Fig. 2From: Association between insomnia and cognitive performance, gray matter volume, and white matter microstructure in cognitively unimpaired adultsEffect of insomnia on gray matter volume. a Blue-green colored regions show areas with significantly lower volume in participants with insomnia compared with controls (puncorrected< 0.005; k = 100). b Red-yellow colored areas show areas with significantly higher brain volume in participants with insomnia compared with controls. L, left hemisphere; R, right hemisphereBack to article page