title: Eye-hand preference dissociation in obsessive-compulsive disorder and dyslexia.
abstract: Dyslexia may be a development disturbance in which there are alterations in visual-spatial and visual-motor processing, while obsessive-compulsive disorder (OCD) is a psychiatric disease in which there are alterations in memory, executive function, and visual-spatial processing. Our hypothesis is that these disturbances may be, at least partially, the result of a crossed eye and hand preference. In the present study 16 controls, 20 OCD (DSM-IV criteria) and 13 dyslexic adults (Brazilian Dyslexia Association criteria) were included. All had a neurological examination, the Yale-Brown scale for obsessive-compulsive symptoms application and the Zazzó evaluation for laterality, abridged by Granjon. Results showed a right hand preference for 100% of controls, 84.6% of dyslexics, and 75% of OCD patients and a right eye preference for 73.3% of controls, 69.2% of dyslexics, and 35% of OCD patients. The left eye preference was significantly higher in OCD when compared with the two other groups (p = 0.01) and the left hand preference of OCD patients (25%) was also significant when compared to Brazilian population (4%) or British population (4.5%). It is possible that this crossed preference may be partially the reason for visual-spatial and constructive disturbances observed in OCD.
authors.affiliation: Department of Neurology and Neurosurgery, School of Medicine, Federal University of São Paulo, São Paulo, SP, Brazil. yvens@uol.com.br
authors.forename: Marilena Occhini
authors.initials: MO
authors.lastname: Siviero
authors.forename: Eliana Oliveira
authors.initials: EO
authors.lastname: Rysovas
authors.forename: Yara
authors.initials: Y
authors.lastname: Juliano
authors.forename: José Alberto
authors.initials: JA
authors.lastname: Del Porto
authors.forename: Paulo Henrique Ferreira
authors.initials: PH
authors.lastname: Bertolucci
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D004410:Dyslexia / Q000523:psychology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009771:Obsessive-Compulsive Disorder / Q000523:psychology*; D011569:Psychiatric Status Rating Scales; D014796:Visual Perception