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Longitudinal assessment of retinal and visual pathway electrophysiology and structure after high altitude exposure.
Graefes Arch Clin Exp Ophthalmol
January 2025
Institute of Brain Diseases and Cognition, School of Medicine, Xiamen University, Xiamen, 361102, Fujian, China.
High altitude (HA) exposure induces impairments in visual function. This study was designed to dynamically observe visual function after returning to lowland and elucidate the underlying mechanism by examining the structure and function of retina and visual pathway. Twenty-three subjects were recruited before (Test 1), and one week (Test 2) and three months (Test 3) after their return from HA (4300 m) where they resided for 30 days.
View Article and Find Full Text PDFPattern reversal chromatic VEPs like onsets, are unaffected by attentional demand.
Vis Neurosci
December 2024
Department of Psychology, University of Nevada, Reno, Reno, NV, USA.
Attention has been shown to modulate the visual evoked potential (VEP) recorded to reversing achromatic patterns. However, the chromatic onset VEP appears to be robust to attentional shifts. Functional magnetic resonance imaging (fMRI) responses to both chromatic and achromatic reversing patterns are also affected by attention.
View Article and Find Full Text PDFModel based fitting of pattern reversal visually evoked potentials provides a reliable characterization of waveform components.
Biomed Signal Process Control
January 2025
Children's Hospital of Philadelphia, 3501 Civic Center Blvd, Philadelphia PA, 19104.
Objective: To introduce a novel approach to analyzing pattern reversal visual evoked potentials (prVEPs) using a difference-of-gammas model-based fitting method.
Methods: prVEP was recorded from uninjured youth ages 11-19 years during pre- or postseason sports evaluation. A difference-of-gammas model fit was used to extract the amplitude, peak time, and peak width of each of four gamma components.
Characteristics of autosomal dominant WFS1-associated optic neuropathy and its comparability to OPA1-associated autosomal dominant optic atrophy.
Sci Rep
October 2024
Department of Ophthalmology, University Medical Center Utrecht, Utrecht, The Netherlands.
This study aims to describe the ophthalmic characteristics of autosomal dominant (AD) WFS1-associated optic atrophy (AD WFS1-OA), and to explore phenotypic differences with dominant optic atrophy (DOA) caused by mutations in the OPA1-gene. WFS1-associated diseases, or 'wolframinopathies', exhibit a spectrum of ocular and systemic phenotypes, of which the autosomal recessive Wolfram syndrome has been the most extensively studied. AD mutations in WFS1 also cause various phenotypical changes including OA.
View Article and Find Full Text PDFArticle Synopsis
- Visual evoked potential (VEP) is a non-invasive method used to identify visual system abnormalities, particularly useful for young children who can't communicate visual issues.
- The study involved 60 schoolchildren aged 7-12, analyzing VEPs to assess the optic pathway by measuring the latency and amplitude of specific components (P100, N70, N155).
- Results indicated that a significant portion of children had extended P100 latency, suggesting possible underlying visual disorders, while those with normal VEPs had a healthy visual pathway.
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