- simple hallucination
- Also referred to as elementary hallucination. Both terms are used to denote a hallucination of the lowest degree of complexity. In the auditory modality, simple hallucinations are known as * akoasms. Common examples of akoasms are clicking sounds, the sound of the door bell ringing, rustling noises, and buzzing. Akoasms may occur in the context of both peripheral and central conditions. In * tinnitus, akoasms tend to have a chronic and sometimes highly disturbing character. In the visual modality, simple hallucinations may take the form of *Eigengrau, *flickering scotomata, *photopsia, etc. Photopsia comprises a group of elementary visual phenomena such as * phosphenes, luminous rays, coruscations, heat waves, *snow lights, and * Moore's lightning streaks. Some of these simple phenomena can be provoked by gentle pressure to the eyeball (as in * pressure phosphenes) or caloric vestibular stimulation (leading to *vestibularly evoked visual hallucinations). It may therefore be tempting to believe that simple visual hallucinations invariably fall into the class of * entoptic phenomena. But again many of them are associated with both peripheral and central conditions. The same holds true for simple hallucinations occurring in the tactile modality, such as *paraesthesias, * formicative hallucinations, and *cocaine bugs. The term simple hallucination derives from a classification of hallucinations which employs complexity as a guiding principle. It is used in opposition to the terms *organized (or *formed) hallucination and *complex hallucination. By their nature, * olfactory and * gustatory hallucinations defy categorization based on degrees of complexity. The same holds true for *vestibular hallucinations, *proprioceptive hallucinations, *kinaesthetic hallucinations, and many *somatic and * sexual hallucinations.ReferencesBleuler, E. (1923). Lehrbuch der Psychiatrie. Vierte Auflage. Berlin: Verlag von Julius Springer.ffytche, D.H. (2007). Visual hallucinatory syndromes: Past, present, and future. Dialogues in Clinical Neuroscience, 9, 173-189.Jaspers, K. (1963). Gesammelte Schriften zur Psychopathologie. Berlin: Springer-Verlag.Wilkinson, F. (2004). Auras and other hallucinations: Windows on the visual brain. Progress in Brain Research, 144, 305-320.
Dictionary of Hallucinations. J.D. Blom. 2010.
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hallucination — [ a(l)lysinasjɔ̃ ] n. f. • 1660; lat. hallucinatio 1 ♦ Méd. Perception pathologique de faits, d objets qui n existent pas, de sensations en l absence de tout stimulus extérieur. ⇒ illusion, onirisme, rêve. Hallucinations visuelles (⇒ mirage,… … Encyclopédie Universelle
Simple partial seizure — Infobox Disease Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD10|G|40|1|g|40 ICD9 = ICD9|345.5 ICDO = OMIM = MedlinePlus = eMedicineSubj = neuro eMedicineTopic = 342 MeshID = D004828 Simple partial seizures are seizures which affect only a… … Wikipedia
elementary hallucination — see simple hallucination … Dictionary of Hallucinations
primitive hallucination — A term used (and possibly also introduced) in 1930 by the German psychologists Konrad Zucker and Julius Zâdor in the context of a study of * mescaline induced hallucinations to denote a relatively simple type of hallucination. Judging by the… … Dictionary of Hallucinations
reflex hallucination — Also known as reflex false perception and apperceptive hallucination. The German term Reflexhallucination was introduced in or shortly before 1866 by the German psychiatrist Karl Ludwig Kahlbaum (1828 1899) to denote a hallucination arising in … Dictionary of Hallucinations
television-induced hallucination — The notion of television induced hallucination refers to a type of hallucination uniquely provoked by television viewing. This type of hallucination is believed to be extremely rare. The first case report of hallucinations co occurring with… … Dictionary of Hallucinations
benign hallucination — Also referred to as non morbid hallucination. The term benign hallucination is indebted to the Latin words bene (good) and gignere (to entail, to bring forth). It was introduced in 1960 by the American psychiatrist Gordon For rer to denote a… … Dictionary of Hallucinations
complex hallucination — A term used to denote a phenomenologically rich and often well organized type of hallucination that is confined to a single sensory modality. Theoretically, complex hallucinations may present in any of the sensory modalities. It is customary,… … Dictionary of Hallucinations
autoscopic hallucination — Also referred to as external autoscopic hallucination, specular hallucination, mirror hallucination, deuteroscopic hallucination, and visual phantom double. The expression autoscopic hallucination can be traced to the Greek words autos (self)… … Dictionary of Hallucinations
geometric hallucination — Also known as geometrical hallucination, geometric visual hallucination, and optogeometric illusion. All four terms can be traced to the Greek noun geometria, which means land surveying. They are used to denote a * formed visual hallucination… … Dictionary of Hallucinations