A preliminary study on hot and cool executive functions in bipolar disorder and on their association with emotion regulation strategies.

Objective. Individuals with bipolar disorder (BD) experience difficulties in cognitive and emotional regulation in different phases of illness. In the present study, we aimed at exploring differences on hot and cool executive functioning (EF) between BD patients in euthymia (BDe) and mania (BDm), and associations of hot and cool EF with emotion regulation strategies. Methods. Thirty-seven BD patients (among which 18 with a current manic episode and 19 in euthymia) and 15 healthy controls completed a battery of tests assessing hot and cool EF and emotion regulation strategies. Results. Between group comparisons showed that in all the explored hot dimensions BDm subjects had significantly worse performances than BDe subjects, while in all the explored cool dimensions BDm subjects had significantly worse performances than HC subjects, with BDe patients having an intermediate profile. Results from bivariate correlations among BDe subjects (but not among BDm subjects) showed significant positive correlations (i) between elements of hot EF and elements of cool EF, and (ii) between cognitive reappraisal emotional regulation strategy and planning (i.e., a measure of cool EF), as well as a significant negative correlation between expressive suppression emotional regulation strategy and emotional intelligence. Conclusions. The results confirm previous findings on a role of impaired EF in BD, and suggest (i) that hot EF is more closely related to mood (i.e., state-dependant) than cool EF, and (ii) that BD patients can more effectively use emotion regulation strategies in association with EF during euthymia than during mania.