Improved measurement of intersession latency in mfVEPs

Authors
Santiago Rodrigo, Luis deUniversity of Alcalá Author; Fernández Rodríguez, Alfredo JoséUniversity of Alcalá Author; Blanco, R.; Pérez Rico, María ConsueloUniversity of Alcalá Author; Rodríguez Ascariz, José ManuelUniversity of Alcalá Author; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/49178
DOI: https://doi.org/10.1007/s10633-014-9438-x
ISSN: 0012-4486
Publisher
Springer
Date
2014-05-07
Affiliation
Universidad de Alcalá. Departamento de Electrónica
Funders
Ministerio de Ciencia e Innovación
Bibliographic citation
Santiago, L. de et al. 2014, "Improved measurement of intersession latency in mfVEPs", Documenta Ophthalmologica, vol. 129, no. 1, pp. 65-69.
Keywords
Multifocal visual-evoked potential
Relative latencies
Cross-correlation
Visual pathway
Project
info:eu-repo/grantAgreement/MICINN//TEC2011-26066/ES/ANALISIS AVANZADO DE LAS SEÑALES DE LOS POTENCIALES EVOCADOS MULTIFOCALES Y DE LA ELECTRORRETINOGRAFIA MULTIFOCAL APLICADOS AL DIAGNOSTICO DE LAS NEUROPATIAS OPTICAS/
FIS PI11/00533 (Ministerio de Ciencia e Innovación)
RETICS RD12/0034/0006 (Ministerio de Ciencia e Innovación)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
https://doi.org/10.1007/s10633-014-9438-x
Rights
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Access rights
info:eu-repo/semantics/openAccess
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Abstract
Purpose: The purpose of the study is to present a method (Selfcorr) by which to measure intersession latency differences between multifocal VEP (mfVEP) signals. Methods: The authors compared the intersession latency difference obtained using a correlation method (Selfcorr) against that obtained using a Template method. While the Template method cross-correlates the subject’s signals with a reference database, the Selfcorr method cross-correlates traces across subsequent recordings taken from the same subject. Results: The variation in latency between intersession signals was 0.8 ± 13.6 and 0.5 ± 5.0 ms for the Template and Selfcorr methods, respectively, with a coefficient of variability C V_TEMPLATE = 15.83 and C V_SELFCORR = 5.68 (n = 18, p = 0.0002, Wilcoxon). The number of analyzable sectors with the Template and Selfcorr methods was 36.7 ± 8.5 and 45.3 ± 8.7, respectively (p = 0.0001, paired t test, two tailed). Conclusions: The Selfcorr method produces smaller intersession mfVEP delays and variability over time than the Template method.
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