Dexamphetamine normalises electrophysiological activity in attention deficit-hyperactivity disorder during the Stroop
S L Horrobin1, N A McNair, I J Kirk
1Department of Psychology, Research Centre for Cognitive Neuroscience, University of Auckland, Auckland, New Zealand.
Abstract:
A case study was conducted to investigate whether dexamphetamine enhances interference control in an adult with attention deficit/hyperactivity disorder. Continuous electroencephalography was recorded both on and off dexamphetamine during performance on a Stroop task. An age-, gender- and IQ-matched control also completed the same task. Event related potentials for the control participant revealed a positive potential to incongruent stimuli between 270 and 440 ms, whereas for the participant with attention deficit/hyperactivity disorder off medication, the reverse polarity was observed in a later time window. Following administration of dexamphetamine, however, the event-related potentials for the incongruent condition closely resembled those in the control, suggesting that dexamphetamine successfully normalises electroencephalographic activity.
More Related Videos
Related Concept Videos
Attention-Deficit/Hyperactivity Disorder
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
CNS Stimulants: Cocaine, Amphetamines and Cannabinoids
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists


