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Essential Tremor

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Anti-Tremor Action of Subtype Selective Positive Allosteric Modulators of GABAA Receptors in a Rat Model of Essential Tremors.

Dipak V Amrutkar, Tino Dyhring, Thomas A Jacobsen, Janus S Larsen, Karin Sandager-Nielsen,

Essential tremor (ET) is among the most prevalent neurological disorders and the most common cause of abnormal tremors. It is characterized by postural and action tremors ranging from 4 to 12 Hz. The treatments of choice for ET are propranolol and primidone, but their use is associated with adverse effects like ... Read more >>

Cerebellum (Cerebellum (London, England))
[2020, 19(2):265-274]

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Visualisation of Parkinsonian, essential and physiological tremor planes in 3Dspace.

P Jombík, P Spodniak, V Bahýľ, J Necpál,

Based on the fact that tremors display some distinct 3D spatial characteristics, we decided to visualise tremor planes in 3D space. We obtained 3-axial linear accelerometer signals of hand tremors from 58 patients with Parkinson´s disease (PD), 37 with isolated resting tremor (iRT), 75 with essential tremor (ET), and 44 ... Read more >>

Physiol Res (Physiological research)
[2020, :]

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Distinct non-motor features of essential tremor with head tremor patients.

Jiaxin Peng, Ling Wang, Nannan Li, Junying Li, Liren Duan, Rong Peng,

BACKGROUND:There have been few comprehensive scale studies on the non-motor symptoms (NMS) of patients with essential tremor (ET) with head tremor (ETh) and those with ET without head tremor (ETol). We aimed to explore the motor symptoms and NMS of these two subgroups. METHODS:We enrolled 199 patients with ET (125, ... Read more >>

Acta Neurol. Scand. (Acta neurologica Scandinavica)
[2020, :]

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Genetic testing of FUS, HTRA2, and TENM4 genes in Chinese patients with essential tremor.

Ya-Ping Yan, Cong-Ying Xu, Lu-Yan Gu, Bo Zhang, Ting Shen, Ting Gao, Jun Tian, Jia-Li Pu, Xin-Zhen Yin, Bao-Rong Zhang, Guo-Hua Zhao,

INTRODUCTION:Essential tremor (ET) is one of the most prevalent movement disorders. The genetic etiology of ET has not been well defined although a significant proportion (≥50%) are familial cases. Linkage analysis and genome-wide association studies (GWASs) have identified several risk variants. In recent years, whole-exome sequencing of ET has revealed ... Read more >>

CNS Neurosci Ther (CNS neuroscience & therapeutics)
[2020, :]

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Distinct cortical activity patterns in Parkinson's disease and essential tremor during a bimanual tapping task.

Frauke Luft, Sarvi Sharifi, Winfred Mugge, Alfred C Schouten, Lo J Bour, Anne Fleur van Rootselaar, Peter H Veltink, Tijtske Heida,

BACKGROUND:Parkinson's disease (PD) and essential tremor (ET) are neurodegenerative diseases characterized by movement deficits. Especially in PD, maintaining cyclic movement can be significantly disturbed due to pathological changes in the basal ganglia and the cerebellum. Providing external cues improves timing of these movements in PD and also affects ET. The ... Read more >>

J Neuroeng Rehabil (Journal of neuroengineering and rehabilitation)
[2020, 17(1):45]

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Pramipexole Reduces zif-268 mRNA Expression in Brain Structures involved in the Generation of Harmaline-Induced Tremor.

Barbara Kosmowska, Krystyna Ossowska, Jadwiga Wardas,

Essential tremor is one of the most common neurological disorders, however, it is not sufficiently controlled with currently available pharmacotherapy. Our recent study has shown that pramipexole, a drug efficient in inhibiting parkinsonian tremor, reduced the harmaline-induced tremor in rats, generally accepted to be a model of essential tremor. The ... Read more >>

Neurochem. Res. (Neurochemical research)
[2020, :]

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Sleep Disorders in Essential Tremor: Systematic Review and Meta-Analysis.

Félix Javier Jiménez-Jiménez, Hortensia Alonso-Navarro, Elena García-Martín, José A G Agúndez,

Sleep disorders are frequent in patients diagnosed with essential tremor (ET). The present review focuses on sleep disorders and the results of polysomnographic studies performed in patients with ET. For this purpose we performed a systematic review crossing the search term "essential tremor" with "sleep", "sleep disorders", "sleep disturbances" and ... Read more >>

Sleep (Sleep)
[2020, :]

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PSA and VIM DBS efficiency in essential tremor depends on distance to the dentatorubrothalamic tract.

Till A Dembek, Jan Niklas Petry-Schmelzer, Paul Reker, Jochen Wirths, Stefanie Hamacher, Julia Steffen, Haidar S Dafsari, Mauritius Hövels, Gereon R Fink, Veerle Visser-Vandewalle, Michael T Barbe,

OBJECTIVE:To investigate the relation between deep brain stimulation (DBS) of the posterior-subthalamic-area (PSA) and the ventral-intermediate-nucleus (VIM) and the distance to the dentatorubrothalamic tract (DRTT) in essential tremor (ET). METHODS:Tremor rating scale (TRS) hemi-scores were analyzed in 13 ET patients, stimulated in both the VIM and the PSA in a ... Read more >>

Neuroimage Clin (NeuroImage. Clinical)
[2020, 26:102235]

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Deep brain stimulation in essential tremor: targets, technology, and a comprehensive review of clinical outcomes.

Joshua K Wong, Christopher W Hess, Leonardo Almeida, Erik H Middlebrooks, Evangelos A Christou, Erin E Patrick, Aparna Wagle Shukla, Kelly D Foote, Michael S Okun,

Introduction: Essential tremor (ET) is a common movement disorder with an estimated prevalence of 0.9% worldwide. Deep brain stimulation (DBS) is an established therapy for medication refractory and debilitating tremor. With the arrival of next generation technology, the implementation and delivery of DBS has been rapidly evolving. This review will ... Read more >>

Expert Rev Neurother (Expert review of neurotherapeutics)
[2020, :1-13]

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Author Response to Letter to the Editor.

Victoria Castrillo-Fraile, Elena Casas Peña, José María Trejo Gabriel Y Galán, Pedro David Delgado-López, Carla Collazo, Esther Cubo,

Tremor Other Hyperkinet Mov (N Y) (Tremor and other hyperkinetic movements (New York, N.Y.))
[2020, 10:]

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A Population Model of Deep Brain Stimulation in Movement Disorders From Circuits to Cells.

Nada Yousif, Peter G Bain, Dipankar Nandi, Roman Borisyuk,

For more than 30 years, deep brain stimulation (DBS) has been used to target the symptoms of a number of neurological disorders and in particular movement disorders such as Parkinson's disease (PD) and essential tremor (ET). It is known that the loss of dopaminergic neurons in the substantia nigra leads ... Read more >>

Front Hum Neurosci (Frontiers in Human Neuroscience)
[2020, 14:55]

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The Validation of Tremor-Cancelling Technologies Needs a Multidisciplinary Consensus Statement.

Roberto López-Blanco, Julián Benito-León, Jesús Hernández-Gallego, Álvaro Sánchez-Ferro,

Tremor Other Hyperkinet Mov (N Y) (Tremor and other hyperkinetic movements (New York, N.Y.))
[2020, 10:]

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The Effects of Deep Brain Stimulation on Speech Intelligibility in Persons With Essential Tremor.

Linda Sandström, Patric Blomstedt, Fredrik Karlsson, Lena Hartelius,

Purpose The aim of this study was to investigate how deep brain stimulation (DBS) of the caudal zona incerta (cZi) affects speech intelligibility in persons with essential tremor. Method Thirty-five participants were evaluated: off stimulation, on chronic stimulation optimized to alleviate tremor, and during unilateral stimulation at increasing amplitude levels. ... Read more >>

J. Speech Lang. Hear. Res. (Journal of speech, language, and hearing research : JSLHR)
[2020, 63(2):456-471]

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Cortical network fingerprint and prediction of deep brain stimulation-induced speech impairment in essential tremor

Jan Niklas Petry-Schmelzer, Hannah Jergas, Tabea Thies, Julia Steffen, Paul Reker, Haidar Dafsari, Doris Mücke, Gereon Fink, Veerle Visser-Vandewalle, Till Dembek, Michael Barbe,

Abstract Thalamic deep brain stimulation (DBS) is an effective treatment for patients with medically refractory essential tremor. However, stimulation-induced side-effects, especially stimulation-induced dysarthria (SID), interfere severely with quality of life and postoperative tremor control. Here, we present a functional and structural network approach to SID to gain insights into the ... Read more >>

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Characterizing vocal tremor in progressive neurological diseases via automated acoustic analyses.

Jan Hlavnička, Tereza Tykalová, Olga Ulmanová, Petr Dušek, Dana Horáková, Evžen Růžička, Jiří Klempíř, Jan Rusz,

OBJECTIVE:Voice tremor represents a common but frequently overlooked clinical feature of neurological disease. Therefore, we aimed to quantitatively and objectively assess the characteristics of voice tremor in a large sample of patients with various progressive neurological diseases. METHODS:Voice samples were acquired from 240 patients with neurological disease and 40 healthy ... Read more >>

Clin Neurophysiol (Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology)
[2020, :]

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Hippocampal impairment in patients with Essential Tremor.

Fabiana Novellino, Roberta Vasta, Valeria Saccà, Rita Nisticò, Maurizio Morelli, Gennarina Arabia, Carmelina Chiriaco, Gaetano Barbagallo, Giuseppe Nicoletti, Maria Salsone, Aldo Quattrone,

INTRODUCTION:There is growing evidence that a proportion of patients with Essential Tremor (ET) may develop a memory impairment over time. However, no studies have evaluated whether hippocampal damage really occur in ET. This study investigated the macro and micro-structural integrity of the hippocampus in ET subjects using a multimodal MRI ... Read more >>

Parkinsonism Relat. Disord. (Parkinsonism & related disorders)
[2020, 72:56-61]

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Telemedicine for Hyperkinetic Movement Disorders.

Ragini Srinivasan, Hilla Ben-Pazi, Marieke Dekker, Esther Cubo, Bas Bloem, Emile Moukheiber, Josefa Gonzalez-Santos, Mark Guttman,

Telemedicine is the use of electronic communication technology to facilitate healthcare between distant providers and patients. In addition to synchronous video conferencing, asynchronous video transfer has been used to support care for neurology patients. There is a growing literature on using telemedicine in movement disorders, with the most common focus ... Read more >>

Tremor Other Hyperkinet Mov (N Y) (Tremor and other hyperkinetic movements (New York, N.Y.))
[2020, 10:]

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Response: Commentary: Using Directional Deep Brain Stimulation to Co-activate the Subthalamic Nucleus and Zona Incerta for Overlapping Essential Tremor/Parkinson's Disease Symptoms.

Drew Falconer, Sean Rogers, Mahesh Shenai,

Front Neurol (Frontiers in neurology)
[2020, 11:100]

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Optical Measurements during Asleep Deep Brain Stimulation Surgery along Vim-Zi Trajectories.

Peter Zsigmond, Karin Wårdell,

BACKGROUND:Optics can be used for guidance in deep brain stimulation (DBS) surgery. The aim was to use laser Doppler flowmetry (LDF) to investigate the intraoperative optical trajectory along the ventral intermediate nucleus (VIM) and zona incerta (Zi) regions in patients with essential tremor during asleep DBS surgery, and whether the ... Read more >>

Stereotact Funct Neurosurg (Stereotactic and functional neurosurgery)
[2020, 98(1):55-61]

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Pallidal Activity in Cervical Dystonia with and Without Head Tremor.

Alexey Sedov, Svetlana Usova, Ulia Semenova, Anna Gamaleya, Alexey Tomskiy, Sinem B Beylergil, H A Jinnah, Aasef G Shaikh,

The relationship between two common movement disorders, dystonia and tremor, is controversial. Both deficits have correlates in the network that includes connections between the cerebellum and the basal ganglia. In order to assess the physiological relationship between tremor and dystonia, we measured the activity of 727 pallidal single-neurons during deep ... Read more >>

Cerebellum (Cerebellum (London, England))
[2020, :]

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High resolution transcranial acoustoelectric imaging of current densities from a directional deep brain stimulator.

Chet Preston, Alexander M Alvarez, Andres Barragan, Jennifer Becker, Willard S Kasoff, Russell S Witte,

OBJECTIVE:New innovations in deep brain stimulation (DBS) enable directional current steering-allowing more precise electrical stimulation of the targeted brain structures for Parkinson's disease, essential tremor and other neurological disorders. While intra-operative navigation through MRI or CT approaches millimeter accuracy for placing the DBS leads, no existing modality provides feedback of ... Read more >>

J Neural Eng (Journal of neural engineering)
[2020, 17(1):016074]

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Neuropathological correlates of parkinsonian disorders in a large Dutch autopsy series.

H. Geut, D. H. Hepp, E. Foncke, H. W. Berendse, J. M. Rozemuller, I. Huitinga, W. D. J. van de Berg,

The clinical diagnosis in patients with parkinsonian disorders can be challenging, and a definite diagnosis requires neuropathological confirmation. The aim of this study was to examine whether a clinical diagnosis of Parkinson’s disease (PD) and atypical parkinsonian disorders predict the presence of Lewy pathology (LP) and concomitant neuropathological lesions.We included ... Read more >>

Acta Neuropathol Commun (Acta Neuropathologica Communications)
[2020, 8:]

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Erratum. Magnetic resonance-guided focused ultrasound thalamotomy for essential tremor: a 5-year single-center experience.

Ilana Schlesinger,

J. Neurosurg. (Journal of neurosurgery)
[2020, :1]

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Longitudinal follow-up with VIM thalamic deep brain stimulation for dystonic or essential tremor.

Takashi Tsuboi, Zakia Jabarkheel, Pamela R Zeilman, Matthew J Barabas, Kelly D Foote, Michael S Okun, Aparna Wagle Shukla,

OBJECTIVE:To assess longitudinal tremor outcomes with ventral intermediate nucleus deep brain stimulation (VIM DBS) in patients with dystonic tremor (DT) and to compare with DBS outcomes in essential tremor (ET). METHODS:We retrospectively investigated VIM DBS outcomes for 163 patients followed at our center diagnosed with either DT or ET. The ... Read more >>

Neurology (Neurology)
[2020, 94(10):e1073-e1084]

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"Essential Tremor Plus": A Problematic Concept: Implications for Clinical and Epidemiological Studies of Essential Tremor.

Elan D Louis,

BACKGROUND:An issue of central importance for most neurological disorders is that of case definition. In the field of neuroepidemiology, case definition informs the design, conduct, and interpretation of research studies that range from observational to interventional studies, from case-control to cohort studies, and from descriptive to analytical studies. For essential ... Read more >>

Neuroepidemiology (Neuroepidemiology)
[2020, 54(2):180-184]

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