ABSTRACT
Objective:To explore the differences and similarities of the neuropsychological functioning defi-cits in children between Tourette syndrome (TS)and attention-deficit/hyperactivity disorder (ADHD). Methods:Thirty boys with TS-only,36 with TS-plus-ADHD,36 with ADHD were selected from out-patient department,and 50 normal boys (NC)matched with gender,age and IQ were recruited as the controls. Patients'diagnosis was made according to the International Statistical Classification of Diseases and Related Health Problems,Tenth Revision (ICD-10). They were assessed with the Stroop Color-Word Interference Test (Stroop)and Purdue Pegboard Test (Purdue)to evaluate the response inhibition and fine-motor coordination respectively. Results:The Stroop scores were higher in children with ADHD than in other groups (P0. 05 ). All Purdue scores were higher in children with disease than in normal children (P<0. 05 ). Conclusion:The results indicate that the response inhibition deficit may be found in children with ADHD,but not in those with TS-only and TS-plus-ADHD. The neural compensatory mechanism may be re-sponsible for the response inhibition function in children with TS whilst the fine-motor coordination deficit was as-sociated with the disease groups.