep brain stimulation (DBS) of the subthalamic nucleus (STN) in patients with Parkinson's disease (PD). Methods: The Unified Parkinson Disease Rating Scale (UPDRS) III with on medication and on stimulation, the reduction of daily levodopa equivalence doses (LED), and the stimulation amplitude 1 year after surgery were registered...
June 18, 2018: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/29915200/subthalamic-theta-activity-a-novel-human-subcortical-biomarker-for-obsessive-compulsive-disorder
#2
Pnina Rappel, Odeya Marmor, Atira S Bick, David Arkadir, Eduard Linetsky, Anna Castrioto, Idit Tamir, Sara A Freedman, Tomer Mevorach, Moran Gilad, Hagai Bergman, Zvi Israel, Renana Eitan
Obsessive-compulsive disorder (OCD) is a common and serious psychiatric disorder. Although subthalamic nucleus deep brain stimulation (DBS) has been studied as a treatment for OCD patients the underlying mechanism of this treatment and the optimal method of stimulation are unknown. To study the neural basis of subthalamic nucleus DBS in OCD patients we used a novel, implantable DBS system with long-term local field potential sensing capability. We focus our analysis on two patients with OCD who experienced severe treatment-resistant symptoms and were implanted with subthalamic nucleus DBS systems...
June 18, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29913198/neuronal-firing-rate-and-oscillatory-patterns-in-the-basal-ganglia-nuclei-differ-from-those-of-the-ventrolateral-thalamus-in-patients-with-parkinson-disease
#3
Gang Du, Ping Zhuang, Yuqing Zhang, Jianyu Li, Yongjie Li
We compared the firing rates and proportion of patterns of oscillatory neurons in the subthalamic nucleus (STN), globus pallidus internus (GPi), and ventrolateral thalamus (VL) in Parkinson disease (PD). Twenty-nine patients with PD who underwent stereotactic neurosurgery were included in the study. Microelectrode recordings in the STN (n = 16), GPi (n = 9), and VL (n = 9) were performed. Power spectral analysis was used to explore neuronal oscillation. Of 76 STN neurons, 39.5% were tremor frequency oscillatory neurons (4-6 Hz, TFB) and 28...
June 15, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29912363/cross-task-contributions-of-frontobasal-ganglia-circuitry-in-response-inhibition-and-conflict-induced-slowing
#4
Sara Jahfari, K Richard Ridderinkhof, Anne G E Collins, Tomas Knapen, Lourens J Waldorp, Michael J Frank
Why are we so slow in choosing the lesser of 2 evils? We considered whether such slowing relates to uncertainty about the value of these options, which arises from the tendency to avoid them during learning, and whether such slowing relates to frontosubthalamic inhibitory control mechanisms. In total, 49 participants performed a reinforcement-learning task and a stop-signal task while fMRI was recorded. A reinforcement-learning model was used to quantify learning strategies. Individual differences in lose-lose slowing related to information uncertainty due to sampling, and independently, to less efficient response inhibition in the stop-signal task...
April 18, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29912203/an-invasive-method-for-the-activation-of-the-mouse-dentate-gyrus-by-high-frequency-stimulation
#5
Zhe Zhao, Haitao Wu
Electrical high-frequency stimulation (HFS), using implanted electrodes targeting various brain regions, has been proven as an effective treatment for various neurological and psychiatric disorders. HFS in the deep region of the brain, also named deep-brain stimulation (DBS), is becoming increasingly important in clinical trials. Recent progress in the field of high-frequency DBS (HF-DBS) surgery has begun to spread the possibility of utilizing this invasive technique to other situations, such as treatment for major depression disorder (MDD), obsessive-compulsive disorder (OCD), and so on...
June 2, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29909467/subthalamic-deep-brain-stimulation-and-levodopa-in-parkinson-s-disease-a-meta-analysis-of-combined-effects
#6
REVIEW
Joaquin A Vizcarra, Miguel Situ-Kcomt, Carlo Alberto Artusi, Andrew P Duker, Leonardo Lopiano, Michael S Okun, Alberto J Espay, Aristide Merola
INTRODUCTION: While subthalamic nucleus deep brain stimulation (STN-DBS) and levodopa improve motor symptoms in Parkinson disease (PD) to a similar magnitude, their combined effect remains unclear. We sought to evaluate whether STN-DBS and levodopa yield differential effects on motor outcomes, dyskinesia, and activities of daily living (ADL) when combined compared to when administered alone. METHODS: We conducted a meta-analysis of all studies reporting motor, dyskinesia, and ADL outcomes after bilateral STN-DBS in PD with presurgical Unified Parkinson's Disease Rating Scale (UPDRS-III) in Medication-OFF and Medication-ON states and postsurgical assessments in four conditions: Stimulation-ON/Medication-ON, Stimulation-ON/Medication-OFF, Stimulation-OFF/Medication-ON, and Stimulation-OFF/Medication-OFF...
June 16, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29909050/beta-burst-coupling-across-the-motor-circuit-in-parkinson-s-disease
#7
Gerd Tinkhauser, Flavie Torrecillos, Yann Duclos, Huiling Tan, Alek Pogosyan, Petra Fischer, Romain Carron, Marie-Laure Welter, Carine Karachi, Wim Vandenberghe, Bart Nuttin, Tatiana Witjas, Jean Régis, Jean-Philippe Azulay, Alexandre Eusebio, Peter Brown
Exaggerated activity in the beta band (13-35 Hz) is a hallmark of basal ganglia signals in patients with Parkinson's disease (PD). Beta activity however is not constantly elevated, but comes in bursts. In previous work we showed that the longer beta bursts are maintained, the more the oscillatory synchronisation within the subthalamic nucleus (STN) increases, which is posited to limit the information coding capacity of local circuits. Accordingly, a higher incidence of longer bursts correlates positively with clinical impairment, while the opposite is true for short, more physiological bursts...
June 14, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29898284/a-within-subject-consideration-of-the-psychotic-spectrum-disorder-concept-in-a-patient-in-remission-associated-with-cortical-gray-matter-recovery
#8
Herbert Y Meltzer, Min Young Sim, Adam Anderson, Christopher Cannistraci, Karu Jayathilake, Daniel Barrett Share, Myung Lee
INTRODUCTION: Psychotic spectrum disorder (PSD) links the syndromes of bipolar disorder, psychotic depression, and schizophrenia, often viewed as unique disorders. AIMS: Application of the PSD concept to a single patient rather than across groups of patients and demonstration of a remarkable remission of schizophrenia phenotype with recovery of gray matter in specific brain regions. RESULTS: We report a woman who experienced discrete, nonoverlapping periods of each of the above syndromes, in the order noted, over a 30-year period, followed by abrupt ending of psychosis and full remission lasting at least 7 years...
July 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29891970/d5-dopamine-receptors-control-glutamatergic-ampa-transmission-between-the-motor-cortex-and-subthalamic-nucleus
#9
Lionel Froux, Morgane Le Bon-Jego, Cristina Miguelez, Elisabeth Normand, Stephanie Morin, Stéphanie Fioramonti, Massimo Barresi, Andreas Frick, Jerome Baufreton, Anne Taupignon
Corticofugal fibers target the subthalamic nucleus (STN), a component nucleus of the basal ganglia, in addition to the striatum, their main input. The cortico-subthalamic, or hyperdirect, pathway, is thought to supplement the cortico-striatal pathways in order to interrupt/change planned actions. To explore the previously unknown properties of the neurons that project to the STN, retrograde and anterograde tools were used to specifically identify them in the motor cortex and selectively stimulate their synapses in the STN...
June 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29890276/both-dbs-and-thalamotomy-in-a-13-year-old-patient-with-primary-dystonia-a-case-report
#10
Hai Lin, Xiao-Dong Cai, Dou-Dou Zhang, Jia-Li Liu, Wei-Ping Li
BACKGROUND: Primary dystonia is a neurological disease with the characteristics of abnormal, involuntary twisting and turning movements, which greatly affects life quality of patients. Treatments for dystonia consist of oral medications, botulinum neurotoxin injections, physical therapy and surgeries. For medication-refractory dystonia, surgeries, especially deep brain stimulation (DBS), are the optimal option. CASE DESCRIPTION: the patient was a 13-year-old boy suffering from extremely severe primary dystonia, with a BFMDRS-M score of 118 and a TWSTRS-S score of 29...
June 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29887826/anatomical-correlates-of-uncontrollable-laughter-with-unilateral-subthalamic-deep-brain-stimulation-in-parkinson-s-disease
#11
Yonglu Huang, Joshua P Aronson, Julie G Pilitsis, Lucy Gee, Jennifer Durphy, Eric Steven Molho, Adolfo Ramirez-Zamora
Introduction: Subthalamic nucleus deep brain stimulation (STN-DBS) is a well-established treatment for the management of motor complications in Parkinson's disease. Uncontrollable laughter has been reported as a rare side effect of STN stimulation. The precise mechanism responsible for this unique phenomenon remains unclear. We examined in detail the DBS electrode position and stimulation parameters in two patients with uncontrollable laughter during programming after STN-DBS surgery and illustrated the anatomical correlates of the acute mood changes with STN stimulation...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29887129/the-impact-of-subthalamic-deep-brain-stimulation-on-polysomnographic-sleep-pattern-in-patients-with-parkinson-s-disease-preliminary-report
#12
Jarosław Dulski, Michał Schinwelski, Agnieszka Konkel, Karol Grabowski, Witold Libionka, Piotr Wąż, Sitek E J, Jarosław Sławek
AIM OF THE STUDY: We present the preliminary results of the study focused on the impact of subthalamic deep brain stimulation (DBS-STN) on sleep and other non-motor symptoms (NMS). MATERIALS AND METHODS: Ten patients with advanced PD, underwent two-night polysomnography (PSG) mean 1.1 week before surgery and 6.2 months post DBS programming. NMS were assessed with a set of scales before surgery and 6 months and 12 months following DBS programming. RESULTS: Contrary to previous studies, we noted deterioration of sleep pattern in the follow-up PSG...
June 1, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29886807/model-and-analysis-for-the-onset-of-parkinsonian-firing-patterns-in-a-simplified-basal-ganglia
#13
Michael Caiola, Mark H Holmes
Parkinson's disease (PD) is a degenerative neurological disease that disrupts the movement cycle in the basal ganglia. As the disease progresses, dopamine depletion leads to changes to how the basal ganglia functions as well as the appearance of abnormal beta oscillations. There is much debate on just exactly how these connection strengths change and just how the oscillations emerge. One leading hypothesis claims that the oscillations develop in the globus pallidus external, subthalamic nucleus, and globus pallidus internal loop...
May 3, 2018: International Journal of Neural Systems
https://www.readbyqxmd.com/read/29880881/subthalamic-nucleus-high-frequency-stimulation-prevents-and-reverses-escalated-cocaine-use
#14
Yann Pelloux, Mickaël Degoulet, Alix Tiran-Cappello, Candie Cohen, Sylvie Lardeux, Olivier George, George F Koob, Serge H Ahmed, Christelle Baunez
One of the key features of addiction is the escalated drug intake. The neural mechanisms involved in the transition to addiction remain to be elucidated. Since abnormal neuronal activity within the subthalamic nucleus (STN) stands as potential general neuromarker common to impulse control spectrum deficits, as observed in obsessive-compulsive disorders, the present study recorded and manipulated STN neuronal activity during the initial transition to addiction (i.e., escalation) and post-abstinence relapse (i...
June 7, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29880315/subthalamic-deep-brain-stimulation-in-patients-with-primary-dystonia-a-ten-year-follow-up-study
#15
Zhengdao Deng, Yixin Pan, Chencheng Zhang, Jing Zhang, Xian Qiu, Shikun Zhan, Dianyou Li, Bomin Sun
BACKGROUND: Subthalamic deep brain stimulation (STN-DBS) is a promising intervention for primary dystonia; however, evidence regarding its efficacy is lacking. Thus, a long-term follow-up is indispensable. OBJECTIVE: This trial was designed to examine the efficacy and consistency of subthalamic deep brain stimulation in patients with primary dystonia over the long term. METHOD: This was a retrospective study involving 14 patients with primary dystonia who underwent STN-DBS and consented to a follow-up of at least 10 years...
May 31, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29876284/the-site-of-stimulation-moderates-neuropsychiatric-symptoms-after-subthalamic-deep-brain-stimulation-for-parkinson-s-disease
#16
Philip E Mosley, David Smith, Terry Coyne, Peter Silburn, Michael Breakspear, Alistair Perry
Deep brain stimulation of the subthalamic nucleus for Parkinson's disease is an established advanced therapy that addresses motor symptoms and improves quality of life. However, it has also been associated with neuropsychiatric symptoms such as impulsivity and hypomania. When significant, these symptoms can be distressing, necessitating psychiatric intervention. However, a comprehensive analysis of neurocognitive and neuropsychiatric outcomes with reference to the site of subthalamic stimulation has not been undertaken...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29874298/phase-matters-a-role-for-the-subthalamic-network-during-gait
#17
Gabriele Arnulfo, Nicolò Gabriele Pozzi, Chiara Palmisano, Alice Leporini, Andrea Canessa, Joachim Brumberg, Gianni Pezzoli, Cordula Matthies, Jens Volkmann, Ioannis Ugo Isaias
The role of the subthalamic nucleus in human locomotion is unclear although relevant, given the troublesome management of gait disturbances with subthalamic deep brain stimulation in patients with Parkinson's disease. We investigated the subthalamic activity and inter-hemispheric connectivity during walking in eight freely-moving subjects with Parkinson's disease and bilateral deep brain stimulation. In particular, we compared the subthalamic power spectral densities and coherence, amplitude cross-correlation and phase locking value between resting state, upright standing, and steady forward walking...
2018: PloS One
https://www.readbyqxmd.com/read/29872162/reinforcement-magnitudes-modulate-subthalamic-beta-band-activity-in-patients-with-parkinson-s-disease
#18
Henning Schroll, Andreas Horn, Joachim Runge, Axel Lipp, Gerd-Helge Schneider, Joachim K Krauss, Fred H Hamker, Andrea A Kühn
We set out to investigate whether beta oscillations in the human basal ganglia are modulated during reinforcement learning. Based on previous research, we assumed that beta activity might either reflect the magnitudes of individuals' received reinforcements (reinforcement hypothesis), their reinforcement prediction errors (dopamine hypothesis) or their tendencies to repeat versus adapt responses based upon reinforcements (status-quo hypothesis). We tested these hypotheses by recording local field potentials (LFPs) from the subthalamic nuclei of 19 Parkinson's disease patients engaged in a reinforcement-learning paradigm...
June 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29867716/vergence-and-strabismus-in-neurodegenerative-disorders
#19
REVIEW
Sarah L Kang, Aasef G Shaikh, Fatema F Ghasia
Maintaining proper eye alignment is necessary to generate a cohesive visual image. This involves the coordination of complex neural networks, which can become impaired by various neurodegenerative diseases. When the vergence system is affected, this can result in strabismus and disorienting diplopia. While previous studies have detailed the effect of these disorders on other eye movements, such as saccades, relatively little is known about strabismus. Here, we focus on the prevalence, clinical characteristics, and treatment of strabismus and disorders of vergence in Parkinson's disease, spinocerebellar ataxia, Huntington disease, and multiple system atrophy...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29859320/correlation-between-cortical-beta-power-and-gait-speed-is-suppressed-in-a-parkinsonian-model-but-restored-by-therapeutic-deep-brain-stimulation
#20
Christian A Polar, Rahul Gupta, Mark J Lehmkuhle, Alan D Dorval
The motor cortex and subthalamic nucleus (STN) of patients with Parkinson's disease (PD) exhibit abnormally high levels of electrophysiological oscillations in the ~12-35 Hz beta-frequency range. Recent studies have shown that beta is partly carried forward to regulate future motor states in the healthy condition, suggesting that steady state beta power is lower when a sequence of movements occurs in a short period of time, such as during fast gait. However, whether this relationship between beta power and motor states persists upon parkinsonian onset or in response to effective therapy is unclear...
May 30, 2018: Neurobiology of Disease
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