The basal ganglia play a central role in regulating the response selection abilities that are critical for mental flexibility. In neocortical areas. higher cardiorespiratory fitness levels are associated with increased gray matter volume. and these volumetric differences mediate enhanced cognitive performance in a variety of tasks. https://www.roneverhart.com/AMS-Neve-1073SPX-Single-Preamp-and-EQ-p33827/