Age-Associated Reduction of Asymmetry in Human Central Auditory Function: A 1H-Magnetic Resonance Spectroscopy Study

Figure 3

Schematic diagram of asymmetry of left and right auditory cortical metabolites in the young group before and after pure tone stimulation. Degree of asymmetry >0 indicates that the content of the auditory cortical metabolite on the left side is higher than that on the right side, whereas degree of asymmetry <0 indicates that the content of the auditory cortical metabolite on the right side is higher than that on the left side. Abbreviations: DA: degree of asymmetry; Cho: choline-containing compounds; Cr: creatine-containing compounds; Glx: glutamine/glutamate; NAA: N-acetyl-aspartate.