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https://www.readbyqxmd.com/read/28502600/the-puzzling-question-of-inhibitory-control-in-tourette-syndrome-a-meta-analysis
#1
REVIEW
Simon Morand-Beaulieu, Stéphanie Grot, Jacob Lavoie, Julie B Leclerc, David Luck, Marc E Lavoie
Tourette syndrome (TS) is a neuropsychiatric disorder involving motor and phonic tics. Inhibitory control is a key issue in TS, and many disruptive or impulsive behaviors might arise from inhibitory deficits. However, conflicting findings regarding TS patients' inhibitory performance in neuropsychological tasks have been reported throughout the literature. Therefore, this meta-analysis aimed to evaluate inhibitory control through neuropsychological tasks, and to analyze the factors modulating inhibitory deficits...
May 11, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28483714/purposeless-oral-activity-induced-by-meta-chlorophenylpiperazine-m-cpp-undefined-tic-like-behaviors
#2
Deborah S Kreiss, Philippe De Deurwaerdère
BACKGROUND: The pathophysiological hypothesis underlying tic disorders in Tourette syndrome (TS) is that basal ganglia are not capable of properly filtering cortical information, leading patients with difficulties in inhibiting unwanted behaviors or impulses. One of the main challenges for furthering such a hypothesis is to find appropriate animal models summarizing some aspects of the disease. METHODS: It has been established for more than 25 years in rodents that the prototypical serotonin (5-HT) agonist meta-chlorophenylpiperazine (m-CPP) elicits purposeless oral movements including chewing behavior...
May 5, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28472652/de-novo-coding-variants-are-strongly-associated-with-tourette-disorder
#3
A Jeremy Willsey, Thomas V Fernandez, Dongmei Yu, Robert A King, Andrea Dietrich, Jinchuan Xing, Stephan J Sanders, Jeffrey D Mandell, Alden Y Huang, Petra Richer, Louw Smith, Shan Dong, Kaitlin E Samocha, Benjamin M Neale, Giovanni Coppola, Carol A Mathews, Jay A Tischfield, Jeremiah M Scharf, Matthew W State, Gary A Heiman
Whole-exome sequencing (WES) and de novo variant detection have proven a powerful approach to gene discovery in complex neurodevelopmental disorders. We have completed WES of 325 Tourette disorder trios from the Tourette International Collaborative Genetics cohort and a replication sample of 186 trios from the Tourette Syndrome Association International Consortium on Genetics (511 total). We observe strong and consistent evidence for the contribution of de novo likely gene-disrupting (LGD) variants (rate ratio [RR] 2...
May 3, 2017: Neuron
https://www.readbyqxmd.com/read/28470381/relationship-of-serum-ferritin-level-and-tic-severity-in-children-with-tourette-syndrome
#4
Debabrata Ghosh, Elizabeth Burkman
PURPOSE: Tics can be considered hyperkinetic movements akin to restless leg syndrome (RLS). Drawing the analogy of iron deficiency as an etiology of RLS, it is conceivable that iron deficiency may underlie or worsen tics in Tourette syndrome (TS). The purpose of this study was to evaluate the relationship between serum ferritin levels and tic severity, as well as consequent impact on life, in children with TS. METHODS: Children <18 years, diagnosed with TS during 2009-2015, were reviewed...
May 3, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28464701/preliminary-evidence-on-cannabis-effectiveness-and-tolerability-for-adults-with-tourette-syndrome
#5
Elia Abi-Jaoude, Lei Chen, Patrina Cheung, Tracy Bhikram, Paul Sandor
The authors retrospectively evaluated effectiveness and tolerability of cannabis in 19 adults with Tourette syndrome. Tics scores decreased by 60%, and 18 of the 19 participants were at least "much improved." Cannabis was generally well tolerated, although most participants reported side effects.
May 3, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28451624/tics-in-the-pediatric-population-pragmatic-management
#6
REVIEW
Christos Ganos, Davide Martino, Tamara Pringsheim
BACKGROUND: Primary tic disorders, notably Tourette syndrome, are very common movement disorders in childhood. However, the management of such patients still poses great therapeutic challenges to medical professionals. METHODS: Based on a synthesis of the available guidelines published in Europe, Canada, and the United States, coupled with more recent therapeutic developments, the authors provide a pragmatic guide to aid clinicians in deciding when and how to treat patients who have primary tic disorders...
March 2017: Movement Disorders Clinical Practice
https://www.readbyqxmd.com/read/28445405/significant-tic-reduction-in-an-otherwise-treatment-resistant-patient-with-gilles-de-la-tourette-syndrome-following-treatment-with-nabiximols
#7
Ahmad Seif Kanaan, Ewgeni Jakubovski, Kirsten Müller-Vahl
Early anecdotal reports and preliminary studies suggested that cannabinoid-based medicines such as delta-9-tetrahydrocannabinol (THC) are effective in the treatment of Gilles de la Tourette syndrome (TS). We report a single case study of a patient with otherwise treatment-resistant TS successfully treated with nabiximols. Our patient was a 22-year-old male suffering from severe and complex TS. Treatment with nabiximols was commenced at a dose of 1 puff/day (= 100 μL containing 2.7 mg THC and 2.5 mg cannabidiol (CBD)) and slowly increased up to a dosage of 3 × 3 puffs/day (= 24...
April 26, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28429606/parent-and-patient-perceptions-of-functional-impairment-due-to-tourette-syndrome-development-of-a-shortened-version-of-the-child-tourette-syndrome-impairment-scale
#8
Kara S Francis Barfell, Ryan R Snyder, Kelly M Isaacs-Cloes, Jordan F Garris, Alyssa R Roeckner, Paul S Horn, Michael D Guthrie, Steve W Wu, Donald L Gilbert
The Child Tourette Syndrome Impairment Scale (CTIM) rates 37 problems in school, social, and home domains separately for tics and for comorbid diagnoses. However, a shorter version would be easier to implement in busy clinics. Using published data from 85 children with Tourette syndrome, 92 controls, and parents, factor analysis was used to generate a "mini-CTIM" composed of 12 items applied to tic and comorbid diagnoses. Child- and parent-rated mini-CTIM scores were compared and correlated across raters and accounting for clinician-rated tic severity and presence of attention-deficit hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD)...
January 1, 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28418483/tics-and-tourette-syndrome
#9
Christopher C Muth
No abstract text is available yet for this article.
April 18, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28387621/deep-brain-stimulation-for-tourette-syndrome-a-single-center-series
#10
Richard S Dowd, Michael Pourfar, Alon Y Mogilner
OBJECTIVE Tourette syndrome (TS) is a complex neuropsychiatric disorder characterized by multiple motor and phonic tics. While pharmacological and behavioral therapy can be effective in most patients, a subset of patients remains refractory to treatment. Increasing clinical evidence from multiple centers suggests that deep brain stimulation (DBS) of the medial thalamus can be effective in many cases of refractory TS. METHODS The authors retrospectively reviewed outcomes in 13 patients with refractory TS who underwent medial thalamic DBS performed by their team over a 7-year period...
April 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28387387/deutetrabenazine-treatment-of-hyperkinetic-aspects-of-huntington-s-disease-tardive-dyskinesia-and-tourette-syndrome
#11
D M Paton
Deutetrabenazine is a derivative of tetrabenazine in which two trideuteromethoxy groups substitute two methoxy groups. The active metabolites of deutetrabenazine have a longer half-life than those of tetrabenazine, together with a greater overall absorption. However, the peak plasma concentrations are lower. Because of these pharmacokinetic differences, deutetrabenazine can be given twice daily, thus improving compliance. The lower peak concentrations may account for a lower incidence of some unwanted adverse effects...
February 2017: Drugs of Today
https://www.readbyqxmd.com/read/28358814/dysfunctions-of-the-basal-ganglia-cerebellar-thalamo-cortical-system-produce-motor-tics-in-tourette-syndrome
#12
Daniele Caligiore, Francesco Mannella, Michael A Arbib, Gianluca Baldassarre
Motor tics are a cardinal feature of Tourette syndrome and are traditionally associated with an excess of striatal dopamine in the basal ganglia. Recent evidence increasingly supports a more articulated view where cerebellum and cortex, working closely in concert with basal ganglia, are also involved in tic production. Building on such evidence, this article proposes a computational model of the basal ganglia-cerebellar-thalamo-cortical system to study how motor tics are generated in Tourette syndrome. In particular, the model: (i) reproduces the main results of recent experiments about the involvement of the basal ganglia-cerebellar-thalamo-cortical system in tic generation; (ii) suggests an explanation of the system-level mechanisms underlying motor tic production: in this respect, the model predicts that the interplay between dopaminergic signal and cortical activity contributes to triggering the tic event and that the recently discovered basal ganglia-cerebellar anatomical pathway may support the involvement of the cerebellum in tic production; (iii) furnishes predictions on the amount of tics generated when striatal dopamine increases and when the cortex is externally stimulated...
March 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28348386/perinatal-risk-factors-in-tourette-s-and-chronic-tic-disorders-a-total-population-sibling-comparison-study
#13
G Brander, M Rydell, R Kuja-Halkola, L Fernández de la Cruz, P Lichtenstein, E Serlachius, C Rück, C Almqvist, B M D'Onofrio, H Larsson, D Mataix-Cols
Adverse perinatal events may increase the risk of Tourette's and chronic tic disorders (TD/CTD), but previous studies have been unable to control for unmeasured environmental and genetic confounding. We aimed to prospectively investigate potential perinatal risk factors for TD/CTD, taking unmeasured factors shared between full siblings into account. A population-based birth cohort, consisting of all singletons born in Sweden in 1973-2003, was followed until December 2013. A total of 3 026 861 individuals were identified, 5597 of which had a registered TD/CTD diagnosis...
March 28, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28339122/mortality-risk-in-a-nationwide-cohort-of-individuals-with-tic-disorders-and-with-tourette-syndrome
#14
Sandra M Meier, Søren Dalsgaard, Preben B Mortensen, James F Leckman, Kerstin J Plessen
BACKGROUND: Few studies have investigated mortality risk in individuals with tic disorders. METHODS: We thus measured the risk of premature death in individuals with tic disorders and with Tourette syndrome in a prospective cohort study with 80 million person-years of follow-up. We estimated mortality rate ratios and adjusted for calendar year, age, sex, urbanicity, maternal and paternal age, and psychiatric disorders to compare individuals with and without tic disorders...
April 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28335874/course-of-tourette-syndrome-and-comorbidities-in-a-large-prospective-clinical-study
#15
Camilla Groth, Nanette Mol Debes, Charlotte Ulrikka Rask, Theis Lange, Liselotte Skov
OBJECTIVE: Tourette syndrome (TS) is a childhood-onset neurodevelopmental disorder characterized by tics and frequent comorbidities. Although tics often improve during adolescence, recent studies suggest that comorbid obsessive-compulsive disorder (OCD) and attention-deficit/hyperactivity disorder (ADHD) tend to persist. This large prospective follow-up study describes the clinical course of tics and comorbidities during adolescence and the prevalence of coexisting psychopathologies. METHOD: The clinical cohort was recruited at the Danish National Tourette Clinic, and data were collected at baseline (n = 314, age range 5-19 years) and at follow-up 6 years later (n = 227) to establish the persistence and severity of tics and comorbidities...
April 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28335873/parental-psychopathology-and-tourette-syndrome-chronic-tic-disorder-in-offspring-a-nationwide-case-control-study
#16
Susanna Leivonen, Jeremiah M Scharf, Carol A Mathews, Roshan Chudal, David Gyllenberg, Dan Sucksdorff, Auli Suominen, Arja Voutilainen, Alan S Brown, Andre Sourander
OBJECTIVE: To determine the associations between maternal and paternal psychiatric diagnoses and Tourette syndrome (TS)/chronic tic disorder (CT) in a nationwide study. METHOD: This nested case-control study linked data derived from three national registers. All singletons born and diagnosed with TS/CT in Finland between January 1991 and December 2010 were identified (n = 1,120) and matched to four controls (n = 4,299). Conditional logistic regression was used to examine the associations between parental psychopathology and TS/CT...
April 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28335870/persistent-tics-tourette-syndrome-and-psychopathology-where-are-we-now-and-where-are-we-going
#17
EDITORIAL
Barbara J Coffey
No abstract text is available yet for this article.
April 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28331502/a-qualitative-exploration-of-the-experiences-of-children-and-adolescents-with-tourette-syndrome
#18
Kim R Edwards, Sandra Mendlowitz, Elana Jackson, Claire Champigny, Matt Specht, Paul Arnold, Daniel Gorman, Gina Dimitropoulos
OBJECTIVE: The purpose of this qualitative study was to explore the experiences of youth with Tourette Syndrome (TS). METHOD: Thirteen participants with TS were recruited from a large tertiary care hospital to complete semi-structured interviews and two questionnaires pertaining to demographic information and tic severity. Thematic analysis was utilized to systematically analyze the data. RESULTS: Three main themes were identified: 1) beliefs about TS; 2) TS related distress and impairment; and, 3) coping with TS...
2017: Journal of the Canadian Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28289952/tic-severity-and-treatment-in-children-the-effect-of-comorbid-attention-deficit-hyperactivity-disorder-and-obsessive-compulsive-behaviors
#19
Tamara Pringsheim
While attention deficit hyperactivity disorder (ADHD) and obsessive compulsive disorder have been shown to have major impacts on quality of life in individuals with Tourette syndrome, there is comparatively little data on how the presence of these comorbidities influence tic severity and treatment. 114 children (mean age 10.25 years) were extensively clinically phenotyped at a single specialty clinic. While there was no difference in Yale Global Tic Severity Scale (YGTSS) scores in children with versus without ADHD, children with obsessive compulsive behaviors had significantly higher YGTSS scores (p = 0...
March 13, 2017: Child Psychiatry and Human Development
https://www.readbyqxmd.com/read/28289551/tic-exacerbation-in-adults-with-tourette-syndrome-a-case-series
#20
Sara M Schaefer, Christopher A Chow, Elan D Louis, Daphne Robakis
BACKGROUND: Tourette syndrome (TS) has been described as peaking in adolescence with subsequent regression. We report patients who were diagnosed with TS during childhood who experienced a latent period (significant reduction in or absence of tics) followed by tic re-emergence in adulthood. METHODS: We performed a retrospective chart review of outpatients over age 21 seen at the Yale neurology clinic between January 2012 and July 2016 who were diagnosed with childhood-onset tics, and who experienced a latent period of greater than 1 year followed by an exacerbation...
2017: Tremor and Other Hyperkinetic Movements
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