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Visual Auras, Hallucinations, and Illusions
2019Visual hallucinations are perceptions that occur in the absence of a corresponding external visual stimulus, whereas visual illusions are misinterpretations of an external visual stimulus. Migraine visual aura is a common cause of transient visual hallucinations. Similar symptoms can occur in patients who have occipital lesions or as a manifestation of
Matthew J. Thurtell, Robert L. Tomsak
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Effects of Visual Pathway Lesions on the Visual Aura of Migraine
Cephalalgia, 2009The aim was to to determine if the visual aura of migraine is altered by disease of the afferent visual pathways and if visual aura changes are associated with pre- or postgeniculate lesions. Functional neuroimaging during migraine demonstrates primary visual/extrastriate cortex as an anatomical substrate of visual aura. Neuro-ophthalmological records (
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Visual Cortex Excitability in Migraine With and Without Aura
Headache: The Journal of Head and Face Pain, 2001Objectives.—Previous research using transcranial magnetic stimulation has produced equivocal findings concerning thresholds for the generation of visual phosphenes in migraine with aura. These studies were methodologically varied and did not systematically address cortical excitability in migraine without aura.
Mulleners, Wim M. +4 more
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Vector analysis of visual evoked potentials in migraineurs with visual aura
Clinical Neurophysiology, 2003To assess the capability of vector analysis of visual evoked potentials (VEPs) for revealing alterations in posterior visual pathways in migraineurs with visual aura.VEPs to pattern reversal (PR) and LED goggle stimulation were obtained in 23 patients suffering from migraine with visual aura, in an orthogonal Fpz-Oz and T3-T4 montage and displayed as a
P, Coutin-Churchman +1 more
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Illusory Splitting as Visual Aura Symptom in Migraine
Cephalalgia, 2000Illusory splitting was illustrated as a visual migraine aura symptom in six of 562 Migraine Art pictures. In this type of illusion, objects or persons appear to be split, along fracture lines of varying form and orientation, into two or more parts that may be displaced and separated from each other. The illusion is strongly associated with the presence
K, Podoll, D, Robinson
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[Migraine with visual aura: visual aura pictured by the patient].
Neurologia i neurochirurgia polska, 2007The 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.
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Persistent aura, visual snow, and other visual symptoms
In neurology practice, it is common to encounter a variety of visual complaints. Historically, in the absence of known ocular pathology, epilepsy, or insult to the central nervous system, positive symptoms were assumed to be migrainous in origin. This assumption was sometimes made even in the absence of a history of migraine.Carrie E, Robertson, Kathleen B, Digre
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Visual Dysfunction in Migraine with Aura
Cephalalgia, 1995N, Legg, N, Khalil
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