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Movement disorders

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https://www.readbyqxmd.com/read/28434057/predictive-control-of-intersegmental-tarsal-movements-in-an-insect
#1
Alicia Costalago-Meruelo, David M Simpson, Sandor M Veres, Philip L Newland
In many animals intersegmental reflexes are important for postural and movement control but are still poorly undesrtood. Mathematical methods can be used to model the responses to stimulation, and thus go beyond a simple description of responses to specific inputs. Here we analyse an intersegmental reflex of the foot (tarsus) of the locust hind leg, which raises the tarsus when the tibia is flexed and depresses it when the tibia is extended. A novel method is described to measure and quantify the intersegmental responses of the tarsus to a stimulus to the femoro-tibial chordotonal organ...
April 22, 2017: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/28434004/what-do-medical-students-know-about-deep-brain-stimulation
#2
Andreas Wloch, Assel Saryyeva, Hans E Heissler, Christoph Schrader, H Holger Capelle, Joachim K Krauss
BACKGROUND: Deep brain stimulation (DBS) is an established therapy for movement disorders. It is currently under investigation in neuropsychiatric disorders. Neurophobia is a common phenomenon that might have a negative impact in medical education. Little is known about medical students' knowledge about DBS when they enter university and what they learn about it during their medical formation. METHODS: A 10-item questionnaire was designed. Questions addressed indications for DBS, costs of DBS, complications, the percentage of Parkinson disease (PD) patients who might profit from DBS, etc...
April 22, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28433987/radiofrequency-lesions-through-deep-brain-stimulation-electrodes-in-movement-disorders-case-report-and-review-of-the-literature
#3
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/28433867/validity-and-repeatability-of-inertial-measurement-units-for-measuring-gait-parameters
#4
Edward P Washabaugh, Tarun Kalyanaraman, Peter G Adamczyk, Edward S Claflin, Chandramouli Krishnan
Inertial measurement units (IMUs) are small wearable sensors that have tremendous potential to be applied to clinical gait analysis. They allow objective evaluation of gait and movement disorders outside the clinic and research laboratory, and permit evaluation on large numbers of steps. However, repeatability and validity data of these systems are sparse for gait metrics. The purpose of this study was to determine the validity and between-day repeatability of spatiotemporal metrics (gait speed, stance percent, swing percent, gait cycle time, stride length, cadence, and step duration) as measured with the APDM Opal IMUs and Mobility Lab system...
April 12, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28433741/loss-of-the-neurodevelopmental-gene-zswim6-alters-striatal-morphology-and-motor-regulation
#5
David J Tischfield, Dave K Saraswat, Andrew Furash, Stephen C Fowler, Marc V Fuccillo, Stewart A Anderson
The zinc-finger SWIM domain-containing protein 6 (ZSWIM6) is a protein of unknown function that has been associated with schizophrenia and limited educational attainment by three independent genome-wide association studies. Additionally, a putatively causal point mutation in ZSWIM6 has been identified in several cases of acromelic frontonasal dysostosis with severe intellectual disability. Despite the growing number of studies implicating ZSWIM6 as an important regulator of brain development, its role in this process has never been examined...
April 19, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28433109/pathogenesis-of-wilson-disease
#6
Ivo Florin Scheiber, Radan Brůha, Petr Dušek
Wilson disease is an autosomal-recessive disorder originating from a genetic defect in the copper-transporting ATPase ATP7B that is required for biliary copper secretion and loading of ceruloplasmin with copper. Impaired ATP7B function in Wilson disease results in excessive accumulation of copper in liver, brain, and other tissues. Toxic copper deposits may induce oxidative stress, modify expression of genes, directly inhibit proteins, and impair mitochondrial function, leading to hepatic, neuropsychiatric, renal, musculoskeletal, and other symptoms...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28432771/a-rare-variant-in-tor1a-exon-5-associated-with-isolated-dystonia-in-southwestern-chinese
#7
Yuzhou Long, Yang Chen, Yuan Qian, Jianlin Wang, Lihua Luo, Xiaoqin Huang, Li Li, Jiayou Chu, Zhaoqing Yang, Hao Sun
BACKGROUND: TOR1A has been proposed as an important genetic factor in early-onset isolated dystonia. Variants located in the 3' untranslated region of TOR1A are of particular importance because they may influence gene expression, although related studies are limited. The objectives of the present study focused on variants in the TOR1A 3' untranslated region. METHODS: The last exon of TOR1A was sequenced in 229 cases with isolated dystonia and in 210 controls. In addition, 471 controls were tested to determine the frequency of the variants in the 3' untranslated region...
April 22, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28432451/investigating-the-use-of-world-knowledge-during-on-line-comprehension-in-adults-with-autism-spectrum-disorder
#8
Philippa L Howard, Simon P Liversedge, Valerie Benson
The on-line use of world knowledge during reading was examined in adults with autism spectrum disorder (ASD). Both ASD and typically developed adults read sentences that included plausible, implausible and anomalous thematic relations, as their eye movements were monitored. No group differences in the speed of detection of the anomalous violations were found, but the ASD group showed a delay in detection of implausible thematic relations. These findings suggest that there are subtle differences in the speed of world knowledge processing during reading in ASD...
April 21, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28431829/utility-of-the-new-movement-disorder-society-clinical-diagnostic-criteria-for-parkinson-s-disease-applied-retrospectively-in-a-large-cohort-study-of-recent-onset-cases
#9
Naveed Malek, Michael A Lawton, Katherine A Grosset, Nin Bajaj, Roger A Barker, Yoav Ben-Shlomo, David J Burn, Tom Foltynie, John Hardy, Huw R Morris, Nigel M Williams, Nicholas Wood, Donald G Grosset
OBJECTIVE: To examine the utility of the new Movement Disorder Society (MDS) diagnostic criteria in a large cohort of Parkinson's disease (PD) patients. METHODS: Recently diagnosed (<3.5 years) PD cases fulfilling United Kingdom (UK) brain bank criteria in Tracking Parkinson's, a UK multicenter prospective natural history study were assessed by retrospective application of the MDS criteria. RESULTS: In 2000 cases, 1835 (91.7%) met MDS criteria for PD, either clinically established (n = 1261, 63...
April 12, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28431177/altered-functional-connectivity-in-idiopathic-rapid-eye-movement-sleep-behavior-disorder-a-resting-state-eeg-study
#10
Jun-Sang Sunwoo, Sanghun Lee, Jung-Hoon Kim, Jung-Ah Lim, Tae-Joon Kim, Jung-Ick Byun, Min Hee Jeong, Kwang Su Cha, Jeong Woo Choi, Kyung Hwan Kim, Soon-Tae Lee, Keun-Hwa Jung, Kyung-Il Park, Kon Chu, Manho Kim, Sang Kun Lee, Ki-Young Jung
Study Objectives: Idiopathic rapid eye movement sleep behavior disorder (iRBD) is considered as a prodromal stage of synucleinopathy. Although loss of functional connectivity is implicated in neurodegenerative diseases, network characteristics of electroencephalography (EEG) in iRBD are unknown. Therefore, we evaluated resting-state EEG functional connectivity to identify the brain network changes in patients with iRBD. Methods: We prospectively enrolled 20 patients with polysomnography-confirmed iRBD and 16 control subjects...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28430839/pathological-imitative-behavior-and-response-preparation-in-schizophrenia
#11
Denisas Dankinas, Sigita Melynyte, Aldona Siurkute, Kastytis Dapsys
Introduction: Pathological imitative behavior (ehopraxia) is occasionally observed in schizophrenia patients. However, only a severe form of echopraxia can be detected with the help of a direct observation. Therefore, our goal was to study a latent form of pathological imitative behavior in this disorder, which is indicated by an increase of imitative tendencies. Method: In our study, 14 schizophrenia patients and 15 healthy subjects were employed in two tasks: (a) in an imitative task they had to copy a hand action seen on a screen; (b) in a counter-imitative task they had to make a different movement (which involves an inhibition of prepotent imitative tendency that is impaired in case of pathological imitative behavior)...
April 20, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28429825/validation-of-the-mds-research-criteria-for-prodromal-parkinson-s-disease-longitudinal-assessment-in-a-rem-sleep-behavior-disorder-rbd-cohort
#12
Seyed-Mohammad Fereshtehnejad, Jacques Y Montplaisir, Amelie Pelletier, Jean-François Gagnon, Daniela Berg, Ronald B Postuma
BACKGROUND: Recently, the International Parkinson and Movement Disorder Society introduced the prodromal criteria for PD. Objectives Our study aimed to examine diagnostic accuracy of the criteria as well as the independence of prodromal markers to predict conversion to PD or dementia with Lewy bodies. METHODS: This prospective cohort study was performed on 121 individuals with rapid eye movement sleep behavior disorder who were followed annually for 1 to 12 years...
April 21, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28429747/imaging-genetics-approach-to-parkinson-s-disease-and-its-correlation-with-clinical-score
#13
Mansu Kim, Jonghoon Kim, Seung-Hak Lee, Hyunjin Park
Parkinson's disease (PD) is a progressive neurodegenerative disorder associated with both underlying genetic factors and neuroimaging findings. Existing neuroimaging studies related to the genome in PD have mostly focused on certain candidate genes. The aim of our study was to construct a linear regression model using both genetic and neuroimaging features to better predict clinical scores compared to conventional approaches. We obtained neuroimaging and DNA genotyping data from a research database. Connectivity analysis was applied to identify neuroimaging features that could differentiate between healthy control (HC) and PD groups...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428907/palliative-care-in-huntington-disease-personal-reflections-and-a-review-of-the-literature
#14
REVIEW
Christopher G Tarolli, Amy M Chesire, Kevin M Biglan
BACKGROUND: Huntington disease is a fatal, autosomal dominant, neurodegenerative disorder manifest by the triad of a movement disorder, behavioral disturbances, and dementia. At present, no curative or disease modifying therapies exist for the condition and current treatments are symptomatic. Palliative care is an approach to care that focuses on symptom relief, patient and caregiver support, and end of life care. There is increasing evidence of the benefit of palliative care throughout the course of neurodegenerative conditions including Parkinson disease and amyotrophic lateral sclerosis...
2017: Tremor and Other Hyperkinetic Movements
https://www.readbyqxmd.com/read/28427400/monitoring-mandibular-movements-to-detect-cheyne-stokes-breathing
#15
Jean-Benoît Martinot, Jean-Christian Borel, Nhat-Nam Le-Dong, Hervé Jean-Pierre Guénard, Valerie Cuthbert, Philip E Silkoff, David Gozal, Jean-Louis Pepin
BACKGROUND: The patterns of mandibular movements (MM) during sleep can be used to identify increased respiratory effort periodic large-amplitude MM (LPM), and cortical arousals associated with "sharp" large-amplitude MM (SPM). We hypothesized that Cheyne Stokes breathing (CSB) may be identified by periodic abnormal MM patterns. The present study aims to evaluate prospectively the concordance between CSB detected by periodic MM and polysomnography (PSG) as gold-standard. The present study aims to evaluate prospectively the concordance between CSB detected by periodic MM and polysomnography (PSG) as gold-standard...
April 20, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28427388/movement-cognition-and-narration-of-the-emotions-treatment-versus-standard-speech-therapy-in-the-treatment-of-children-with-borderline-intellectual-functioning-a-randomized-controlled-trial
#16
V Blasi, G Baglio, F Baglio, M P Canevini, M Zanette
BACKGROUND: Borderline intellectual functioning (BIF) is defined as a "health meta-condition… characterized by various cognitive dysfunctions associated with an intellectual quotient (IQ) between 71 and 85 which determines a deficit in the individual's functioning both in the restriction of activities and in the limitation of social participation". It can be caused by many factors, including a disadvantaged background and prematurity. BIF affects 7-12% of primary school children that show academic difficulties due to poor executive functioning...
April 20, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28427022/stereotypy-of-psychogenic-nonepileptic-seizures
#17
Moshe Herskovitz
Psychogenic nonepileptic seizures (PNES) are defined as paroxysmal episodes in which epileptic semiology features are manifested, without the characteristic concomitant electrical discharges seen in epileptic seizures. Although many studies have dealt with semiologic classification of PNES, most of the studies did not raise the question of consistency of PNES in the same patient. The aim of this study was to measure the degree of consistency of PNES among individual patients. We retrospectively reviewed medical records and video- EEG records of all adult patients who underwent monitoring in our center from August 1st 2013 to May 31st 2015...
April 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28425489/meis1-variant-as-a-determinant-of-autonomic-imbalance-in-restless-legs-syndrome
#18
Jérôme Thireau, Charlotte Farah, Nicolas Molinari, Fabrice Bouilloux, Lucas Torreilles, Juliane Winkelmann, Sabine Scholz, Sylvain Richard, Yves Dauvilliers, Frédéric Marmigère
Restless Legs Syndrome (RLS) is a genetically complex neurological disorder in which overlapping genetic risk factors may contribute to the diversity and heterogeneity of the symptoms. The main goal of the study was to investigate, through analysis of heart rate variability (HRV), whether in RLS patients the MEIS1 polymorphism at risk influences the sympathovagal regulation in different sleep stages. Sixty-four RLS patients with periodic leg movement index above 15 per hour, and 38 controls underwent one night of video-polysomnographic recording...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28425095/psychomotor-tremor-and-proprioceptive-control-problems-in-current-and-former-stimulant-drug-users-an-accelerometer-study-of-heavy-users-of-amphetamine-mdma-and-other-recreational-stimulants
#19
Luke A Downey, Brenda Tysse, Talitha C Ford, Angela C Samuels, Rory P Wilson, Andrew C Parrott
The recreational use of various stimulant drugs has been implicated in the development of movement disorders through dysregulation of the dopaminergic and serotoninergic neurotransmitter systems. The present study investigated psychomotor differences in current and former recreational stimulant drug users compared with nonusing controls. Sixty participants comprised 3 groups: 20 current stimulant drug users (CSUs; 11 men, aged 31.4 ± 9.1 years), 20 former stimulant drug users (FSUs; 5 men, aged 39.1 ± 8.5 years), and 20 nonuser controls (NUCs; 5 men, aged 35...
April 19, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28424977/restless-legs-syndrome-and-tension-type-headache-a-population-based-study
#20
Pil-Wook Chung, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, Min Kyung Chu
BACKGROUND: Recent studies have shown a significant association between restless legs syndrome (RLS) and primary headache disorders. Nevertheless, information regarding the association between tension-type headache (TTH) and RLS is limited. This study aimed to investigate the association between RLS and TTH in a population-based sample. METHODS: We selected a stratified random population sample of Koreans aged 19-69 years and assessed them using a semi-structured interview designed to identify RLS, headache type, and clinical characteristics of TTH...
December 2017: Journal of Headache and Pain
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