Titre
EEG coherence changes during finger tapping in acallosal and normal children: a study of inter- and intrahemispheric connectivity.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Knyazeva, M.
Auteure/Auteur
Koeda, T.
Auteure/Auteur
Njiokiktjien, C.
Auteure/Auteur
Jonkman, E.J.
Auteure/Auteur
Kurganskaya, M.
Auteure/Auteur
de Sonneville, L.
Auteure/Auteur
Vildavsky, V.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
0166-4328[print], 0166-4328[linking]
Statut éditorial
Publié
Date de publication
1997-12
Volume
89
Numéro
1-2
Première page
243
Dernière page/numéro d’article
258
Langue
anglais
Notes
Publication types: Clinical Trial ; Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Résumé
The EEG inter- and intrahemispheric coherences (ICoh and HCoh) in the theta, alpha and beta bands were studied in an acallosal group (ACCG) of five children and a normal group of 30 sex- and age-matched children (NG) during resting and tapping conditions. Being functionally deficient, tapping in the ACCG was characterized by increased intertap intervals and variability (in right-hand tapping) and by variability together with decreased synchronization (in bimanual tapping). In the ACCG, frontal, central and parietal ICohs were shown to be smaller, while temporal ICohs were larger under all conditions (see also Koeda, T., Knyazeva, M., Jonkman, J., Njiokiktjien, C., De Sonneville, L., Vildavsky, V., 1995. The resting EEG in acallosal children: compensatory left hemisphere mechanisms? Electroencephalogr. Clin. Neurophysiol. 95, 397-407). The effect was most pronounced in the EEG beta band. The sagittal HCohs, including fronto-central, fronto-parietal, and centro-parietal HCohs within both hemispheres, were larger in the ACCG, whereas temporal HCoh (fronto-temporal, centro-temporal, parieto-temporal and occipito-temporal) were smaller, suggesting rearrangement of intracortical activity associated with callosal agenesis. Tapping induced an increase in ICoh and HCoh between frontal, central and parietal areas in the NG, and weak enhancement only in the left temporal HCoh in the ACCG. The beta band, the most reactive band in the NG, was 'silent' in the ACCG, suggesting deviant cortical function during motor activity as well.
PID Serval
serval:BIB_E38425AF2265
PMID
Date de création
2008-04-11T11:19:44.357Z
Date de création dans IRIS
2025-05-20T22:54:33Z