4.4.1. Attention, inhibition and cognitive flexibility tasks One simple way to test attention is the continuous performance test (CPT): it has been used in UR with 2 levels of difficulty . In terms of behavioral results, BDP and UR had significant lower accuracy during the correct target condition relative toHC. During this condition, BDP had significantly lower right in sulaactivation compared to HC and UR. The latest had a greater deactivation of the PCC compared to BDP and HC. During the most difficult condition, UR also showed increased activity in the bilateral inferiorparietal lobule and the left insula. Finally, during the incorrect tar-get condition, increased activity of the posterior part of the middlecingulate cortex and of the insula bilaterally was observed in both BDP and UR compared to HC (with intermediate activation level of the left insula in UR).