نتایج جستجو برای: visual evoked potentials

تعداد نتایج: 483133  

Journal: :iranian journal of medical sciences 0
mohammad reza talebnejad poostchi ophthalmology research center, shiraz university of medical sciences, shiraz, iran saeedeh hosseinmenni poostchi ophthalmology research center, shiraz university of medical sciences, shiraz, iran and department of optometry, iran university of medical sciences, tehran, iran ebrahim jafarzadehpur department of optometry, iran university of medical sciences, tehran, iran ali  mirzajani department of optometry, iran university of medical sciences, tehran, iran enayatollah  osroosh department of optometry, mashhad university of medical sciences, mashhad, iran

background: we compared the wave amplitude of visually evoked potential (vep) between patients with esotropic and anisometropic amblyopic eyes and a normal group. methods: the wave amplitude of vep was documented in 2 groups of persons with amblyopia (15 with esotropia and 28 with anisometropia) and 1 group of individuals with normal visual acuity (n, 15). the amplitude of p100 was recorded mon...

Journal: :بینا 0
علیرضا دهقانی ar dehghani اصفهان- خیابان صفه- بیمارستان الزهرا وحید شایگان نژاد v shaygannejad اصفهان- خیابان صفه- بیمارستان الزهرا فریبرز فردوسی f ferdosi اصفهان- خیابان صفه- بیمارستان الزهرا آذین شایگان فر a shayganfar

purpose: to determine the clinical and paraclinical features of multiple sclerosis (ms) in patients presenting for the first time with optic neuritis. methods:  in this descriptive study, 35 patients with clinical evidence of optic neuritis were enrolled. our evaluation included a neurological examination, visual evoked potentials (vep), brainstem-auditory evoked potentials (baep), and brain mr...

  Effects of visual deprivation on the induction of epileptiform activity were studied in layer II/III of mature rat primary visual cortex. Field potentials were evoked by stimulation of layer IV in slices from control and dark-reared (OR) rats. Picrotoxin (PTX)-induced epileptic activity was characterized by spontaneous and evoked epileptic field potentials (EFPs). The results showed that OR s...

Journal: :بینا 0
علیرضا جعفری a jafari international branch, shahid beheshti university of medical sciences, tehran, iranدانشگاه علوم پزشکی تهران- مرکز تحقیقات توانبخشی- بخش الکتروفیزیولوژی علی میرزاجانی a mirzajani rehabilitation research center tehran university of medical sciences, tehran, iranدانشگاه علوم پزشکی تهران- مرکز تحقیقات توانبخشی- بخش الکتروفیزیولوژی محمد آقازاده امیری m amiri school of rehabilitation shahid beheshti university of medical sciences, tehran, iranدانشگاه علوم پزشکی تهران- مرکز تحقیقات توانبخشی- بخش الکتروفیزیولوژی

purpose: to evaluate the effect of vertical prism induced stress on binocular visual evoked potentials. methods: using checkerboard stimulus patterns in two spatial frequencies (sfs) of 0.48 cpd as a low sf and 2.18 cpd as a moderate sf reversing with temporal frequency of 4 hz, the effect of increasing visual stress using vertical prisms of 0, 1, 2 and 3 prism diopters on binocular visual evok...

Journal: :journal of current ophthalmology 0
جواد هرویان javad heravian علی اکبر صابرمقدم ali akbar saber moghaddam مرضیه نجاران marzieh najjaran عباس عظیمی abbas azimi هادی استادی مقدم hadi ostadimoghaddam عباسعلی یکتا abbasali yekta محسن فروغی پور

purpose : to evaluate the efficacy of pattern visual evoked potentials (pvep), standard automated perimetry (sap), short-wavelength automated perimetry (swap), contrast sensitivity (cs), stereoacuity testing in detecting subclinical visual impairment in visually asymptomatic patients with multiple sclerosis (ms) and no history of optic neuritis methods : twenty-seven eyes of 27 patients (7 male...

Journal: :Journal of Neurology, Neurosurgery & Psychiatry 1983

Ali  Mirzajani Ebrahim Jafarzadehpur, Enayatollah  Osroosh Mohammad Reza Talebnejad, Saeedeh Hosseinmenni

Background: We compared the wave amplitude of visually evoked potential (VEP) between patients with esotropic and anisometropic amblyopic eyes and a normal group.Methods: The wave amplitude of VEP was documented in 2 groups of persons with amblyopia (15 with esotropia and 28 with anisometropia) and 1 group of individuals with normal visual acuity (n, 15). The amplitude of P100 was recorded mono...

Journal: :The Journal of Kansai Medical University 1973

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