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Subthalamic nucleus

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https://www.readbyqxmd.com/read/29661966/pallidal-deep-brain-stimulation-disrupts-pallidal-beta-oscillations-and-coherence-with-primary-motor-cortex-in-parkinson-s-disease
#1
Doris D Wang, Coralie de Hemptinne, Svjetlana Miocinovic, Jill L Ostrem, Nicholas B Galifianakis, Marta San Luciano, Philip A Starr
In Parkinson's disease (PD), subthalamic nucleus beta band oscillations are decreased by therapeutic deep brain stimulation (DBS) and this has been proposed as important to the mechanism of therapy. The globus pallidus is a common alternative target for PD with similar motor benefits as subthalamic DBS, but effects of pallidal stimulation in PD are not well studied, and effects of pallidal DBS on cortical function in PD are unknown. Here, in 20 PD and 14 isolated dystonia human patients of both genders undergoing pallidal DBS lead implantation, we recorded local field potentials (LFPs) from the globus pallidus and in a subset of these, recorded simultaneous sensorimotor cortex electrocorticography (ECoG) potentials...
April 16, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29659494/deep-brain-stimulation-of-the-subthalamic-nucleus-in-patients-with-parkinson-disease-with-prior-pallidotomy-or-thalamotomy
#2
Elena A Khabarova, Natalia P Denisova, Aleksandr B Dmitriev, Konstantin V Slavin, Leo Verhagen Metman
Objective. To evaluate the efficacy of deep brain stimulation of the subthalamic nucleus (STN DBS) in patients with Parkinson disease (PD) who previously underwent lesioning of the basal ganglia. Material and methods. The study included 22 patients who underwent STN DBS. Eleven patients had undergone prior unilateral pallidotomy ( n = 6) or VL/VIM thalamotomy ( n = 5) while the other 11 patients had not. The primary outcome was the change from baseline in the motor subscore of the Unified Parkinson Disease Rating Scale (UPDRS-III) 12 months after STN DBS...
April 16, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29657957/the-effect-of-deep-brain-stimulation-therapy-on-fear-related-capture-of-attention-in-parkinson-s-disease-and-essential-tremor-a-comparison-to-healthy-individuals
#3
Corrie R Camalier, Maureen McHugo, David H Zald, Joseph S Neimat
In addition to motor symptoms, Parkinson's disease (PD) involves significant non-motor sequelae, including disruptions in cognitive and emotional processing. Fear recognition appears to be affected both by the course of the disease and by a common interventional therapy, deep brain stimulation of the subthalamic nucleus (STN-DBS). Here, we examined if these effects extend to other aspects of emotional processing, such as attentional capture by negative emotional stimuli. Performance on an emotional attentional blink (EAB) paradigm, a common paradigm used to study emotional capture of attention, was examined in a cohort of individuals with PD, both on and off STN-DBS therapy (n=20)...
2018: Journal of Neurological Disorders
https://www.readbyqxmd.com/read/29655587/short-term-quality-of-life-after-subthalamic-stimulation-depends-on-non-motor-symptoms-in-parkinson-s-disease
#4
Haidar Salimi Dafsari, Luisa Weiß, Monty Silverdale, Alexandra Rizos, Prashanth Reddy, Keyoumars Ashkan, Julian Evans, Paul Reker, Jan Niklas Petry-Schmelzer, Michael Samuel, Veerle Visser-Vandewalle, Angelo Antonini, Pablo Martinez-Martin, K Ray-Chaudhuri, Lars Timmermann
BACKGROUND: Subthalamic nucleus (STN) deep brain stimulation (DBS) improves quality of life (QoL), motor, and non-motor symptoms (NMS) in advanced Parkinson's disease (PD). However, considerable inter-individual variability has been observed for QoL outcome. HYPOTHESIS: We hypothesized that demographic and preoperative NMS characteristics can predict postoperative QoL outcome. METHODS: In this ongoing, prospective, multicenter study (Cologne, Manchester, London) including 88 patients, we collected the following scales preoperatively and on follow-up 6 months postoperatively: PDQuestionnaire-8 (PDQ-8), NMSScale (NMSS), NMSQuestionnaire (NMSQ), Scales for Outcomes in PD (SCOPA)-motor examination, -complications, and -activities of daily living, levodopa equivalent daily dose...
February 24, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29655586/non-motor-outcomes-of-subthalamic-stimulation-in-parkinson-s-disease-depend-on-location-of-active-contacts
#5
Haidar Salimi Dafsari, Jan Niklas Petry-Schmelzer, K Ray-Chaudhuri, Keyoumars Ashkan, Luca Weis, Till A Dembek, Michael Samuel, Alexandra Rizos, Monty Silverdale, Michael T Barbe, Gereon R Fink, Julian Evans, Pablo Martinez-Martin, Angelo Antonini, Veerle Visser-Vandewalle, Lars Timmermann
BACKGROUND: Subthalamic nucleus (STN) deep brain stimulation (DBS) improves quality of life (QoL), motor, and non-motor symptoms (NMS) in Parkinson's disease (PD). Few studies have investigated the influence of the location of neurostimulation on NMS. OBJECTIVE: To investigate the impact of active contact location on NMS in STN-DBS in PD. METHODS: In this prospective, open-label, multicenter study including 50 PD patients undergoing bilateral STN-DBS, we collected NMSScale (NMSS), NMSQuestionnaire (NMSQ), Hospital Anxiety and Depression Scale (anxiety/depression, HADS-A/-D), PDQuestionnaire-8 (PDQ-8), Scales for Outcomes in PD-motor examination, motor complications, activities of daily living (ADL), and levodopa equivalent daily dose (LEDD) preoperatively and at 6 months follow-up...
March 16, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29651998/high-resolution-local-field-potentials-measured-with-deep-brain-stimulation-arrays
#6
Simeng Zhang, Allison T Connolly, Lauren Madden, Jerrold L Vitek, Matthew D Johnson
Local field potential (LFP) recordings along a deep brain stimulation (DBS) lead can provide useful feedback for titrating DBS therapy. However, conventional DBS leads with four cylindrical macroelectrodes likely undersample the spatial distribution of sinks and sources in a given brain region. In this study, we investigated the spectral power and spatial feature sizes of LFP activity in non-human primate subthalamic nucleus and globus pallidus using chronically implanted 32-channel directional DBS arrays.
 
 Approach: Subthalamic nucleus and globus pallidus LFP signals were recorded from directional DBS arrays in the resting state and during a reach-and-retrieval task in two non-human primates in naïve and parkinsonian conditions...
April 13, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29644757/does-deep-brain-stimulation-of-the-subthalamic-nucleus-prolong-survival-in-parkinson-s-disease
#7
Maria Fiorella Contarino, Johan Marinus, Jacobus J van Hilten
No abstract text is available yet for this article.
April 11, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29643480/the-basal-ganglia-and-the-cerebellum-nodes-in-an-integrated-network
#8
REVIEW
Andreea C Bostan, Peter L Strick
The basal ganglia and the cerebellum are considered to be distinct subcortical systems that perform unique functional operations. The outputs of the basal ganglia and the cerebellum influence many of the same cortical areas but do so by projecting to distinct thalamic nuclei. As a consequence, the two subcortical systems were thought to be independent and to communicate only at the level of the cerebral cortex. Here, we review recent data showing that the basal ganglia and the cerebellum are interconnected at the subcortical level...
April 11, 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29615861/lead-induced-atypical-parkinsonism-in-rats-behavioral-electrophysiological-and-neurochemical-evidence-for-a-role-of-noradrenaline-depletion
#9
Mariam Sabbar, Claire Delaville, Philippe De Deurwaerdère, Nouria Lakhdar-Ghazal, Abdelhamid Benazzouz
Background: Lead neurotoxicity is a major health problem known as a risk factor for neurodegenerative diseases, including the manifestation of parkinsonism-like disorder. While lead is known to preferentially accumulate in basal ganglia, the mechanisms underlying behavioral disorders remain unknown. Here, we investigated the neurophysiological and biochemical correlates of motor deficits induced by sub-chronic injections of lead. Methods: Sprague Dawely rats were exposed to sub-chronic injections of lead (10 mg/kg, i...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29614762/long-term-satisfaction-and-patient-centered-outcomes-of-deep-brain-stimulation-in-parkinson-s-disease
#10
Jessica A Karl, Bichun Ouyang, Kalea Colletta, Leo Verhagen Metman
Bilateral subthalamic nucleus (STN) deep brain stimulation (DBS) is an effective and proven treatment option for patients with advanced Parkinson's disease (PD). Long-term outcomes (>5 years) have demonstrated sustained improvement in objective motor symptoms; however, few studies have evaluated patient-centered outcomes other than quality of life (QOL). A locally developed DBS-patient-centered outcomes questionnaire was administered to PD patients >5 years post-DBS. All questions were scored on a ten-point scale, whereby 0 represented the most 'positive' answer and 10 the most 'negative' answer...
April 1, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29608802/king-s-parkinson-s-disease-pain-scale-for-assessment-of-pain-relief-following-deep-brain-stimulation-for-parkinson-s-disease
#11
Marisa DiMarzio, Julie G Pilitsis, Lucy Gee, Sophia Peng, Julia Prusik, Jennifer Durphy, Adolfo Ramirez-Zamora, Era Hanspal, Eric Molho, Sarah E McCallum
OBJECTIVE: Pain is a prevalent and debilitating nonmotor symptom of Parkinson's disease (PD) that is often inadequately managed. Deep brain stimulation (DBS) has been shown to relieve pain in PD but an effective method of identifying which types of PD pain respond to DBS has not been established. We examine the effects of DBS on different types of PD pain using the King's Parkinson's disease pain scale (KPDPS), the only validated scale of PD pain. METHODS: We prospectively followed 18 PD patients undergoing subthalamic nucleus (STN) or Globus pallidus interna (GPi) DBS...
April 2, 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29607241/longitudinal-follow-up-of-impedance-drift-in-deep-brain-stimulation-cases
#12
Joshua Wong, Aysegul Gunduz, Jonathan Shute, Robert Eisinger, Stephanie Cernera, Kwo Wei David Ho, Daniel Martinez-Ramirez, Leonardo Almeida, Christina A Wilson, Michael S Okun, Christopher W Hess
Background: Impedance is an integral property of neuromodulation devices that determines the current delivered to brain tissue. Long-term variability in therapeutic impedance following deep brain stimulation (DBS) has not been extensively investigated across different brain targets. The aim was to evaluate DBS impedance drift and variability over an extended postoperative period across common DBS targets. Methods: Retrospective data from 1,764 electrode leads were included and drawn from 866 DBS patients enrolled in the University of Florida Institutional Review Board-approved INFORM database and analyzed up to 84 months post implantation...
2018: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/29606416/mechanisms-underlying-decision-making-as-revealed-by-deep-brain-stimulation-in-patients-with-parkinson-s-disease
#13
Damian M Herz, Simon Little, David J Pedrosa, Gerd Tinkhauser, Binith Cheeran, Tom Foltynie, Rafal Bogacz, Peter Brown
To optimally balance opposing demands of speed and accuracy during decision-making, we must flexibly adapt how much evidence we require before making a choice. Such adjustments in decision thresholds have been linked to the subthalamic nucleus (STN), and therapeutic STN deep-brain stimulation (DBS) has been shown to interfere with this function. Here, we performed continuous as well as closed-loop DBS of the STN while Parkinson's disease patients performed a perceptual decision-making task. Closed-loop STN DBS allowed temporally patterned STN stimulation and simultaneous recordings of STN activity...
March 20, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29605702/the-role-of-the-cortico-subthalamic-hyperdirect-pathway-in-deep-brain-stimulation-for-the-treatment-of-parkinson-s-disease-a-diffusion-tensor-imaging-study
#14
Yukun Chen, Shunnan Ge, Yang Li, Nan Li, Jing Wang, Xin Wang, Jiaming Li, Jiangpeng Jing, Mingming Su, Zhaohui Zheng, Tian Luo, Chun Qiu, Xuelian Wang
OBJECTIVE: The aim of our study was to evaluate the clinical effect of the position of stimulation contacts relative to the hyperdirect pathway (HDP) on the alleviation of motor symptoms in patients with Parkinson's disease (PD). METHODS: A group of 11 patients diagnosed with idiopathic PD were included in this study, and all selected targets were in the subthalamic nucleus (STN). One patient was implanted with a single side electrode due to unilateral symptoms, and all others were implanted with bilateral electrodes containing 4 discrete contacts...
March 29, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29590745/high-frequency-stimulation-of-the-subthalamic-nucleus-activates-motor-cortex-pyramidal-tract-neurons-by-a-process-involving-local-glutamate-gaba-and-dopamine-receptors-in-hemi-parkinsonian-rats
#15
Chi-Fen Chuang, Chen-Wei Wu, Ying Weng, Pei-San Hu, Shin-Rung Yeh, Yen-Chung Chang
Deep brain stimulation (DBS) is widely used to treat advanced Parkinson’s disease. Here, we investigated how DBS applied on the subthalamic nucleus (STN) influenced the neural activity in the motor cortex. Rats, which had the midbrain dopaminergic neurons partially depleted unilaterally, called the hemi-Parkinsonian rats, were used as a study model. c-Fos expression in the neurons was used as an indicator of neural activity. Application of high-frequency stimulation (HFS) upon the STN was used to mimic the DBS treatment...
March 29, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29577359/nmda-receptor-blockade-ameliorates-abnormalities-of-spike-firing-of-subthalamic-nucleus-neurons-in-a-parkinsonian-nonhuman-primate
#16
Subhrajit Bhattacharya, Yuxian Ma, Amy R Dunn, Joshua M Bradner, Annalisa Scimemi, Gary W Miller, Stephen F Traynelis, Thomas Wichmann
N-methyl-D-aspartate receptors (NMDARs) are ion channels comprising tetrameric assemblies of GluN1 and GluN2 receptor subunits that mediate excitatory neurotransmission in the central nervous system. Of the four different GluN2 subunits, the GluN2D subunit-containing NMDARs have been suggested as a target for antiparkinsonian therapy because of their expression pattern in some of the basal ganglia nuclei that show abnormal firing patterns in the parkinsonian state, specifically the subthalamic nucleus (STN)...
March 25, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29572280/beta-oscillations-and-urinary-voiding-in-parkinson-disease
#17
Holly A Roy, Tipu Z Aziz, James J Fitzgerald, Alexander L Green
OBJECTIVES: To investigate the role of beta oscillations in urinary voiding and their association with lower urinary tract symptoms in Parkinson disease (PD). METHODS: We used surgically implanted deep brain stimulation electrodes to record local field potential signals from the subthalamic nucleus (STN) and globus pallidus interna (GPi) of patients with PD during urinary voiding. Five patients with STN electrodes and 5 patients with GPi electrodes were tested. We also explored correlations between beta oscillatory power and urinary symptoms assessed by the International Consultation on Incontinence Lower Urinary Tract Symptoms questionnaire...
March 23, 2018: Neurology
https://www.readbyqxmd.com/read/29570012/validation-of-diffusion-tensor-imaging-tractography-to-visualize-the-dentatorubrothalamic-tract-for-surgical-planning
#18
Andreas Nowacki, Jürgen Schlaier, Ines Debove, Claudio Pollo
OBJECTIVE The dentatorubrothalamic tract (DRTT) has been suggested as the anatomical substrate for deep brain stimulation (DBS)-induced tremor alleviation. So far, little is known about how accurately and reliably tracking results correspond to the anatomical DRTT. The objective of this study was to systematically investigate and validate the results of different tractography approaches for surgical planning. METHODS The authors retrospectively analyzed 4 methodological approaches for diffusion tensor imaging (DTI)-based fiber tracking using different regions of interest in 6 patients with essential tremor...
March 23, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29567582/intra-operative-characterisation-of-subthalamic-oscillations-in-parkinson-s-disease
#19
Xinyi Geng, Xin Xu, Andreas Horn, Ningfei Li, Zhipei Ling, Peter Brown, Shouyan Wang
OBJECTIVE: This study aims to use the activities recorded directly from the deep brain stimulation (DBS) electrode to address the focality and distinct nature of the local field potential (LFP) activities of different frequency. METHODS: Pre-operative and intra-operative magnetic resonance imaging (MRI) were acquired from patients with Parkinson's disease (PD) who underwent DBS in the subthalamic nucleus and intra-operative LFP recording at rest and during cued movements...
May 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29566177/degradation-of-neuronal-encoding-of-speech-in-the-subthalamic-nucleus-in-parkinson-s-disease
#20
Ariel Tankus, Itzhak Fried
BACKGROUND: Most of the patients with Parkinson's disease suffer from speech disorders characterized mainly by dysarthria and hypophonia. OBJECTIVE: To understand the deterioration of speech in the course of Parkinson's disease. METHODS: We intraoperatively recorded single neuron activity in the subthalamic nucleus of 18 neurosurgical patients with Parkinson's disease undergoing implantation of deep brain stimulator while patients articulated 5 vowel sounds...
March 15, 2018: Neurosurgery
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