Cover legend: Cortical maturation in a 14-week-old infant as revealed by a maturation index computed from a normalized T2-weighted magnetic resonance image and projected onto a three-dimensional mesh of the gray–white matter cortical interface. The scale goes from dark blue to yellow-red as maturation increases. On this image, which is centered on the posterior sylvian scissure, the early maturation of primary cortices in the central region and Heschl's gyrus stands in contrast to the immature middle temporal gyrus. For more information, see the article by Leroy et al. in this issue (pages 1500–1506).