Distractibility in ad/hd predominantly inattentive and combined subtypes: The P3a ERP component, heart rate and performance

H A D Keage; C R Clark; Daniel F Hermens; M R Kohn; S Clarke; L M Williams; D Crewther; C Lamb; E Gordon

doi:10.1142/S0219635206001070

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Distractibility in ad/hd predominantly inattentive and combined subtypes: The P3a ERP component, heart rate and performance

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Distractibility in ad/hd predominantly inattentive and combined subtypes: The P3a ERP component, heart rate and performance

H A D Keage, C R Clark, Daniel F Hermens, M R Kohn, S Clarke, L M Williams, D Crewther, C Lamb and E Gordon

Journal of Integrative Neuroscience, Vol.5(1), pp.139-158

2006

DOI: https://doi.org/10.1142/S0219635206001070

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Abstract

AD/HD

ERP

P3a

distractibility

performance

peripheral arousal

The current study aimed to investigate whether children and adolescents diagnosed with Attention Deficit/Hyperactivity Disorder Predominantly Inattentive (AD/HD-in; Child n = 24, Adolescent n = 33) and Combined (AD/HD-com; Child n = 30, Adolescent n = 42) subtypes were more distractible than controls (Child n = 54; Adolescents n = 75), by assessing event-related potential (ERP), performance and peripheral arousal measures. All AD/HD groups displayed smaller amplitudes and/or shorter latencies of the P3a ERP component - thought to reflect involuntary attention switching - following task-deviant novel stimuli (checkerboard patterns) embedded in a Working Memory (WM) task. The P3a results suggested that both AD/HD-in and AD/HD-com subtypes ineffectively evaluate deviant stimuli and are hence more "distractible". These abnormalities were most pronounced over the central areas. AD/HD groups did not display any abnormalities in averaged heart rate over the WM task, a measure of peripheral arousal. They did display abnormalities in performance measures from the task, but these were unrelated to P3a abnormalities. AD/HD groups also displayed a number of deficits on Switching of Attention and Verbal Memory tasks, however, the pattern of abnormality mostly reflected general cognitive deficits rather than resulting from distraction. © Imperial College Press.

Details

Title: Distractibility in ad/hd predominantly inattentive and combined subtypes: The P3a ERP component, heart rate and performance
Authors: H A D Keage (Author) - Flinders University
C R Clark (Author) - Flinders University
Daniel F Hermens (Author) - University of Sydney
M R Kohn (Author) - University of Sydney
S Clarke (Author) - University of Sydney
L M Williams (Author) - University of Sydney
D Crewther (Author) - Swinburne University
C Lamb (Author) - Flinders Medical Centre
E Gordon (Author) - University of Sydney
Publication details: Journal of Integrative Neuroscience, Vol.5(1), pp.139-158
Publisher: IOS Press
Date published: 2006
DOI: 10.1142/S0219635206001070
ISSN: 0219-6352
Organisation Unit: University of the Sunshine Coast, Queensland; Thompson Institute
Language: English
Record Identifier: 99450597702621
Output Type: Journal article

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