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Altered Evoked Gamma-Band Responses Reveal Impaired Early Visual Processing in ADHD Children
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Lenz, Daniel; Krauel, Kerstin; Flechtner, Hans-Henning; Schadow, Jeanette; Hinrichs, Hermann; Herrmann, Christoph S. – Neuropsychologia, 2010
Neurophysiological studies yield contrary results whether attentional problems of patients with attention-deficit/hyperactivity disorder (ADHD) are related to early visual processing deficits or not. Evoked gamma-band responses (GBRs), being among the first cortical responses occurring as early as 90 ms after visual stimulation in human EEG, have…
Descriptors: Visual Stimuli, Cognitive Processes, Stimulation, Attention Deficit Hyperactivity Disorder
Electrophysiological Correlates of Semantic Processing during Encoding of Neutral and Emotional Pictures in Patients with ADHD
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Krauel, Kerstin; Duzel, Emrah; Hinrichs, Hermann; Lenz, Daniel; Herrmann, Christoph S.; Santel, Stephanie; Rellum, Thomas; Baving, Lioba – Neuropsychologia, 2009
The current study investigated the relevance of semantic processing and stimulus salience for memory performance in young ADHD patients and healthy control participants. 18 male ADHD patients and 15 healthy control children and adolescents participated in an ERP study during a visual memory paradigm with two different encoding tasks requiring…
Descriptors: Cues, Semantics, Attention Deficit Disorders, Hyperactivity