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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.
Therapeutic nihilism slowly faded in the 19th century as systematic reform of the medical education system took place, then reappeared in the 20th century in a slightly different fashion than prior. The aggressive empiricism of the 19th century enlightened the medical society of the need to thoroughly evaluate every aspect of clinical practice.
Somatic type: delusions that the person has some physical defect or general medical condition; Mixed type: delusions with characteristics of more than one of the above types but with no one theme predominating. Unspecified type: delusions that cannot be clearly determined or characterized in any of the categories in the specific types. [16]
In rare instances, it can include delusions of immortality. [9] Syndrome of delusional companions is the belief that objects (such as soft toys) are sentient beings. [10] Clonal pluralization of the self, where a person believes there are multiple copies of themselves, identical both physically and psychologically, but physically separate and ...
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 ...
People with psychotic depression experience the symptoms of a major depressive episode, along with one or more psychotic symptoms, including delusions and/or hallucinations. [2] Delusions can be classified as mood congruent or incongruent, depending on whether or not the nature of the delusions is in keeping with the individual's mood state. [2]