Figure 5.

Covariance matrix for heritability of full concatenated data set as input into the frequency PCA. Although there is a degree of overlap in the lower frequencies, frequency bands in the delta/theta, alpha, high and low beta, and high and low gamma can be seen based on relative covariance between and within bands. Similarities in power across time between evoked delta/theta and alpha frequency bands might be expected in this task, as they are primary contributors to the large ERPs such as P3 and slow wave (Basar et al., 1999). The similarities between the heritability patterns and those commonly seen in raw power values bolster the connection between genetic effects and the underlying biology of the distinctions between frequency bands.