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Cotard's syndrome, also known as Cotard's delusion or walking corpse syndrome, is a rare mental disorder in which the affected person holds the delusional belief that they are dead, do not exist, are putrefying, or have lost their blood or internal organs. [1]
Extreme metaphysical nihilism, also sometimes called ontological nihilism, is the position that nothing actually exists at all. [103] [104] The American Heritage Medical Dictionary defines one form of nihilism as "An extreme form of skepticism that denies all existence". [105] A similar skepticism concerning the concrete world can be found in ...
A delusion [a] is a false 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.
In terms of diagnosing a non-bizarre delusion as a delusion, ample support should be provided through fact checking. In case of non-bizarre delusions, Psych Central [ 22 ] [ better source needed ] notes, "All of these situations could be true or possible, but the person suffering from this disorder knows them not to be (e.g., through fact ...
The term grandiose delusion overlaps with, but is distinct from, grandiosity. Grandiosity is an attitude of extraordinary self-regard (feelings of superiority, uniqueness, importance or invulnerability), while grandiose delusion concerns specific extraordinary factual beliefs about one's fame, wealth, powers, or religious and historical relevance.
A thought disorder (TD) is a disturbance in cognition which affects language, thought and communication. [1] [2] Psychiatric and psychological glossaries in 2015 and 2017 identified thought disorders as encompassing poverty of ideas, paralogia (a reasoning disorder characterized by expression of illogical or delusional thoughts), word salad, and delusions—all disturbances of thought content ...
This glossary covers terms found in the psychiatric literature; the word origins are primarily Greek, but there are also Latin, French, German, and English terms. Many of these terms refer to expressions dating from the early days of psychiatry in Europe; some are deprecated, and thus are of historic interest.
Delusional misidentification syndrome is an umbrella term, introduced by Christodoulou (in his book The Delusional Misidentification Syndromes, Karger, Basel, 1986) for a group of four delusional disorders that occur in the context of mental and neurological illness.