Journal of attention disorders · 2013
Response Inhibition in Tic Disorders: Waiting to Respond Is Harder When ADHD Is Present.
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Thibeault Marc, Lemay Martin, Chouinard Sylvain, Lespérance Paul, Rouleau Guy A, Richer Francois
Аннотация
OBJECTIVE: Tic disorders such as Gilles-de-la-Tourette syndrome (TS) are associated with difficulties in withholding movements and sometimes inappropriate actions. The present study examined whether these disorders lead to a specific difficulty in withholding preprogrammed voluntary movements irrespective of decisions on whether or not to move.
METHOD: Children with TS with or without attention-deficit hyperactivity disorder (ADHD) and controls performed a fast-paced simple reaction time task involving responses to a target in a rapid letter stream (9 letters/s, average foreperiod 332 ms) with feedback on response speed.
RESULTS: The ADHD group showed more premature responses and more variable response time than other groups, whether the timing of the target was predictable or not.
CONCLUSION: The data indicate that in tic disorders, the presence of ADHD is associated with difficulties in waiting to initiate preprogrammed movements independently of response selection or response timing difficulties.
METHOD: Children with TS with or without attention-deficit hyperactivity disorder (ADHD) and controls performed a fast-paced simple reaction time task involving responses to a target in a rapid letter stream (9 letters/s, average foreperiod 332 ms) with feedback on response speed.
RESULTS: The ADHD group showed more premature responses and more variable response time than other groups, whether the timing of the target was predictable or not.
CONCLUSION: The data indicate that in tic disorders, the presence of ADHD is associated with difficulties in waiting to initiate preprogrammed movements independently of response selection or response timing difficulties.