Figure 1. Brain sites with significant positive correlations between MD values and AHI scores in patients with OSA.

These sites include the frontal cortices (a), parietal cortices (b), basal pons (c), cerebellar cortices (d), bilateral ventral medial prefrontal cortices (e), anterior cingulate (f), insula (g), internal capsule cortices (h), hippocampus (i), amygdala (j), prefrontal cortices (k), and ventral temporal lobes (l). Color bar represents t statistic values (L = left; R = right). AHI = apnea-hypopnea index, MD = mean diffusivity, OSA = obstructive sleep apnea.