![]() In the ICD-11, the condition is called secondary personality change rather than organic personality disorder. One explanation of signs of anger and aggression is due to an inability to handle their impulses, this type of aggression being called " impulsive aggression". Patients can show aggressive behaviour and these dysfunctions in behaviour can have effects on interpersonal relationships. Patients with OPD express a feeling of unreasonable satisfaction and euphoria. Īnother common feature of personality of patients with OPD is their dysfunctional and maladaptive behaviour that causes serious problems in these patients, because they face problems with pursuit and achievement of their goals. OPD may also be caused by lesions in other circumscribed brain areas. OPD is most often caused by lesions in three brain areas of frontal lobe: traumatic brain injuries in orbitofrontal cortex, anterior cingulate cortex and dorsolateral prefrontal cortex. Children whose brain areas have been injured or damaged, may present with attention deficit hyperactivity disorder (ADHD), oppositional defiant disorder or OPD. The most common reason for this profound change in personality is the traumatic brain injury. This mental health disorder can be caused by disease, brain damages or dysfunctions in specific brain areas in frontal lobe. The OPD is included in a group of personality and behavioural disorders - in the ICD-10 this is "Personality and behavioural disorders due to brain disease, damage and dysfunction", and in the ICD-11 this is "Secondary Mental or Behavioural Syndromes Associated with Disorders or Diseases Classified Elsewhere". ![]() ![]() OPD is associated with "personality change due to general medical condition". Furthermore, patients may show changes in their sexual preference and hyposexuality symptoms. Altered language processing in the brain can also occur. Those affected can experience cognitive disturbances, suspiciousness and paranoia. In addition, patients may show a reduction in ability of perseverance with goals and they disinhibition, often characterised by inappropriate sexual and antisocial behavior. Those with OPD can experience emotional lability, meaning that their emotional expressions are unstable and fluctuating. OPD is associated with a large variety of symptoms, such as deficits in cognitive function, dysfunctional/abnormal behaviour, psychosis, neurosis, higher irritability and altered emotional expression. The condition has not been described in any edition of the Diagnostic and Statistical Manual of Mental Disorders. In the ICD-11, it is described as a syndrome. In the ICD-10, it is described as a mental disorder and not included in the classification group of personality disorders. Abnormal behavior can include but is not limited to apathy, paranoia and disinhibition. It is characterized by a significant personality change featuring abnormal behavior due to an underlying traumatic brain injury or another pathophysiological medical condition affecting the brain. Organic personality disorder (OPD) or secondary personality change, is a condition described in the ICD-10 and ICD-11 respectively.
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