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Visual evoked potential in young adults: a normative study.

O P Tandon¹, K N Sharma

¹Department of Physiology, University College of Medical Sciences, Shahdara, Delhi.

Indian Journal of Physiology and Pharmacology

|October 1, 1989

Summary

This study established normative data for pattern visual evoked potential (VEP-P) in young adults. Results show no significant ethnic variations in P100 latency, supporting VEP-P as a reliable diagnostic tool.

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Area of Science:

Neuroscience
Ophthalmology

Background:

Establishing normative data for electrophysiological tests like visual evoked potential (VEP) is crucial for accurate clinical application.
Pattern visual evoked potential (VEP-P) is a valuable tool for assessing visual pathway function.

Purpose of the Study:

To acquire adequate normative data for pattern visual evoked potential (VEP-P) in a young adult population.
To investigate potential ethnic variations in VEP-P parameters, specifically P100 latency.

Main Methods:

A cohort of 27 healthy young adults (20 males, 7 females, aged 17-35) underwent VEP-P testing.
Standard electroencephalography (EEG) equipment and Ag/Agcl electrodes were used with a 10-20 system placement.
Transient pattern reversal stimuli (32' checker size, 1 Hz frequency, 67% contrast) were presented, and responses were averaged.

Main Results:

The P100 latency for males was reported as 95.37 +/- 6.85 ms, and for females as 91.07 +/- 49 ms.
Amplitudes for males and females were 6.4 +/- 2.38 microV and 6.88 +/- 2.79 microV, respectively.
The obtained P100 latency values were comparable to those reported in Western populations.

Conclusions:

The study successfully generated normative VEP-P data for young adults.
Findings suggest no significant ethnic variations in P100 latency, validating VEP-P's cross-cultural applicability.
This data supports the use of VEP-P as a diagnostic tool in diverse populations.

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