The top 100 cited articles in essential tremor

The Top 50 Most-Cited Articles in Orthostatic Tremor: A Bibliometric Review

Background

Article-level citation count is a hallmark indicating scientific impact. We aimed to pinpoint and evaluate the top 50 most-cited articles in orthostatic tremor (OT).

Methods

The ISI Web of Knowledge database and 2017 Journal Citation Report Science Edition were used to retrieve the 50 top-cited OT articles published from 1984 to April 2019. Information was collected by the Analyze Tool on the Web of Science, including number of citations, publication title, journal name, publication year, and country and institution of origin. Supplementary analyses were undertaken to clarify authorship, study design, level of evidence, and category.

Results

Up to 66% of manuscripts were recovered from five journals: Movement Disorders (n = 18), Brain (n = 4), Journal of Clinical Neurophysiology (n = 4), Neurology (n = 4), and Clinical Neurophysiology (n = 3). Articles were published between 1984 and 2018, with expert opinion as the predominant design (n = 22) and review as category (n = 17). Most articles had level 5 evidence (n = 26). According to their countries of origin, 34% of articles belonged to the United States (n = 17) leading the list, followed by United Kingdom (n = 15). University College London yielded the greater number of articles (n = 12), followed by the University of Kiel (n = 9). Most popular authors were G. Deuschl (n = 10), C.D. Marsden (n = 6), J. Jankovic (n = 5), P.D. Thompson (n = 5), J.C. Rothwell (n = 5), L.J. Findley (n = 4), and P. Brown (n = 4), who together accounted for 48% of them. All papers were in English.

Discussion

Publishing high-cited OT articles could be facilitated by source journal, study design, category, publication language, and country and institution of origin.

A bibliometric study of the movement disorder field by analyzing classic citation data on publication

Background: The extent to which a publication attracts scientific attention by virtue of its focus, provides clues about the trend and volume of scientific production in a particular field. Bibliometric analysis is a method to quantify aspects of a specific research area. This article focused on publication on the movement disorders. Methods: The bibliometric data on movement disorder were retrieved in relation to set of keywords from the Thomson Reuters Web of Science (WOS) available by January 2017. As many bibliometric statistics, such as citation indexes change during time, it was decided to compare two successive 5-years periods, 2007-2011 and 2012-2016. In addition, the citation classics publications with more than 100 times cited were taken into consideration. Results: In total, the number of movement disorder papers rose from 49,444 to 61,942. Clinical neurology was the most studied WOS subfield at 35.6%. About 12.0% of these studies were published by the Movement Disorders Journal. Original papers accounted for 63.7% of publications. The United States of America was the leading country as the source of these publications followed by China. University College London (UCL) was associated more than any other university regarding these publications whereas the National Institute of Health (NIH) was the major source of funding. The number of papers with more than 100 citations totaled 87, out of which only one paper had more than 400 citations. Conclusion: This study demonstrates that the total number of publications in movement disorders has increased remarkably during the past decade.

Linking Essential Tremor to the Cerebellum: Clinical Evidence

Essential tremor (ET) might be a family of diseases unified by the presence of kinetic tremor, but also showing etiological, pathological, and clinical heterogeneity. In this review, we will describe the most significant clinical evidence, which suggests that ET is linked to the cerebellum. Data for this review were identified by searching PUBMED (January 1966 to May 2015) crossing the terms "essential tremor" (ET) and "cerebellum," which yielded 201 entries, 11 of which included the term "cerebellum" in the article title. This was supplemented by articles in the author's files that pertained to this topic. The wide spectrum of clinical features of ET that suggest that it originates as a cerebellar or cerebellar outflow problem include the presence of intentional tremor, gait and balance abnormalities, subtle features of dysarthria, and oculomotor abnormalities, as well as deficits in eye-hand coordination, motor learning deficits, incoordination during spiral drawing task, abnormalities in motor timing and visual reaction time, impairment of social abilities, improvement in tremor after cerebellar stroke, efficacy of deep brain stimulation (which blocks cerebellar outflow), and cognitive dysfunction. It is unlikely, however, that cerebellar dysfunction, per se, fully explains ET-associated dementia, because the cognitive deficits that have been described in patients with cerebellar lesions are generally mild. Overall, a variety of clinical findings suggest that in at least a sizable proportion of patients with ET, there is an underlying abnormality of the cerebellum and/or its pathways.

Top cited articles in urology from Turkey

OBJECTIVE

Citation is the name given for a scientific publication in order to be used as a reference by another publication. In this study, we reviewed the most frequently cited publications in urology from Turkey. Although the number of citations is not completely definitive on its own, it shows the importance and effect of the publication. Besides the number of citations directly determines the impact factor of the journals and this factor is generally used in the evaluation of the quality and importance of the journal.

MATERIAL AND METHODS

On March 7-14, 2016, 51 studies with highest number of citations from Turkey are determined from Science Citation Index Expanded database index and the journals in which studies are published, the authors of the publications, their cities and departments, study types, publication date of the studies and the number of citations are recorded.

RESULTS

The most frequently encountered subjects in the publications that are mostly cited from Turkey are urolithiasis (23.5%), infertility (15.6%), benign prostatic hyperplasia (11.7%), sexual dysfunction (11.7%) and bladder carcinoma/urothelial carcinoma (9.8%). Distribution of 51 publications is as follows: 18 case series, 11 randomized study, 7 non-randomized study, 6 study, 3 review, 3 cross-sectional studies and 3 survey studies. Of all the studies, 68.6% are from Ankara, İstanbul and İzmir and 72.5% of them have originated from the university hospitals.

CONCLUSION

It is important to show the most cited Turkish publications in order to show the contribution in the world literature regarding to urology. The most cited publications in Turkey belong to urolithiasis and andrology areas. When the citation analysis publications in urology and different areas both in Turkey and in the world, it is observed that the number of our qualified publications is at acceptable levels.

The Most Cited Works in Essential Tremor and Dystonia

BACKGROUND

The study of the most cited works in a particular field gives an indication of the important advances, developments, and discoveries that have had the highest impact in that discipline. Our aim was to identify the most cited works in essential tremor (ET) and dystonia.

METHODS

A bibliometric search was performed using the ISI Web of Science database using selected search terms for ET and dystonia for articles published from 1900 to 2015. The resulting citation counts were analyzed to identify the most cited works, and the studies were categorized.

RESULTS

Using the criterion of more than 400 citations, there were four citation classics for ET and six for dystonia. The most cited studies were those on pathophysiology followed by medical treatments, clinical classification, genetic studies, surgical treatments, review articles, and epidemiology studies. A comparison of the most cited articles for ET and dystonia showed that there was a divergence, with ET and dystonia having a higher number of epidemiologic and genetic studies, respectively. Whereas the peak period for the number of publications was 2000-2004 for ET, it was 1995-1999 for dystonia.

DISCUSSION

Given the large number of patients with these disorders, there appears to be an unmet need for further research advances in both areas, but particularly for ET as the most common movement disorder.

Most cited articles in general surgery from Turkey

OBJECTIVE

The citation number of an article gives us information about its quality and contribution to science. In this article, we aimed to find the most frequently cited article in general surgery from Turkey, and evaluate how these articles in general surgery contributed to the world literature.

MATERIAL AND METHODS

We used the science citation index expanded database to find the most frequently cited articles in general surgery from Turkey.

RESULTS

Among the 52 articles found, the most common subjects were as follows: hydatid cyst (21.1%), pilonidal disease (15.4%), laparoscopic operations (15.4%), breast diseases (11.5%), and inguinal hernia (7.7%). Two articles were cited in more than 100 articles. Furthermore, 48.8% of the articles were published from three major cities. Most articles were published between 2000 and 2004, and 65.4% of articles were case series.

CONCLUSION

Most of the cited articles were about hydatid cyst and pilonidal disease, which are more common in the Turkish population compared with other countries. Evaluation of most cited articles is important to identify the fields in which Turkey contributes to the world literature.

Essential tremor: a neurodegenerative disease?

Background

Essential tremor (ET) is one of the most common neurological disorders among adults, and is the most common of the many tremor disorders. It has classically been viewed as a benign monosymptomatic condition, yet over the past decade, a growing body of evidence indicates that ET is a progressive condition that is clinically heterogeneous, as it may be associated with a spectrum of clinical features, with both motor and non-motor elements. In this review, I will describe the most significant emerging milestones in research which, when taken together, suggest that ET is a neurodegenerative condition.

Methods

A PubMed search conducted in June 2014 crossing the terms “essential tremor” (ET) and “neurodegenerative” yielded 122 entries, 20 of which included the term “neurodegenerative” in the article title. This was supplemented by articles in the author's files that pertained to this topic.

Results/Discussion

There is an open and active dialogue in the medical community as to whether ET is a neurodegenerative disease, with considerable evidence in favor of this. Specifically, ET is a progressive disorder of aging associated with neuronal loss (reduction in Purkinje cells) as well as other post-mortem changes that occur in traditional neurodegenerative disorders. Along with this, advanced neuroimaging techniques are now demonstrating distinct structural changes, several of which are consistent with neuronal loss, in patients with ET. However, further longitudinal clinical and neuroimaging longitudinal studies to assess progression are required.

Understanding essential tremor: progress on the biological front

For many years, little was written about the underlying biology of ET, despite its high prevalence. Discussions of disease mechanisms were dominated by a focus on tremor physiology. The traditional model of ET, the olivary model, was proposed in the 1970s. The model suffers from several critical problems, and its relevance to ET has been questioned. Recent mechanistic research has focused on the cerebellum. Clinical and neuroimaging studies strongly implicate the importance of this brain region in ET. Recent mechanistic research has been grounded more in tissue-based changes (i.e., postmortem studies of the brain). These studies have collectively and systematically identified a sizable number of changes in the ET cerebellum, and have led to a new model of ET, referred to as the cerebellar degenerative model. Hence, there is a renewed interest in the science behind the biology of ET. How the new understanding of ET will translate into treatment changes is an open question.