TITLE:
A Mathematical Model of Borderline Personality Disorder
AUTHORS:
Betty Chebet, Onyango Lawrence Omondi, Elisha Achieng Ogada
KEYWORDS:
Borderline Personality Disorder, Bifurcation, Attractor Dynamics, Emotional Instabilities, Persistence of Symptoms, Transient Stress and Affective Reactivity
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.14 No.9,
September
17,
2026
ABSTRACT: In this article, a dynamical system model of Borderline Personality Disorder (BPD) has been developed and analyzed. The model takes into account the instantaneous effective responses, the emotional instability, difficulties in relationships and impulsive behaviors. A minimum linear model for parameter estimation followed by nonlinear generalization with Hill function based self excitations and social reinforcements are introduced. The derivation of the model, its stability and bifurcation analyses, and stimulation results are presented, showing how feedbacks are responsible for elevated levels of symptoms severity under transient stress conditions and how variations of treatment parameters affects attractor dynamics. The article is concluded with a guide to model parametrization based on intensive longitudinal measures, parents daily experiences, highlighting potential issues and giving future directions for computational psychiatry.