6b, Table 5). This amygdalar activity was nearly identical to the region activated in healthy controls during the viewing of masked happy faces. A significant positive association was also detected for activity within the midcingulate during the viewing of masked happy faces and marijuana level, as determined by urinary cannabinoid level (x, y, z = 16, 10, 30; t = 3.70, p< 0.05; k = 37; see Figure 7, Table 5).