[Comparative analysis of the infant EEG at gestation term 30-42 weeks].
The research involved comparison of characteristics of the power spectrum, index, coherence of the EEG at preterm and full-term infants of the first month of life. 6 groups of children are surveyed: (1) 30-32, (2) 33-34, (3) 35-36, (4) 37-38, (5) 39-40, (6) 41-42 weeks of gestation; each group consisted of 10 children. Capacity of delta frequencies was high in the 5th group. Capacity of theta frequencies was high in the 3rd group. The index of theta frequencies was high in the 2nd, 3rd and 4th groups. Capacity of alpha frequencies was hagh in the 2nd group. The index of alpha frequencies was high in the 1st, 2nd and 3rd groups. Indexes and of beta1- and beta2-frequencies were higher in the 1st, 2nd and 4th groups. The maximum quantity of coherent delta, theta and alpha frequencies was in the 6th group. In the 2nd group, in comparison with 5th group, were more coherent delta frequencies in the occipital and occipital-central areas. The results obtained show that the spectrum of capacity, indexes and coherence of the EEG depend on term of gestation at the moment of birth but this dependence has nonlinear character.
Batuev
A S
AS
Iovleva
N N
NN
Koshchavtsev
A G
AG
D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology*; D008297:Male; D011247:Pregnancy