[Migraine with visual aura: visual aura pictured by the patient].
The most frequent type of migraine aura is the typical one in which the most frequently occurring aura type are visual phenomena. Types of visual aura may be different. Scintillating scotoma, fortification zigzags (teichopsiae), fragmentation of the visual image are typical illusions in visual aura. The visual illusion of a typical corona phenomenon was represented as a visual migraine aura symptom. The extra edges of the corona phenomenon are commonly seen around the perceptual images of objects. The corona phenomenon is strongly associated with visual loss and the presence of elementary geometric illusions. It is surrounding a person's head, shoulders, hands, or body. Illusory splitting can be differentiated from the fragmentation of visual images and from the geometric illusion or mosaic illusion. The pathogenesis of migraine aura remains unclear. The probable cause of migraine aura may be cortical spreading depression (CSD) and cerebral hypoperfusion. Ionic changes, activation of trigeminal nerve and release of neuropeptides seem to be secondary to CSD during the attack of migraine aura. In present article the pictures of visual aura experienced by migraine patient are presented and discussed.
Domitrz
Izabela
I
Klinika Neurologii Akademii Medycznej w Warszawie. domitrz@amwaw.edu.pl
D013181:Cortical Spreading Depression; D006801:Humans; D008297:Male; D008875:Middle Aged; D020325:Migraine with Aura / Q000503:physiopathology*