Fig. 3.

Spatial ASI analysis and its development. (A) In addition to the temporal variability seen as the interquartile range of GS values in successive epochs, there was also an overall increase in GS values with increasing PMA, (B) graphs depicting the developmental change in the mean ASI of each EEG channel compared to the other 7 channels, which have all significant correlations, (C) graphs representing the developmental change in the mean ASI over the given spatial subgroup as schematically shown in the topoplots. Premature infants with early IVH grade III are shown in gray (for GS and interhemispheric synchrony). The right most plot depicts developmental change of the first component of principal component analysis (PCA). Significance of the correlation is depicted with an asterisk after correlation coefficient ‘r’. The value ‘a’ depicts the slope of linear regression computed for the given graph.