Dysfunction of the magnocellular stream in Alzheimer's disease evaluated by pattern electroretinograms and visual evoked potentials
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چکیده
منابع مشابه
Visual evoked cortical potentials and pattern electroretinograms in Parkinson's disease and control subjects.
Parkinson's disease patients have been shown to have abnormal visually evoked cortical potentials (VEPs) to pattern stimulation. Whereas dopamine is not an important neurotransmitter in the central visual pathways, the retina is rich in dopamine and, together with previous animal and human studies, this suggests that the abnormal VEPs in Parkinson's disease patients may be due to a biochemical ...
متن کاملClinical ability of pattern electroretinograms and visual evoked potentials in detecting visual dysfunction in ocular hypertension and glaucoma.
OBJECTIVE To assess the presence of normal or abnormal pattern electroretinogram (PERG) and visual evoked potential (VEP) responses in patients with ocular hypertension or open-angle glaucoma (OAG). DESIGN Retrospective, cross-sectional, case-control study. PARTICIPANTS Eighty normal control subjects (mean age, 51.77+/-6.04 years; 80 eyes), 68 ocular hypertension patients (mean age, 51.58+/...
متن کاملEffect of decreased retinal illumination on simultaneously recorded pattern electroretinograms and visual-evoked potentials.
Sixteen normal subjects and three patients with optic neuritis were studied to determine the effect of decreased retinal illumination on simultaneously recorded pattern electroretinograms (PERG) and visual-evoked potentials (VEP). Using neutral-density filters (NDF), it was found that linear modeling is an excellent fit for VEP/PERG amplitudes and latencies as log functions of retinal illuminat...
متن کاملPattern Visual Evoked Potentials in Dyslexic Children
PURPOSE This study aimed to compare pattern visual evoked potential (PVEP) components in dyslexic and normal children. METHODS This cross-sectional analytic study recruited 72 children, including 36 dyslexic and 36 normal participants aged 8-12 years. Visual examinations included measurement of distance visual acuity, refraction, and PVEP components of amplitudes and latencies with two differ...
متن کاملPattern visual evoked potentials in hyperthyroidism.
Pattern reversal visual evoked potentials (VEPs) have been elicited in 16 female hyperthyroid patients before and after treatment and compared with those from a similar group of age and sex matched control subjects. No effect on latency was seen, and although larger amplitude values were noted in the thyrotoxic group these too were not significant. We would conclude that hyperthyroidism per se ...
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ژورنال
عنوان ژورنال: Brain Research Bulletin
سال: 2010
ISSN: 0361-9230
DOI: 10.1016/j.brainresbull.2010.04.001