EEG coherence at rest and during a visual task in two groups of children.
Electroencephalogr Clin Neurophysiol
; 67(2): 151-8, 1987 Aug.
Article
in En
| MEDLINE
| ID: mdl-2439292
ABSTRACT
EEG coherence was studied in a group of n = 31 normal children (NG) and in a group of n = 25 mildly mentally retarded children (EG), 10-13 years old. This was done for a recording at rest, eyes closed, and one during which a visual matching task was presented. Coherence showed little structure across frequency, apart from a slow decline towards higher frequencies. For the EEG at rest, coherence was higher for the EG and a slight increase with age was found. The visual task changed the coherence pattern in a complex way, and differently for the two groups. Coherence decreased in the fronto-central region (about the same in both groups) and increased in occipito-parietal central combinations (more so for the NG). The delta band showed predominantly an increase for the NG.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Visual Perception
/
Electroencephalography
Limits:
Adolescent
/
Child
/
Humans
Language:
En
Journal:
Electroencephalogr Clin Neurophysiol
Year:
1987
Type:
Article