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Paranoid personality disorder (PPD) is a mental disorder characterized by paranoia, and a pervasive, long-standing suspiciousness and generalized mistrust of others. People with this personality disorder may be hypersensitive, easily insulted, and habitually relate to the world by vigilant scanning of the environment for clues or suggestions that may validate their fears or biases.
In object relations theory, the paranoid-schizoid position is a state of mind of children, from birth to four or six months of age. Melanie Klein [2] has described the earliest stages of infantile psychic life in terms of a successful completion of development through certain positions. A position, for Klein, is a set of psychic functions that ...
Individuals who experience disorders such as major depressive disorder, schizoaffective disorder, schizophreniform disorder, brief psychotic disorder, delusional disorder and schizotypal personality disorder have all been known to exhibit similar symptoms to children who have been diagnosed with CS. [53]
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Cluster A personality disorders are characterized by odd and uncommon thinking or behavior. This includes paranoid personality disorder, schizoid personality disorder and schizotypal personality disorder. Cluster B : Disorders are distinguished by overly emotional behavior leading up to unpredictable thinking/behavior, and being overly dramatic.
The cause of delusional disorder is unknown, [9] but genetic, biochemical, and environmental factors may play a significant role in its development. [ better source needed ] Some people with delusional disorders may have an imbalance in neurotransmitters , the chemicals that send and receive messages to the brain. [ 19 ]
Paraphrenia is often associated with a physical change in the brain, such as a tumor, stroke, ventricular enlargement, or neurodegenerative process. [4] Research that reviewed the relationship between organic brain lesions and the development of delusions suggested that "brain lesions which lead to subcortical dysfunction could produce delusions when elaborated by an intact cortex".
Schizotypal personality disorder (StPD or SPD), also known as schizotypal disorder, is a cluster A personality disorder. [4] [5] The Diagnostic and Statistical Manual of Mental Disorders (DSM) describes the disorder specifically as a personality disorder characterized by thought disorder, paranoia, a characteristic form of social anxiety, derealization, transient psychosis, and unconventional ...