The relationship of impulsivity to each of these disorders is clinically meaningful (e.g., impulsive behaviors are per se symptoms and directly contribute to psychological distress), but the fact that it features in each of these conditions may be more than simply descriptive. Indeed, these disorders represent a constellation of syndromes that are frequently comorbid with one another, and one hypothesis is that heightened impulsive tendencies represent one potential influence or cause driving the simultaneous presentation of these conditions.21, 30, 35–43
