ISSN:
1573-3270
Keywords:
semantic ERP
;
event related potential
;
learning disability
;
ADHD
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Cortical event-related potentials (ERP) were recorded over FZ, CZ, and PZ scalp sites in 15 learning-disabled (LD), 14 gifted (G), and 13 normal control (N) children of ages 8–12. The common stimulus consisted of nouns presented 80 percent of the time; the target stimulus of animal names presented 20 per cent of the time. ERPs were averaged over subjects from 180 msec pre-stimulus to 900 msec post-stimulus. Principal components analysis was used to determine if there were amplitude differences at different post-stimulus latencies as a function of condition. Differences in ERP's between groups (LD, gifted, and controls), scalp locations, and common versus target stimuli were analyzed by ANOVAs. P 3 , Late, P 2 , and N 1 components represented by four factors were identified. Significant differences between G and LD and the N and LD groups were found target stimulus at all central locations for the P 3 component. Differences were found centrally between G and LD, G and N, and N and LD groups for the P 2 component centrally. Other differences were found for the N 1 and late components. These differences could be interpreted as a deficit in either attentional mechanisms or information processing for the LD group.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01000090
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