Document Detail

A method for investigating the temporal dynamics of local neuroretinal responses.
MedLine Citation:
PMID:  17913236     Owner:  NLM     Status:  MEDLINE    
Visual sensitivity improves with prolonged exposure to light. Global neuroretinal responses increase, but little is known about the dynamics of local retinal responses over brief time intervals after changes in light level. This study applies the time-slice multifocal electroretinogram (TS mfERG) paradigm for the measurement of local electrical responses of the human eye over brief time intervals. Sixty-one, localised retinal areas were assessed over 25 degrees of the visual field. Cone-mediated contributions to the time-slice waveform were established. The time-slice mfERG waveforms were similar in shape and timing for pre- and post-photopigment bleach conditions after saturation of rod-mediated responses, suggesting there was no rod-mediated intrusion in the waveform. The temporal dynamics of the mfERG components show that N1P1 amplitudes decrease with each successive time-slice probe, with larger amplitude responses in the central retina compared to nasal and temporal retina. The time-slice mfERG waveform is a technique for assessing the temporal dynamics of cone-generated neural responses over time. The data are interpreted in terms of the vascular supplies and lower-level visual adaptation mechanisms.
Beatrix Feigl; Andrew J Zele
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-08-19
Journal Detail:
Title:  Journal of neuroscience methods     Volume:  167     ISSN:  0165-0270     ISO Abbreviation:  J. Neurosci. Methods     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2007-12-17     Completed Date:  2008-04-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7905558     Medline TA:  J Neurosci Methods     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  207-12     Citation Subset:  IM    
Institute of Health and Biomedical Innovation and the School of Optometry, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane, 4059 Qld, Australia.
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MeSH Terms
Adaptation, Ocular / physiology*
Analysis of Variance
Photic Stimulation / methods
Reaction Time
Retina / physiology*
Visual Fields / physiology*

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