کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
324379 1433029 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long-Term Effects of Methylphenidate on Neural Networks Associated With Executive Attention in Children With ADHD: Results From a Longitudinal Functional MRI Study
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی پریناتولوژی (پزشکی مادر و جنین)، طب اطفال و بهداشت کودک
پیش نمایش صفحه اول مقاله
Long-Term Effects of Methylphenidate on Neural Networks Associated With Executive Attention in Children With ADHD: Results From a Longitudinal Functional MRI Study
چکیده انگلیسی

ABSTRACTObjectiveLittle is known about the long-term effects of stimulants on the functional organization of the developing brain. Nonacute effects of stimulants on neural activity related to three aspects of attention (alerting, reorienting, and executive control) were examined in children with attention-deficit/hyperactivity disorder (ADHD) using a longitudinal functional magnetic resonance imaging approach.MethodNine boys with ADHD were scanned while drug naïve (t1) and after 1 year of methylphenidate treatment (t2). Eleven matched controls were also investigated twice. ADHD children stopped medication 1 week before t2.ResultsAlthough all of the children showed stable alerting and reorienting performance from t1 to t2, normal controls significantly improved their executive control performance at t2, whereas children with ADHD did not. Neurally, controls showed a larger increase in neural activity from t1 to t2 in regions critical to task performance (i.e., in the temporoparietal junction during reorienting of attention and in the anterior cingulate cortex during executive control) compared to the patient group. However, only children with ADHD showed a decrease in neural activity in the insula and putamen during reorienting, indicating a reduction in compensatory brain activation over time.ConclusionsThese data suggest that 1 year of MPH treatment may be beneficial, albeit insufficient, to show enduring normalization of neural correlates of attention.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the American Academy of Child & Adolescent Psychiatry - Volume 46, Issue 12, December 2007, Pages 1633–1641
نویسندگان
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