The borderline personality disorder is a part of the «Impulse spectrum disorders». At the borderlines patients, the impulsiveness expresses itself clinically on two plans: acting out violent and the conducts of dependence.

We propose in this work:

1. – To study the impulsiveness and its consequences at the patients presenting a borderline personality.

2. – And to raise factors correlated in a stronger impulsiveness among these subjects.

It is about a transverse study which took place over a period of 1year. It concerned 50 patients to which the diagnosis of borderline personality was retained according to the criteria of the DSM-IV-TR and having been hospitalized at least once.

We used a semi structured questionnaire managed by an investigator and specific scales of measure.

Our patients with a borderline personality disorder showed important rates of impulsiveness in its three subcategories motricity, non-plannig and cognitive.

This impulsiveness was at the origin of multiple violent acting out. The violence often shows itself from verbal way, then, it can degenerate and take other forms.

Factors correlated at the important rates of impulsiveness at our borderlines patients are: the young age (p = 0,047), the male gender (p = 0,033), personal antecedent of sexual or physical early abuse (p = 0,05 and p = 0,09) and the addictives conducts (p = 0,034).

The reduction of the impulsiveness constitutes an important stage in the coverage of these subjects and in the prevention of this aggressive behavior.