- amaurosis fugax and visual hallucinations
- The noun amaurosis is Greek for darkening or loss of vision; the adjective fugax comes from the Latin noun fuga, or flight. The term amau-rosis fugax translates loosely as transient blindness. It is used to denote a sudden, painless, temporary loss of vision that can be either partial or total in nature. This loss of vision typically lasts from a few seconds to some minutes. Pathophysiologically, amaurosis fugax has traditionally been classified as a variant of transient ischaemic attack (TIA). Etiologically, it is associated with a variety of embolic, haemodynamic, ocular, and neurological conditions. Amaurosis fugax occurring in the context of epilepsy is referred to with the term " post-ictal amauro-sis. It has been speculated that many of the so-called idiopathic cases of amaurosis fugax are attributable to local vasospasms. Although rare, amaurosis fugax can be accompanied by " visual hallucinations of varying complexity. In a group of 31 individuals with giant cell arteritis, the Israelian physicians Gideon Nesher et al. found 5 subjects with permanent visual loss complicated by visual hallucinations and 1 with amaurosis fugax complicated by visual hallucinations. Such visual hallucinations occurring in combination with visual impairment have also been referred to as " ophthalmopathic hallucinations.ReferencesBacigalupi, O.D. (2006). Amaurosis fugax -A clinical review. Internet Journal of Allied Health Sciences and Practice, 4, 1-6.Nesher, G., Nesher, R., Rozenman, Y., Sonnenblick, M. (2001). Visual hallucinations in giant cell arteritis: Association with visual loss. Journal of Rheumatology, 28, 2046-2048.
Dictionary of Hallucinations. J.D. Blom. 2010.
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amaurosis and visual hallucinations — In Greek, the noun amaurosis refers to a darkening or loss of vision. In present day biomedicine, it is used to denote a type of visual loss that is not due to intraocular pathology. A congenital type of amaurosis is known as Leber s… … Dictionary of Hallucinations
temporal arteritis and hallucinations — Temporal arteritis is also known as giant cell arteritis (GCA). Both names are used to denote a vasculitis which affects (especially) the large and medium sized arteries of the head. The name temporal arteritis refers to the temporal artery,… … Dictionary of Hallucinations
postictal amaurosis — A term used to denote avariantof * amaurosis fugax (i.e. transient blindness) which is attributable to an epileptic seizure. Postictal amaurosis can affect the visual field in whole or in part. In the majority of cases, it affects only one of… … Dictionary of Hallucinations
Charles Bonnet syndrome — (CBS) The eponym Charles Bonnet syndrome (CBS) refers to the Swiss naturalist and philosopher Charles Bonnet (1720 1792). It was introduced in 1936 by the Swiss neurologist Georges de Mor sier (1894 1982) to denote a hallucinatory state or… … Dictionary of Hallucinations
migraine aura — The term migraine comes from the Old English megrim, which is in turn indebted to the Greek noun hèmikranion (meaning half the skull). The introduction of the term hèmikranion is attributed to the classical physician Galen of Pergamum, born as … Dictionary of Hallucinations
Hildegard of Bingen — (1098 1179) Also known as St. Hildegard. A German Benedictine abbess and mystic whose advanced social and theological views are based on a series of visions she experienced from the age of 3. On the basis of her own portrayals of these visions … Dictionary of Hallucinations
obscuration — The term obscuration comes from the Latin adjective obscurus, which means dark. It translates as darkening . The term is used to denote a transient loss of visual perception. Such losses of visual perception typically last no longer than a few … Dictionary of Hallucinations
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