Age does not necessarily influence latency of event-related potentials

M. Westermann; I. W. Husstedt; A. Okegwo; S. Evers

doi:10.1055/s-0038-1627735

Nervenheilkunde, Inhaltsverzeichnis

Nervenheilkunde 2014; 33(10): 723-727
DOI: 10.1055/s-0038-1627735

Originalarbeit

Schattauer GmbH

Age does not necessarily influence latency of event-related potentials

Alter beeinflusst nicht notwendigerweise die Latenzen von ereigniskorrelierten Potenzialen

Authors

M. Westermann

¹Department of Neurology, University of Münster
I. W. Husstedt

¹Department of Neurology, University of Münster
A. Okegwo

¹Department of Neurology, University of Münster
S. Evers

¹Department of Neurology, University of Münster

²Department of Neurology, Krankenhaus Lindenbrunn, Coppenbrügge

Abstract

Summary

Event-related potentials (ERP) are regarded as age dependent. However, it is not known whether this is an intrinsic property of ERP or an extrinsic factor. We designed a setting in which ERP were evoked using a modified oddball paradigm with highly differentiable and detectable target and non-target stimuli. A total of 98 probands were enrolled in this study. We evaluated the latency and amplitude of the P3 component of visually evoked ERP. The mean P3 latency was 294 ± 28 ms and was not related to age (r = –0.089; p = 0.382; Spearman-rank-correlation). The P3 amplitude was related to age in the total sample (r = –0.323; p = 0.001; Spearmanrank-correlation) but not in the probands under the age of 60 years. There were no significant differences regarding sex. Our findings suggest that ERP are not age dependent if highly differentiable and detectable stimuli are used. This should be considered when normal values of ERP are created for clinical use.

Zusammenfassung

Bisher gelten ereigniskorrelierte Potenziale (EKP) als altersabhängig. Unbekannt ist jedoch, ob dieser Eigenschaft ein intrinsischer oder ein extrinsischer Faktor zugrunde liegt. Wir stellten eine Untersuchungsanordnung auf, in welcher EKP durch ein modifiziertes Oddball-Paradigma mit hoher Unterscheidbarkeit und Erkennbarkeit der Ziel- und Standardstimuli evoziert wurde. In unserer Studie wurden 98 Probanden untersucht. Wir werteten Latenzen und Amplituden der P3-Komponente der visuell evozierten EKP aus. Der Mittelwert der P3-Latenz betrug 294 ± 28 ms und war nicht altersabhängig (r = –0,089; p = 0,382; Spearman-rank-correlation). Die P3-Amplitude zeigte im Gesamtkollektiv eine Korrelation zum Alter (r = –0,323; p = 0,001; Spearman-rank-correlation), jedoch nicht für das Probandenkollektiv unter 60 Jahren. Es gab keine signifikanten Unterschiede bezogen auf das Geschlecht. Unsere Ergebnisse weisen darauf hin, dass EKP altersunabhängig sind, wenn hochgradig unterschiedliche und klar erkennbare Stimuli gewählt werden. Dies muss beachtet werden, wenn Normwerte der EKP für den klinischen Gebrauch erstellt werden.

Keywords

Event-related potentials - pattern reversal stimulation - oddball paradigm - sustained attention - age dependence

Schlüsselwörter

Ereigniskorrelierte Potenziale - Musterwechsel - Oddball-Paradigma - Daueraufmerksamkeit - Altersabhängigkeit

Volltext

Referenzen

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