Slow cortical potential neurofeedback in attention deficit hyperactivity disorder: Is there neurophysiological evidence for specific effects?

Department of Child and Adolescent Psychiatry, University of Zurich, Neumuensterallee 9, 8032, Zurich, Switzerland.
Journal of Neural Transmission (Impact Factor: 2.87). 10/2008; 115(10):1445-56. DOI: 10.1007/s00702-008-0104-x
Source: PubMed

ABSTRACT This study compared changes in quantitative EEG (QEEG) and CNV (contingent negative variation) of children suffering from ADHD treated by SCP (slow cortical potential) neurofeedback (NF) with the effects of group therapy (GT) to separate specific from non-specific neurophysiological effects of NF. Twenty-six children (age: 11.1 +/- 1.15 years) diagnosed as having ADHD were assigned to NF (N = 14) or GT (N = 12) training groups. QEEG measures at rest, CNV and behavioral ratings were acquired before and after the trainings and statistically analyzed. For children with ADHD-combined type in the NF group, treatment effects indicated a tendency toward improvement of selected QEEG markers. We could not find the expected improvement of CNV, but CNV reduction was less pronounced in good NF performers. QEEG changes were associated with some behavioral scales. Analyses of subgroups suggested specific influences of SCP training on brain functions. To conclude, SCP neurofeedback improves only selected attentional brain functions as measurable with QEEG at rest or CNV mapping. Effects of neurofeedback including the advantage of NF over GT seem mediated by both specific and non-specific factors.

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    • "Prior research classified the subjects into learners or non-learners according to their learning ability. Some studies reported the cases of non-learners even after repeated training sessions (Kotchoubey et al., 1999; Hanslmayr et al., 2005; Kropotov et al., 2005; Doehnert et al., 2008; deBeus and Kaiser, 2011; Escolano et al., 2011; Weber et al., 2011; Zoefel et al., 2011; Enriquez-Geppert et al., 2013b; Kouijzer et al., 2013). In Weber et al. (2011), about 50% of subjects were non-learners in sensorimotor rhythm (SMR; 12–15 Hz) neurofeedback. "
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    Frontiers in Human Neuroscience 07/2014; 8:500. DOI:10.3389/fnhum.2014.00500 · 2.90 Impact Factor
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    • "' capabilities to success - fully conclude neurofeedback training . Data across studies suggest that about a third of the participants ultimately can be classified as so - called non - responders : subjects who do not learn to significantly modulate their brain activity over the course of the training in accor - dance with instructions ( e . g . , Doehnert et al . , 2008 ; Drechsler et al . , 2007 ; Fuchs et al . , 2003 ; Kotchoubey et al . , 1999 ) . Correspondingly , non - responding participants also tend not to show changes in behav - ioral outcome measures ( e . g . , Hanslmayr et al . , 2005 ; Lubar et al . , 1995 ) . Yet , one also has to acknowledge that there is no real consensus on how to actu"
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