“…During symptom provocation, OCD patients show activation of anterior insula [101,102]; similarly, studies focusing on disgust processing have identified hyperactivity in anterior [103,104] and midposterior [104,105] insula when patients view disgusting images. Further, several paradigms exploring brain functioning in OCD when patients perform cognitive tasks not directly related to symptoms have identified hyperactivity in the insula, including tasks of error detection [106], conflict detection [107], decision making [108], planning [109], response inhibition [110] working memory [111], fearful face processing [112], loss anticipation [113,114], reward [114], and negative performance feedback [115]. Although hyperactivations in these studies are more frequently reported in anterior insula [106][107][108][109][112][113][114] than in mid-posterior insula [110,111,114,115], there are no readily apparent psychological or cohort factors that explain the anterior-posterior differences among studies.…”