- olfactory aura
- The term olfactory aura comes from the Latin words ol(e)facere (to smell) and aura (breeze, smell). It is used to denote a type of *aura manifesting itself in the form of an * olfactory hallucination or * parosmia (i.e. an olfactory *illusion). The olfactory aura has been described since ancient times. It is mentioned in combination with a * gustatory aura, occurring in the context of epilepsy, by the classical physician Aretaeus of Cappadocia (c. AD 150). Etiologically, the olfactory aura is associated primarily with paroxysmal neurological disorders such as migraine and epilepsy. Pathophysiologically, it is associated primarily with aberrant neuronal discharges in the uncinate gyrus. The prevalence of olfactory aurae in individuals with epilepsy varies from 0.9 to 16%. This relatively wide range may be due to differences in population sampling and clinical rating. Phenomenologically, olfactory aurae can be indistinguishable from * gustatory aurae because of the close relation that exists between the senses of taste and smell. When olfactory hallucinations or parosmia occur in conjunction with hallucinations in any of the other sensory modalities, or with alterations in the sense of familiarity, they can under certain conditions be designated as a * psychic aura.ReferencesHallen, O. (1982). Dreamy states, olfaktorische und Gesmackshalluzinationen epileptischer Genese.In: Halluzinationen bei Epilepsien und ihre Differentialdiagnose.Editedby Karbowski, K. Bern: Verlag Hans Huber.Lüders, H., Acharya, J., Baumgartner, C., Ban-badis, S., Bleasel, A., Burgess, R., Dinner, D.S., Ebner, A., Foldvary, N., Geller, E., Hamer, H., Holthausen, H., Kotagal, P., Morris, H., Meencke, H.J., Noachtar, S., Rosenow, F., Sakamotot, A., Steinhoff, B.J., Tuxhorn, I., Wyllie, E. (1998). Semiological seizure classification. Epilepsia, 39, 1006-1013.Mauguière, F. (1999). Scope and presumed mechanisms of hallucinations in partial epileptic seizures. Epileptic Disorders, 1, 81-91.
Dictionary of Hallucinations. J.D. Blom. 2010.
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aura — Also known as aural phenomenon and psychical state. The term aura is Greek for wind, breeze, or smell. Its introduction into medicine has been attributed to the Greek physician Pelops, the master of the great Galen of Pergamum (129 c. 216 AD) … Dictionary of Hallucinations
olfactory hallucination — Also known as phantosmia, phantom smell, and hallucination of smell. The term olfactory hallucination is indebted to the Latin verb ol(e)facere, which means to smell. Using source localization as a guiding principle, olfactory hallucinations… … Dictionary of Hallucinations
Aura — A premonition. There is often an aura before a migraine or a grand mal seizure. The aura, a symptom of brain malfunction, may consist of flashing lights, a gleam of light, blurred vision, an odor, the feeling of a breeze, numbness, weakness, or… … Medical dictionary
gustatory aura — The term gustatory aura comes from the Latin noun gustus (taste) and the Greek noun aura (wind, breeze, smell). It used to denote a type of *aura that manifests itself in the form of a *gustatory hallucination or *illusion. The gustatory aura… … Dictionary of Hallucinations
epilepsy and hallucinations — The term epilepsy comes from the Greek verb epilambanein (to attack). It refers to a neurological disorder characterized by recurrent seizures. The introduction of the term epilepsy is generally attributed to the Persian physician and… … Dictionary of Hallucinations
ictal hallucination — The term ictal hallucination is indebted to the Latin noun ictus, which means blow or thrust. In neurology the term ictus is used to denote a paroxysmal epileptic seizure. The term ictal hallucination refers to a hallucination occurring in the … Dictionary of Hallucinations
parosmia — Also known as paraosmia and dysosmia. The term parosmia comes from the Greek words para (beside, near, resembling, accessory to, beyond, apart from, abnormal) and osmè (smell, stink, fragrant, odour, scent, perfume). It translates loosely as a … Dictionary of Hallucinations
smell — I (New American Roget s College Thesaurus) v. scent; stink; sniff, snuff, inhale; detect, nose out. See odor, malodorousness. II (Roget s IV) n. 1. [A pleasant smell] Syn. fragrance, odor, scent, perfume, exhalation, redolence, essence, aroma,… … English dictionary for students
smell — I. verb (smelled or smelt; smelling) Etymology: Middle English Date: 12th century transitive verb 1. to perceive the odor or scent of through stimuli affecting the olfactory nerves ; get the odor or scent of with the nose 2. to detect or become… … New Collegiate Dictionary
Migraine — This article is about the disorder. For other uses, see Migraine (disambiguation). Migraine Classification and external resources The pain of a migraine headache can be debilitating. ICD 10 … Wikipedia