title: No brain structure abnormalities in boys with Tourette's syndrome: a voxel-based morphometry study.
abstract: Morphometric findings in Tourette's syndrome (TS) are still inconsistent probably due to differences in analysis approaches as well as several confounders (coexisting psychiatric conditions, medication status, etc.). Our aim was to identify possible morphometric changes in a well-defined sample of drug-naïve boys with "pure" TS. High-resolution structural magnetic resonance images of 38 boys with TS were compared with those of 38 healthy boys matched for age and IQ using voxel-based morphometry (VBM). Coexisting psychiatric conditions and previous medication were excluded. The inclusion of 10- to 15-year-old boys minimized the well known compensatory changes due to tic suppression over many years. VBM analyses revealed no differences between the treatment naïve boys with "pure" TS and healthy controls. Brain morphology is not altered in boys with "pure" TS. Further studies should reveal whether previous findings might be ascribed to confounding factors like coexisting psychiatric conditions or long-term compensatory mechanisms due to voluntary tic suppression.
authors.affiliation: Department of Child and Adolescent Psychiatry, University Medical Center, University of Dresden, Dresden, Germany. veit.roessner@uniklinikum-dresden.de
authors.forename: Veit
authors.initials: V
authors.lastname: Roessner
authors.forename: Sebastian
authors.initials: S
authors.lastname: Overlack
authors.forename: Juergen
authors.initials: J
authors.lastname: Baudewig
authors.forename: Peter
authors.initials: P
authors.lastname: Dechent
authors.forename: Aribert
authors.initials: A
authors.lastname: Rothenberger
authors.forename: Gunther
authors.initials: G
authors.lastname: Helms
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D001921:Brain / Q000473:pathology*; D001931:Brain Mapping; D002648:Child; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D005879:Tourette Syndrome / Q000473:pathology*