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Effects of methylphenidate on working memory functioning in children with attention deficit/hyperactivity disorder

Kobel, Maja and Bechtel, Nina and Weber, Peter and Specht, Karsten and Klarhöfer, Markus and Scheffler, Klaus and Opwis, Klaus and Penner, Iris-Katharina. (2009) Effects of methylphenidate on working memory functioning in children with attention deficit/hyperactivity disorder. European journal of paediatric neurology, Vol. 13. pp. 516-523.

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Official URL: http://edoc.unibas.ch/dok/A5253218

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Abstract

Background and aims: Children with attention deficit/hyperactivity disorder (ADHD) often show deficits in working memory performance. Methylphenidate (MPH) is an effective medication to improve these cognitive difficulties. This study aimed to clarify which effect MPH induces on the underlying functional networks of working memory. Methods: Fourteen boys diagnosed with ADHD and 12 healthy controls were investigated using functional magnetic resonance imaging (fMRI). Each patient was tested twice, once with medication and once without. The fMRI experiments consisted of three verbal N-back tasks with increasing difficulty. Functional images were acquired on a 3 Tesla head scanner. Results: On the behavioral level, medicated patients performed similar to healthy controls and significantly better than without medication. on the functional level, patients showed the expected frontal and parietal activations, which were more pronounced in the 2- and 3-back tasks. Healthy controls showed significantly more activation in these regions and additional activation in the cerebellum. Interestingly, patients showed an additional effect of laterality. Left-sided frontal and parietal activation in patients was significantly less pronounced than in controls. Conclusion: Functional data indicate different activation patterns in verbal working memory tasks between healthy controls and patients with ADHD irrespective of medication condition. Intake of MPH led to a clear improvement on a behavioral level. However, this effect was not reflected by changes in functional brain organization. MPH-induced changes leading to better performance in verbal working memory tasks might be very subtle and therefore not detectable by fMRI. (C) 2008 European Paediatric Neurology Society.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
03 Faculty of Medicine > Bereich Kinder- und Jugendheilkunde (Klinik) > Kinder- und Jugendheilkunde (UKBB) > Neuro- und Entwicklungspädiatrie (Weber)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Kinder- und Jugendheilkunde (Klinik) > Kinder- und Jugendheilkunde (UKBB) > Neuro- und Entwicklungspädiatrie (Weber)
07 Faculty of Psychology > Departement Psychologie > Forschungsbereich Persönlichkeits- und Entwicklungspsychologie > Allgemeine Psychologie und Methodologie (Opwis)
07 Faculty of Psychology > Departement Psychologie > Ehemalige Einheiten Psychologie > Clinical Cognitive Research (Penner)
UniBasel Contributors:Opwis, Klaus and Penner, Iris-Katharina and Bechtel, Nina and Scheffler, Klaus and Weber, Peter
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:1090-3798
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:01 Mar 2013 11:11
Deposited On:22 Mar 2012 13:45

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