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https://www.readbyqxmd.com/read/28442304/topography-of-essential-tremor
#1
Wei Chen, Franziska Hopfner, Silke Szymczak, Oliver Granert, Stefanie H Müller, Gregor Kuhlenbäumer, Günther Deuschl
INTRODUCTION: Topography of tremor manifestations is poorly investigated in essential tremor. The present study explores the prevalence and clinical correlates of head and/or voice tremor in essential tremor. METHODS: Out of a prospectively designed registry of 972 patients, 884 patients with definite and probable essential tremor had complete information on tremor localization. Demographic and clinical characteristics were compared among four subgroups: group A (without head or voice tremor, n = 619), B (with head but without voice tremor, n = 155), C (with voice but without head tremor, n = 47), and D (with both head and voice tremor, n = 63)...
April 20, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28433987/radiofrequency-lesions-through-deep-brain-stimulation-electrodes-in-movement-disorders-case-report-and-review-of-the-literature
#2
Javier Pérez-Suárez, Cristina V Torres Díaz, Lydia López Manzanares, Marta Navas García, Jesús Pastor, Patricia Barrio Fernández, Rafael G de Sola
BACKGROUND: Although there are few reports of radiofrequency lesions performed through deep brain stimulation (DBS) electrodes in patients with movement disorders, experience with this method is scarce. METHODS: We present 2 patients who had been previously treated with DBS of subthalamic nuclei (STN) and the ventral intermediate (VIM) nucleus of the thalamus for Parkinson's disease and essential tremor, respectively, and underwent a radiofrequency lesion through their DBS electrodes after developing a hardware infection...
April 22, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28426143/coronal-transcranial-sonography-and-m-mode-tremor-frequency-determination-in-parkinson-s-disease-and-essential-tremor
#3
Daniel Richter, Dirk Woitalla, Siegfried Muhlack, Ralf Gold, Lars Tönges, Christos Krogias
BACKGROUND AND PURPOSE: The axial mesencephalic transcranial sonography plane is an established and sensitive diagnostic tool for the differentiation of Parkinson's disease and essential tremor. However, the substantia nigra can also be depicted in a second coronal examination plane, whose diagnostic value has not yet been evaluated. Furthermore, the M-mode tremor frequency determination represents another sonographic tool, which might yield additional diagnostic value. METHODS: We included patients with diagnosed Parkinson's disease (n = 31), essential tremor (n = 16), and healthy age-matched controls (n = 16)...
April 20, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28412948/a-computerized-tablet-system-for-evaluating-treatment-of-essential-tremor-by-magnetic-resonance-guided-focused-ultrasound
#4
Fred Tam, Yuexi Huang, Michael L Schwartz, Tom A Schweizer, Kullervo Hynynen, Simon J Graham
BACKGROUND: Transcranial magnetic resonance guided focused ultrasound is an emerging technology under evaluation for treatment of essential tremor, a prevalent movement disorder. A qualitative evaluation is performed by a clinician periodically during the procedure to maximize treatment effects and minimize adverse effects. The present work demonstrates a magnetic resonance-compatible method to enable more precise, quantitative measurement of tremor severity. METHODS: Tremor severity was measured in 12 patients pre-, post-, and intra-operatively, using a magnetic resonance-compatible tablet and a computerized adaptation of drawing tasks from the widely-used Fahn-Tolosa-Marin Tremor Rating Scale...
April 17, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28409827/topiramate-for-essential-tremor
#5
REVIEW
Elisa Bruno, Alessandra Nicoletti, Graziella Quattrocchi, Roberta Allegra, Graziella Filippini, Carlo Colosimo, Mario Zappia
BACKGROUND: Essential tremor (ET) is one of the most common movement disorders. The management is primarily based on pharmacological agents and in clinical practice propranolol and primidone are considered the first-line therapy. However, these treatments can be ineffective in 25% to 55% of people and are frequently associated with serious adverse events (AEs). For these reasons, it is worthwhile evaluating other treatments for ET. Topiramate has been suggested as a potentially useful agent for the treatment of ET but there is uncertainty about its efficacy and safety...
April 14, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28409750/clinical-characteristics-of-parkinson-s-disease-developed-from-essential-tremor
#6
Dong-Woo Ryu, Si-Hoon Lee, Yoon-Sang Oh, Jae-Young An, Jeong-Wook Park, In-Uk Song, Kwang-Soo Lee, Joong-Seok Kim
BACKGROUND: Recent genetic and epidemiological studies have shown that there is a link between essential tremor and Parkinson's disease (PD). However, there is a lack of data about the clinical features of PD developed from essential tremor. OBJECTIVE: To explore and describe the clinical characteristics of Parkinson's disease developed from essential tremor (ET-PD). METHODS: Twenty-five ET-PD patients and 124 IPD controls were enrolled according to each criterion...
April 13, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28400200/thalamic-dbs-with-a-constant-current-device-in-essential-tremor-a%C3%A2-controlled-clinical-trial
#7
Robert E Wharen, Michael S Okun, Barton L Guthrie, Ryan J Uitti, Paul Larson, Kelly Foote, Harrison Walker, Frederick J Marshall, Jason Schwalb, Blair Ford, Joseph Jankovic, Richard Simpson, Khashayar Dashtipour, Fenna Phibbs, Joseph S Neimat, R Malcolm Stewart, DeLea Peichel, Rajesh Pahwa, Jill L Ostrem
INTRODUCTION: This study of thalamic deep brain stimulation (DBS) investigated whether a novel constant-current device improves tremor and activities of daily living (ADL) in patients with essential tremor (ET). METHODS: A prospective, controlled, multicenter study was conducted at 12 academic centers. We investigated the safety and efficacy of unilateral and bilateral constant-current DBS of the ventralis intermedius (VIM) nucleus of the thalamus in patients with essential tremor whose tremor was inadequately controlled by medications...
March 30, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28389133/feasibility-study-effect-of-hand-resistance-exercise-on-handwriting-in-parkinson-s-disease-and-essential-tremor
#8
Mon S Bryant, Craig D Workman, Fariha Jamal, Hao Meng, George R Jackson
STUDY DESIGN: A single group, repeated measures design was used. INTRODUCTION: Tremor can lead to impaired hand function in patients with Parkinson's disease (PD) and essential tremor (ET). Difficulty with handwriting is a common complaint in these patients suffering from hand tremors. The effect of hand resistance exercise on handwriting is unknown. PURPOSE OF THE STUDY: To explore the influence of 6 weeks of home-based hand resistance exercise on handwriting in individuals with PD and ET...
April 4, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28387629/is-staged-bilateral-thalamic-radiosurgery-an-option-for-otherwise-surgically-ineligible-patients-with-medically-refractory-bilateral-tremor
#9
Ajay Niranjan, Sudesh S Raju, Edward A Monaco, John C Flickinger, L Dade Lunsford
OBJECTIVE Unilateral Gamma Knife thalamotomy (GKT) is a well-established treatment for patients with medically refractory tremor who are not eligible for invasive procedures due to increased risk of compications. The purpose of this study was to evaluate whether staged bilateral GKT provides benefit with acceptable risk to patients suffering from disabling medically refractory bilateral tremor. METHODS Eleven patients underwent staged bilateral GKT during a 17-year period (1999-2016). Eight patients had essential tremor (ET), 2 had Parkinson's disease (PD)-related tremor, and 1 had multiple-sclerosis (MS)-related tremor...
April 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28382111/emerging-strategies-in-the-management-of-essential-tremor
#10
REVIEW
Peter Hedera
Currently available therapies for essential tremor (ET) provide sufficient control only for less than a half of patients and many unmet needs exist. This is in part due to the empiric nature of existing treatment options and persisting uncertainties about the pathogenesis of ET. The emerging concept of ET as a possible neurodegenerative disorder, better understanding of associated biochemical changes, including alterations in the γ-aminobutyric acid (GABA)-ergic system and gap junctions, and the identification of the role of the leucine-rich repeat and immunoglobulin-like domain-containing 1 (LINGO-1) gene in ET pathogenesis suggest new avenues for more targeted therapies...
February 2017: Therapeutic Advances in Neurological Disorders
https://www.readbyqxmd.com/read/28379503/letter-thalamotomy-like-effects-from-partial-removal-of-a-ventral-intermediate-nucleus-deep-brain-stimulator-lead-in-a-patient-with-essential-tremor-case-report
#11
Rosario Maugeri, Angelo Franzini, Antonella Giugno, Domenico Gerardo Iacopino
No abstract text is available yet for this article.
April 4, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28373927/non-invasive-brain-stimulation-for-essential-tremor
#12
REVIEW
Ludy C Shih, Alvaro Pascual-Leone
BACKGROUND: There is increasing interest in the use of non-invasive brain stimulation to characterize and potentially treat essential tremor (ET). Studies have used a variety of stimulation coils, paradigms, and target locations to make these observations. We reviewed the literature to compare prior studies and to evaluate the rationale and the methods used in these studies. METHODS: We performed a systematic literature search of the PubMed database using the terms "transcranial," "noninvasive," "brain stimulation," "transcranial magnetic stimulation (TMS)," "transcranial direct current stimulation (tDCS)," "transcranial alternating current stimulation (tACS)," and "essential tremor...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28373926/early-head-tremor-in-essential-tremor-a-case-series-and-commentary
#13
Elan D Louis, Funmi M Badejo, Ashley D Cristal, James Meyers, Nora Hernandez, Karen P Chen, Kelly V Naranjo, Jemin Park, Lorraine N Clark
BACKGROUND: Classically, the onset of head tremor in essential tremor (ET) patients follows that of hand tremor, such that there is a somatotopic spread of involved areas. Here we present a series of seven self-reportedly "unaffected" relatives of ET cases. These seven were clinically asymptomatic and had normal levels of arm tremor on examination, yet each evidenced a transient head wobble on examination. We estimate the prevalence of this phenotype within the two studies from which cases were ascertained...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28373925/high-voltage-vim-region-deep-brain-stimulation-mimicking-progressive-supranuclear-palsy
#14
Addie Patterson, Michael S Okun, Christopher Hess
BACKGROUND: Deep brain stimulation (DBS) for essential tremor (ET) can cause unwanted side effects. CASE REPORT: A patient with ET underwent unilateral dual-lead thalamic DBS. He later developed parkinsonism with atypical features and was diagnosed with progressive supranuclear palsy. During presentation for a second opinion, stimulation-induced side effects were suspected. Inactivation of DBS resolved atypical features and superimposed idiopathic Parkinson disease (PD) was diagnosed...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28373807/autosomal-dominant-cortical-tremor-myoclonus-and-epilepsy-syndrome-mimicking-juvenile-myoclonic-epilepsy
#15
Zeynep Aydin Özemir, Emel Oğuz Akarsu, Zeliha Matur, Ali Emre Öge, Betül Baykan
INTRODUCTION: Autosomal dominant cortical tremor, myoclonus, and epilepsy (ADCME) syndrome is a genetically heterogeneous and under-recognized disease characterized by tremulous movements mimicking essential tremor, myoclonus, and rare generalized tonic-clonic seizures. Here we described the clinical and electrophysiological features of three siblings with ADCME syndrome mimicking juvenile myoclonic epilepsy (JME). METHODS: Three siblings (two females and one male) diagnosed with ADCME were analyzed by electroencephalogram (EEG), somatosensory evoked potentials, and accelerometric recordings...
September 2016: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28371468/tremorolytic-effect-of-5-chloro-5-deoxy-%C3%A2-enba-a-potent-and-selective-adenosine-a1-receptor-agonist-evaluated-in-the-harmaline-induced-model-in-rats
#16
Barbara Kosmowska, Krystyna Ossowska, Urszula Głowacka, Jadwiga Wardas
AIM: The aim of this study was to examine the role of adenosine A1 receptors in the harmaline-induced tremor in rats using 5'-chloro-5'-deoxy-(±)-ENBA (5'Cl5'd-(±)-ENBA), a brain-penetrant, potent, and selective adenosine A1 receptor agonist. METHODS: Harmaline was injected at a dose of 15 mg/kg ip and tremor was measured automatically in force-plate actimeters by an increased averaged power in the frequency band of 9-15 Hz (AP2) and by tremor index (a difference in power between AP2 and averaged power in the frequency band of 0-8 Hz)...
May 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28370272/cost-effectiveness-of-focused-ultrasound-radiosurgery-and-dbs-for-essential-tremor
#17
Vinod K Ravikumar, Jonathon J Parker, Traci S Hornbeck, Veronica E Santini, Kim Butts Pauly, Max Wintermark, Pejman Ghanouni, Sherman C Stein, Casey H Halpern
BACKGROUND: Essential tremor remains a very common yet medically refractory condition. A recent phase 3 study demonstrated that magnetic resonance-guided focused ultrasound thalamotomy significantly improved upper limb tremor. The objectives of this study were to assess this novel therapy's cost-effectiveness compared with existing procedural options. METHODS: Literature searches of magnetic resonance-guided focused ultrasound thalamotomy, DBS, and stereotactic radiosurgery for essential tremor were performed...
April 3, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28368504/in-reply-thalamotomy-like-effects-from-partial-removal-of-a-ventral-intermediate-nucleus-deep-brain-stimulator-lead-in-a-patient-with-essential-tremor
#18
John D Rolston, Daniel A Lim
No abstract text is available yet for this article.
March 29, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28367776/mild-cognitive-impairment-subtypes-in-a-cohort-of-elderly-essential-tremor-cases
#19
Kathleen Collins, Brittany Rohl, Sarah Morgan, Edward D Huey, Elan D Louis, Stephanie Cosentino
OBJECTIVES: Individuals with essential tremor (ET) exhibit a range of cognitive deficits generally conceptualized as "dysexecutive" or "fronto-subcortical," and thought to reflect disrupted cortico-cerebellar networks. In light of emerging evidence that ET increases risk for Alzheimer's disease (AD), it is critical to more closely examine the nature of specific cognitive deficits in ET, with particular attention to amnestic deficits that may signal early AD. METHODS: We performed a cross-sectional analysis of baseline data from 128 ET cases (age 80...
April 3, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28366025/deep-brain-stimulation-of-the-ventralis-intermedius-nucleus-for-the-treatment-of-essential-tremor
#20
Alexander G Chartrain, Ahmed J Awad, Jonathan J Rasouli, Robert J Rothrock, Brian H Kopell
A 59-year-old woman with a 30-year history of essential tremor refractory to medical therapy underwent staged deep brain stimulation of the ventralis intermedius nucleus of the thalamus (VIM). Left-sided lead placement was performed first. Once in the operating room, microelectrode recording (MER) was performed to confirm the appropriate trajectory and identify the VIM border with the ventralis caudalis nucleus. MER was repeated after repositioning 2 mm anteriorly to reduce the likelihood of stimulation-induced paresthesias...
April 2017: Neurosurgical Focus
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