Many of the symptoms and signs that you describe apply to other personality disorders as well (example: the histrionic personality disorder or the borderline personality disorder). Are we to think that all personality disorders are interrelated?
All personality disorders are interrelated, in my view, at least phenomenologically. We have no Grand Unifying Theory of Psychopathology. We do not know whether there are - and what are - the mechanisms underlying mental disorders. At best, mental health professionals register symptoms (as reported by the patient) and signs (as observed). Then, they group them into syndromes and, more specifically, into disorders. This is descriptive, not explanatory science. Sure, there are a few theories around (psychoanalysis, to mention the most famous) but they all failed miserably at providing a coherent, consistent theoretical framework with predictive powers.
Patients suffering from PDs have many things in common:
Most of them are insistent (except those suffering from the Schizoid or the Avoidant Personality Disorders). They demand treatment on a preferential and privileged basis. They complain about numerous symptoms. They never obey the physician or his treatment recommendations and instructions.
They regard themselves as unique, display a streak of grandiosity and a diminished capacity for empathy (the ability to appreciate and respect the needs and wishes of other people). They regard the physician as inferior to them, alienate him using umpteen techniques and bore him with their never-ending self-preoccupation.
They are manipulative and exploitative because they trust no one and usually cannot love or share. They are socially maladaptive and emotionally unstable.
Most personality disorders start out as problems in personal development which peak during adolescence and then become personality disorders. They stay on as enduring qualities of the individual. Personality disorders are stable and all-pervasive - not episodic. They affect most of the areas of functioning of the patient: his career, his interpersonal relationships, his social functioning.
The patient is not happy, to use an understatement. He is depressed, suffers from auxiliary mood and anxiety disorders. He does not like himself, his character, his (deficient) functioning, or his (crippling) influence on others. But his defences are so strong, that he is aware only of the distress - and not of its reasons to it.
The patient with a personality disorder is vulnerable to and prone to suffer from a host of other psychiatric disturbances. It is as though his psychological immunological system has been disabled by the personality disorder and he falls prey to other variants of mental sickness. So much energy is consumed by the disorder and by its corollaries (example: by obsessions-compulsions), that the patient is rendered defenceless.
Patients with personality disorders are alloplastic in their defences. In other words: they tend to blame the external world for their mishaps. In stressful situations, they try to pre-empt a (real or imaginary) threat, change the rules of the game, introduce new variables, or otherwise influence the external world to conform to their needs. This is as opposed to autoplastic defences exhibited, for instance, by neurotics (who change their internal psychological processes in stressful situations).
The character problems, behavioural deficits and emotional deficiencies and instability encountered by the patient with personality disorder are, mostly, ego-syntonic. This means that the patient does not, on the whole, find his personality traits or behaviour objectionable, unacceptable, disagreeable, or alien to his self. As opposed to that, neurotics are ego-dystonic: they do not like who they are and how they behave on a constant basis.
- The personality-disordered are not psychotic. They have no hallucinations, delusions or thought disorders (except those who suffer from a Borderline Personality Disorder and who experience brief psychotic "microepisodes", mostly during treatment). They are also fully oriented, with clear senses (sensorium), good memory and general fund of knowledge.
The Diagnostics and Statistics Manual [American Psychiatric Association. DSM-IV-TR, Washington, 2000] defines "personality" as:
"...enduring patterns of perceiving, relating to, and thinking about the environment and oneself ... exhibited in a wide range of important social and personal contexts."
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