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A pseudohallucination (from Ancient Greek: ψευδής (pseudḗs) ' false, lying ' + hallucination) is an involuntary sensory experience that is vivid enough to be perceived as a hallucination, but is recognised by the individual as subjective and lacking objective reality. [1]
Kandinsky described a state involving auditory hallucinations that were perceived to be "made by someone else," which he termed pseudohallucinations. Over time, Kandinsky found the term "pseudohallucinations" confusing and preferred terms such as "hallucinoid," "presentation," "illumination", and "illustration."
The syndrome is commonly accompanied by frequent hallucinations, pseudohallucinations, and visual illusions. [ 5 ] Individuals with oneiroid syndrome typically recognise the perceived phenomena as belonging to alternate realms or dimensions inaccessible to ordinary people, rather than to the tangible, external world. [ 5 ]
Autism spectrum disorder and schizotypal personality disorder can appear outwardly similar but have different etiologies and require different treatment approaches. [3] [21] The presence of self-disorders is evidence for a diagnosis of schizotypal personality disorder over autism spectrum disorder.
Paraphrenia is different from schizophrenia because, while both disorders result in delusions and hallucinations, individuals with schizophrenia exhibit changes and deterioration of personality whereas individuals with paraphrenia maintain a well-preserved personality and affective response. [2] [7]
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.
Dissociative disorders: People with severe disturbances of their self-identity, memory, and general awareness of themselves and their surroundings may be classified as having these types of disorders, including depersonalization derealization disorder or dissociative identity disorder (which was previously referred to as multiple personality ...
Stimulant psychosis is a mental disorder characterized by psychotic symptoms (such as hallucinations, paranoid ideation, delusions, disorganized thinking, grossly disorganized behaviour). It involves and typically occurs following an overdose or several day binge on psychostimulants , [ 1 ] although it can occur in the course of stimulant ...