 One such study indicated a link between prenatal exposure to alcohol and vulnerability towards blackouts, in addition to the oft-cited link between this type of exposure and alcoholism.Alternatively, two studies have indicated that there appears to be a genetic predisposition towards blacking out, suggesting that some individuals are more susceptible to alcohol-related amnesia.From a neurobiological perspective, central serotonin (5-hydroxytryptamine, 5-HT) neurotransmission has been shown to modulate both alcohol consumption and impulsivity.