Based on previous evidence of a MAOA gene*cocaine use interaction on orbitofrontal cortex volume attrition, we tested whether the MAOA low activity variant and cocaine use severity are interactively associated with impulsivity and behavioral indices of orbitofrontal dysfunction: emotion recognition and decision-making.
Verdejo-Garcia, A. J., Albein-Urios, N., Molina, E., Ching-Lopez, A., Martinez-Gonzalez, J. M., & Gutierrez, B. (2013). A MAOA gene*cocaine severity interaction on impulsivity and neuropsychological measures of orbitofrontal dysfunction: preliminary results. Drug and Alcohol Dependence, 133(1), 287 - 290. https://doi.org/10.1016/j.drugalcdep.2013.04.031