نتایج جستجو برای: multifocal visual evoked potential

تعداد نتایج: 1436626  

B Varavipour N. Ashjazadeh,

Background: Visual evoked potential (VEP) is regarded as a useful, reliable and non-invasive technique for the diagnosis of lesions in the optic pathway.  This technique was used to investigate visual function in migraine.   Materials and Methods: 53 migraine patients (27 migraine cases with aura and 26 common migraine cases) and 55 controls were prospectively enrolled in this study.  Visual ev...

Ali Kasiri Amir Daniaee Parvin Armiun Seyed Mahmoud Latifi

Introduction: Glaucoma is considered as a major cause of irreversible vision loss, worldwide. Glaucoma includes a diverse ophthalmopathies characterized by attenuating the neural and connective tissue segments and eventually progression of specific patterns of visual dysfunction. Currently, perimetry is known as the most accurate diagnostic method in glaucoma and its follow up...

Journal: :iranian journal of medical sciences 0
n. ashjazadeh electroneurodiagnostic clinic, department of neurology, school of medicine, shiraz university of medical sciences, shiraz, iran b varavipour electroneurodiagnostic clinic, department of neurology, school of medicine, shiraz university of medical sciences, shiraz, iran

background: visual evoked potential (vep) is regarded as a useful, reliable and non-invasive technique for the diagnosis of lesions in the optic pathway.  this technique was used to investigate visual function in migraine.    materials and methods: 53 migraine patients (27 migraine cases with aura and 26 common migraine cases) and 55 controls were prospectively enrolled in this study.  visual e...

and Mohammad Saber Hashemi Sara Hashemi

Introduction: Visual evoked potentials contain certain diagnostic information which have proved to be of importance in the visual systems functional integrity. Due to substantial decrease of amplitude in extra macular stimulation in commonly used pattern VEPs, differentiating normal and abnormal signals can prove to be quite an obstacle. Due to developments of use of machine l...

Journal: :Vision Research 2001
Francesco Di Russo Donatella Spinelli M.Concetta Morrone

This study investigated the effect of attention on the contrast response curves of steady-state visual evoked potentials (VEPs) to counter-phased sinusoidal gratings. The 1 cyc/deg gratings were modulated either in luminance or chromaticity (equiluminant red-green). The luminance grating counter-phased at 9 Hz (to favour activation of the magno-cellular system), and the chromatic grating at 2.5...

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