Domitrz Izabela
Klinika Neurologii Akademii Medycznej w Warszawie.
Neurol Neurochir Pol. 2007 Mar-Apr;41(2):181-7.
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.
最常见的偏头痛先兆类型是典型偏头痛先兆，其中最常出现的先兆类型是视觉现象。视觉先兆的类型可能有所不同。闪烁暗点、堡垒样曲折光带（视幻觉）、视觉图像碎片化是视觉先兆中的典型幻觉。典型的光环现象的视觉幻觉被视为视觉性偏头痛先兆症状。光环现象的额外边缘通常出现在物体的感知图像周围。光环现象与视力丧失以及基本几何幻觉的存在密切相关。它围绕着人的头部、肩部、手部或身体。虚幻分裂可与视觉图像碎片化以及几何幻觉或镶嵌幻觉相鉴别。偏头痛先兆的发病机制尚不清楚。偏头痛先兆的可能原因可能是皮质扩散性抑制（CSD）和脑灌注不足。离子变化、三叉神经激活和神经肽释放似乎是偏头痛先兆发作期间CSD的继发表现。在本文中，展示并讨论了偏头痛患者所经历的视觉先兆图片。
