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Scintillating scotoma is a common visual aura that was first described by 19th-century physician Hubert Airy (1838–1903). Originating from the brain, it may precede a migraine headache , but can also occur acephalgically (without headache), also known as visual migraine or migraine aura. [ 4 ]
Scintillating scotoma is a common visual aura in migraine. [4] Less common, but important because they are sometimes reversible or curable by surgery , are scotomata due to tumors such as those arising from the pituitary gland , which may compress the optic nerve or interfere with its blood supply.
Photopsia; This is an approximation of the zig-zag visual of a scintillating scotoma as a migraine aura. It moves and vibrates, expanding and slowly fading away over the course of about 20 minutes.
An aura is a perceptual disturbance experienced by some with epilepsy or migraine.An epileptic aura is actually a minor seizure. [1]Epileptic and migraine auras are due to the involvement of specific areas of the brain, which are those that determine the symptoms of the aura.
New research suggests that adding higher-intensity walking to physical therapy could help improve stroke recovery. Stroke survivors in a progressive-intensity walking rehabilitation program showed ...
Distribution of rods and cones along a line passing through the fovea and the blind spot of a human eye [1]. A blind spot, scotoma, is an obscuration of the visual field.A particular blind spot known as the physiological blind spot, "blind point", or punctum caecum in medical literature, is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the ...
The aura phase of migraine can occur with or without a headache. Ocular or retinal migraines happen in the eye, so only affect the vision in that eye, while visual migraines occur in the brain, so affect the vision in both eyes together. Visual migraines result from cortical spreading depression and are also commonly termed scintillating scotoma.
The scintillating scotoma of migraine in humans may be related to the neurophysiologic phenomenon termed the spreading depression of Leão. [13] Increased extracellular potassium ion concentration and excitatory glutamate contribute to the initiation and propagation of cortical spreading depression, which is the underlying cause of migraine ...