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- faculteit der gedrags- en bewegingswetenschappen ( sectie ontwikkelingspsychologie )
- PhD student
Tieme Janssen (1985) is a PhD student at the Clinical Neuropsychology department at the VU University in Amsterdam. In cooperation with Rosa van Mourik (post-doc) and Jaap Oosterlaan (professor of pediatric clinical neuropsychology) he is involved in the treatment study ‘Braingymnastics’. This project compares the effects of three treatments for ADHD (age 7-13): neurofeedback, physical exercise and medication (methylphenidate). One of his main interests is the neurocognitive functioning of children with ADHD, and the clinical implications (and applications) that could result from this knowledge.
Research methods. Electroencephalography (EEG: power spectra, Event Related Potentials (ERPs), network characteristics), functional Magnetic Resonance Imaging (fMRI), Neuropsychology, Actigraphy
Interventions. Neurofeedback, physical exercise and medication (methylphenidate)
Clinical relevance of the research. Pharmacological interventions effectively reduce symptoms of ADHD in many children. However, 20-30% of the ADHD population does not respond to medication or experience adverse side effects. Furthermore, the effects of medication are merely immediate, disappearing after ceasing treatment. Another important concern is the large number of children discontinuing their treatment within 1 year after the first description. Clearly, there is a need for an extension of treatment options, with long lasting effects.
•Tutor during the course ‘Neuropsychological diagnostics’ (Sep-Oct 2010)
•Mentor for ‘Practical Issues in Neuropsychological Studies’ (2010 - continuing)
•Supervisor of Bachelor and (Research) Master Theses (2010 – continuing)
•Invitation lectures on the neurocorrelates of ADHD, treatments for ADHD, physical exercise and cognition
Widely accepted among scientists is the heterogeneous nature of ADHD, which is apparent on the behavioural, neuropsychological and neurophysiological level. Many studies have identified subgroups based on objective measures, like EEG. One of the future challenges in clinical neuroscience is to find meaningful subtypes within ADHD, which are more homogeneous and therefore potentially more suitable for research and treatment development.
Internet site of our current study 'Braingymnastics':