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Current cognitive neuropsychology research points toward a two-factor approach to the cause of monothematic delusions. [1] The first factor being the anomalous experience—often a neurological defect—which leads to the delusion, and the second factor being an impairment of the belief formation cognitive process.
Delusions of grandeur, also known as grandiose delusions (GDs) or expansive delusions, [1] are a subtype of delusion characterized by the extraordinary belief that one is famous, omnipotent, wealthy, or otherwise very powerful or of a high status. Grandiose delusions often have a religious, science fictional, or supernatural theme
A delusion [a] is a fixed belief that is not amenable to change in light of conflicting evidence. [2] As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, hallucination, or some other misleading effects of perception, as individuals with those beliefs are able to change or readjust their beliefs upon reviewing the evidence.
Delusions can be bizarre or non-bizarre in content; [7] non-bizarre delusions are fixed false beliefs that involve situations that could occur in real life, such as being harmed or poisoned. [8] Apart from their delusion or delusions, people with delusional disorder may continue to socialize and function in a normal manner and their behavior ...
Somatoparaphrenia is a type of monothematic delusion where one denies ownership of a limb or an entire side of one's body. Even if provided with undeniable proof that the limb belongs to and is attached to their own body, the patient produces elaborate confabulations about whose limb it really is or how the limb ended up on their body.
Hypnotic delusions are very similar to clinical delusions, in that both subjects exhibit delusional resistance to challenge and autobiographical memory during delusions. [20] When their beliefs are challenged, both clinical and hypnotic patients will defend their delusional beliefs, will refuse to reject their beliefs, and will provide ...
Capgras delusion or Capgras syndrome is a psychiatric disorder in which a person holds a delusion that a friend, spouse, parent, other close family member, or pet has been replaced by an identical impostor.
The two-factor model of delusions posits that dysfunction in both belief formation systems and belief evaluation systems are necessary for delusions. Dysfunction in evaluations systems localized to the right lateral prefrontal cortex, regardless of delusion content, is supported by neuroimaging studies and is congruent with its role in conflict ...