Clinical characterization of "visual snow" (Positive Persistent Visual Disturbance)
نویسندگان
چکیده
منابع مشابه
Visual snow--persistent positive visual phenomenon distinct from migraine aura.
Patients with visual snow complain of uncountable flickering tiny dots in the entire visual field similar to the view of a badly tuned analogue TV channel (TV snow). The symptoms are often continuous and can persist over years. This condition is grouped among the persistent visual phenomena in migraine, although it clinically presents a unique entity distinct from persistent migraine aura or mi...
متن کامل'Visual snow' - a disorder distinct from persistent migraine aura.
Patients with 'visual snow' report continuous tiny dots in the entire visual field similar to the noise of an analogue television. As they frequently have migraine as a comorbidity with ophthalmological, neurological and radiological studies being normal, they are offered various diagnoses, including persistent migraine aura, post-hallucinogen flashback, or psychogenic disorder. Our aim was to ...
متن کاملEffects of visual deprivation on synaptic plasticity of visual cortex
TBS (Theta Burst Stimulation) and PBs (Primed Bursts) are among effective tetanic stimulations for induction of LTP in hippocampus. Recent studies have indicated that TBS is effective in LTP induction in layer III synapses of neocortex, only if applied to layer IV. However, the possibility of neocortical LTP induction using PBs, has not yet been investigated. Sensory deprivation greatly influ...
متن کاملHeadache and visual disturbance.
An 1 -year-old boy presented with enteric fever (titres for Salmonella typhi positive as TH 640 andTO 320). He was prescribed pefloxacin 200 mg 12 hourly for 14 days. After regression offever in five days, he complained ofan occipitonuchal headache ofincreasing severity with vomiting and diplopia. No H/O ear discharge, visual symptoms or seizures. Clinical examination revealed an alert young bo...
متن کاملVisual snow: A thalamocortical dysrhythmia of the visual pathway?
In this paper we review the visual snow (VS) characteristics of a case cohort of 32 patients. History of symptoms and associated co-morbidities, ophthalmic examination, previous investigations and the results of intuitive colourimetry were collected and reviewed. VS symptoms follow a stereotypical description and are strongly associated with palinopsia, migraine and tinnitus, but also tremor. T...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Headache and Pain
سال: 2013
ISSN: 1129-2369,1129-2377
DOI: 10.1186/1129-2377-14-s1-p132