نتایج جستجو برای: multifocal visual evoked potential

تعداد نتایج: 1436626  

2011
Saemi Park Sang Hyouk Park Jee Ho Chang Young-Hoon Ohn

PURPOSE To introduce the clinical utility of the absolute value of the reconstructed waveform method in the analysis of multifocal visual evoked potential (mfVEP). METHODS The mfVEP with 4-channel recording was performed using RETIscan® on 10 eyes of 10 normal subjects. Amplitudes were obtained from ring-shaped 6 areas and 4 sectors. The best visual evoked potential (VEP) response method and ...

Journal: :Vision Research 2002
William Seiple Colleen Clemens Vivienne C Greenstein Karen Holopigian Xian Zhang

To determine the manner in which attention is distributed among numerous locations in the visual space, we used a multifocal recording technique that allowed simultaneous recordings of evoked cortical activity from 12 visual field areas out to 23.6 degrees. We found that multifocal visual evoked potential (mfVEP) amplitude was larger when a region of visual space was attended than when it was n...

2011
Andrea Pálffy

in patients with nonarteritic anterior ischemic optic neuropathy. Differential diagnosis of concentric visual field defects using electrophysiological methods. patterns of cone degeneration in retinitis pigmentosa with concentric narrowing of the visual field. electroretinograms and visual evoked potentials in retinitis pigmentosa. Documenta of multifocal electroretinograms obtained under monoc...

Journal: :Japanese journal of ophthalmology 2002
Yasuhiro Kikuchi Masaru Yoshii Kenji Yanashima Toshio Enoki Tetsuyoshi Ide Fumito Sakemi Shigekuni Okisaka

PURPOSE To investigate whether the multifocal visual evoked potential (mVEP) is dependent on the electrode position, and to confirm the reproducibility of the mVEP. METHODS The mVEPs were recorded using the Veris III system with two different bipolar electrode settings. In Position 1, electrodes were placed at equal distances in vertical alignment 2 cm above and below the inion. In Position 2...

Journal: :بینا 0
ابراهیم جعفرزاده پور e jafarzadehpour تهران- میرداماد- میدان محسنی- خیابان شهید شاه نظری- دانشکده علوم توانبخشی- گروه بینایی سنجی

purpose: comparison of the results of visual evoked potential (vep) in time domain and frequency domain between multiple sclerosis (ms) suspected patients and normal indivisuals. method: eleven ms suspected patients with normal visual findings and 20 normal individuals were tested by vep. results were compared between two groups. results: the time domain results showed no significant difference...

Journal: :journal of current ophthalmology 0
محمد ریاضی اصفهانی mohammad riazi esfahani زهرا اعلمی هرندی zahra aalami harandi سامان کیومهر saman kiumehr افسانه غلامی afsaneh gholmi عبدالرضا طبسی abdolreza tabasi نیلوفر پیری niloofar piri احمد میرشاهی

purpose : to evaluate the effects of memantine on improving visual function in patients with acute nonarteritic anterior ischemic optic neuropathy (naion) methods : this was a prospective, double masked, randomized, clinical trial. the study involved 47 subjects with unilateral naion of less than 8 weeks duration. eligible patients were randomly allocated to take either memantine tablets (5 mg ...

Journal: :journal of current ophthalmology 0
زهرا اعلمی هرندی zahra aalami-harandi افسانه غلامی afsaneh gholami محمد ریاضی اصفهانی mohammad riazi-esfahani عبدالرضا طبسی abdolreza tabasi نیلوفر پیری niloofar piri احمد میرشاهی ahmad mirshahi مهدی نیلی احمدآبادی

purpose : evaluation of efficacy of memantine (n-methyl-d-aspartate receptor antagonist) on visual function of patients with acute non-arteritic ischemic optic neuropathy (naion). methods : the study was conducted as interventional case series from november 2005 through november 2006 in farabi eye hospital . twenty-two patients with acute naion of less than 8 weeks duration entered the study. m...

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