Visual Contrast Sensitivity Improvement by Right Frontal High-Beta Activity Is Mediated by Contrast Gain Mechanisms and Influenced by Fronto-Parietal White Matter Microstructure. - Quentin R; Elkin Frankston S; Vernet M; Toba MN; Bartolomeo P; Chanes L; Valero-Cabré A (Cerebral cortex (New York, N.Y. : 1991), 2016)