Cover legend: Functional connectivity and networks in the infant brain. Spontaneous fluctuations in brain activity of neonates, 3-month-old infants, and 6-month-old infants were examined by using 94-channel near-infrared spectroscopy (NIRS). The temporal correlations of continuous signals between all the pairs of measurement channels revealed the functional connectivity of the cortical networks. The small, middle, and large circles represent the results of neonates, 3-month-old infants, and 6-month-old infants, respectively. The circles and white lines show the positions of measurement channels and connectivity (correlation coefficients > 0.5), respectively. The six clusters can be identified by coloring. The cortical network organization showed regional dependency and dynamic changes in the course of development. For more information, see the paper by Homae et al. in this issue (pages 4877–4882).