Chapter 29: Personality Disorders

Personality Disorders overview delves into the clinical landscape of personality disorders as presented in psychiatric nursing education. It defines these conditions as persistent, inflexible patterns of internal experience and outward behavior that significantly differ from cultural norms, typically emerging by early adulthood. Using the five-factor model of personality—which measures emotional stability, extroversion, agreeableness, conscientiousness, and openness—the chapter explains how maladaptive traits become dysfunctional when they are rigidly fixed at extreme ends of the spectrum. These disorders are categorized into three primary clusters to aid in diagnosis and treatment planning. Cluster A focuses on odd or eccentric behaviors, detailing the profound mistrust found in paranoid personality, the extreme social detachment of schizoid personality, and the cognitive distortions and eccentricities characteristic of schizotypal personality. Cluster B highlights dramatic and erratic presentations, including the rights-violating behaviors of antisocial personality, the intense emotional instability and "splitting" defense mechanism of borderline personality disorder (BPD), the theatrical attention-seeking of histrionic personality, and the grandiosity and vulnerability of narcissistic personality. Cluster C covers anxious and fearful traits, encompassing the hypersensitivity to rejection in avoidant personality, the submissive reliance on others in dependent personality, and the stifling perfectionism and control of obsessive-compulsive personality disorder. The text examines contemporary etiologies, linking these disorders to neurobiological factors such as serotonin dysregulation and structural changes in the amygdala and prefrontal cortex, often exacerbated by childhood trauma or neglect. For nursing professionals, management centers on establishing a therapeutic relationship based on trust, consistency, and clear boundaries. The summary emphasizes the importance of limit setting to manage manipulation and the use of specialized modalities like Dialectical Behavior Therapy (DBT) to address life-threatening impulses and emotional dysregulation in complex cases.