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Despite the overt nature of most motor and phonic tic phenomena, the development of valid and reliable scales to rate tic severity has been an elusive goal. The Yale Global Tic Severity Scale (YGTSS) is a new clinical rating instrument that was designed for use in studies of Tourette's syndrome and other tic disorders. The YGTSS provides an evaluation of(More)
OBJECTIVE To evaluate the reliability and validity of a semistructured measure of obsessive-compulsive symptom severity in children and adolescents with obsessive-compulsive disorder (OCD). METHOD Sixty-five children with OCD (25 girls and 40 boys, aged 8 to 17 years) were assessed with the Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS).(More)
Tourette's syndrome (TS) is a genetically influenced developmental neuropsychiatric disorder characterized by chronic vocal and motor tics. We studied Slit and Trk-like 1 (SLITRK1) as a candidate gene on chromosome 13q31.1 because of its proximity to a de novo chromosomal inversion in a child with TS. Among 174 unrelated probands, we identified a frameshift(More)
OBJECTIVE This study evaluated the efficacy and safety of guanfacine in treating children with tic disorders and attention deficit hyperactivity disorder (ADHD). METHOD Subjects from a specialty tic disorders clinic were randomly assigned to receive 8 weeks of treatment with guanfacine or placebo under double-blind conditions. Follow-up visits occurred(More)
OBJECTIVE Obsessive-compulsive disorder encompasses a broad range of symptoms that represent multiple psychological domains, including perception, cognition, emotion, social relatedness, and diverse motor behaviors. The purpose of these analyses was to evaluate the correlational relationships of the symptoms of obsessive-compulsive disorder. METHOD This(More)
This study focuses on early parental preoccupations and behaviors (EPPB) surrounding the birth of a new family member. An interview instrument was developed to assess EPPB at eight months prepartum and two weeks and three months postpartum. Measures with adequate psychometric and conceptual properties were used to assess the overall level of parental(More)
BACKGROUND Despite strong circumstantial evidence that the pathophysiology of Gilles de la Tourette syndrome (TS) involves structural and functional disturbances of the basal ganglia, inconsistent findings from relatively small in vivo TS imaging studies have supported contradictory conclusions concerning the role of abnormal anatomical characteristics of(More)
Tic symptoms, the hallmark of Tourette's syndrome (TS), may simply be fragments of innate behavior. As such, the sensory urges that precede tics may illuminate some of the normal internal cues that are intimately involved in the assembly of behavioral sequences. The occurrence of tics in time appears to have fractal characteristics that may help to explain(More)
OBJECTIVE Obsessive-compulsive disorder (OCD) is a clinically heterogeneous condition. This heterogeneity can reduce the power and obscure the findings from natural history studies to genome scans, neuroimaging, and clinical trials. The authors review the evidence supporting a multidimensional model of OCD. METHOD Computerized and manual literature(More)