Schecklmann, Martin and Schaldecker, Matthias and Aucktor, Susanne and Brast, Julia and Kirchgaessner, Katharina and Muehlberger, Andreas and Warnke, Andreas and Gerlach, Manfred and Fallgatter, Andreas J. and Romanos, Marcel (2011) Effects of methylphenidate on olfaction and frontal and temporal brain oxygenation in children with ADHD. JOURNAL OF PSYCHIATRIC RESEARCH, 45 (11). pp. 1463-1470. ISSN 0022-3956, 1879-1379
Full text not available from this repository. (Request a copy)Abstract
Objective: Olfaction and attention-deficit-/hyperactivity disorder (ADHD) are mediated by dopamine metabolism and fronto-temporal functioning converging in recent findings of increased olfactory sensitivity in children with ADHD modulated by methylphenidate (MPH) and altered frontal and temporal oxygenation in adults with ADHD. Method: We investigated olfactory sensitivity, discrimination, and identification (Sniffin' Sticks) in 27 children and adolescents with ADHD under chronic MPH medication and after a wash-out period of at least 14 half-lives in balanced order and 22 controls comparable for handedness, age, and intelligence. In addition, inferior frontal and temporal oxygenation was measured by means of functional near-infrared spectroscopy (fNIRS) during the presentation of 2-phenylethanol. Group differences in regard to sex distribution were statistically controlled for by analysis of covariance. Results: Patients did not differ from controls in any olfactory domain under treatment with MPH. Cessation of medication led to a significant increase in olfactory discrimination. Controls displayed typical inferior frontal and temporal brain activity in response to passive olfactory stimulation, while brain oxygenation was diminished in the patient group when assessed without medication. Under medication ADHD patients showed a trend for a normalisation of brain activity in the temporal cortex. Conclusions: The here reported effects of MPH cessation on olfactory discrimination and frontal and temporal oxygenation along with previous findings of increased olfactory sensitivity in medication-naive ADHD children and its normalisation under chronic MPH treatment lead to the conclusion that MPH exerts differential chronic effects vs. acute cessation effects on altered olfactory function in ADHD. These effects are most probably mediated by modulation of the dopaminergic system. (C) 2011 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ATTENTION-DEFICIT/HYPERACTIVITY DISORDER; NEAR-INFRARED SPECTROSCOPY; DEFICIT-HYPERACTIVITY DISORDER; ODOR DISCRIMINATION; ADULT NEUROGENESIS; PARKINSONS-DISEASE; VERBAL FLUENCY; ACTIVATION; DOPAMINE; CORTEX; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Psychiatrie und Psychotherapie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 May 2020 07:17 |
| Last Modified: | 27 May 2020 07:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19863 |
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