Keywords
Visual evoked potential, Latency, Amplitude
Abstract
Background: Visual evoked potential (VEP) is one of the basic tests for evaluating the function of the
visual pathway. In the interpretation, each examination room should have a normal value for
comparison, because the normative data of each is not the same.
Purpose: To determine the latency and amplitude of normal VEP between the age of 15 to 70 years.
Materials and methods: The study was conducted in neurological lab of Thammasat hospital on healthy subjects between the age of 15 to 70 years. Pattern-reversal VEP parameters: P100 latency and amplitude (N75-P100) were recorded.
Results: Thirty healthy subjects (male:18, female:12) were included in the study. Range of age between 15 to 68 years (mean:32.5 years). The mean latency in male subjects was 103.10 ± 3.48 and 104.60 ± 4.19 milliseconds in the right and left eye, respectively. The mean amplitude was 14.00 ± 8.28 and 14.40 ± 8.78 microvolt in the right and left eye, respectively. The mean latency in female subjects was 100.70 ± 6.18 and 100.98 ± 5.49 milliseconds in the right and left eye, respectively. The mean amplitude was 15.69 ± 8.64 and 13.79 ± 7.24 microvolt in the right and left eye, respectively.
Conclusion: The present study showed that no significant gender difference in VEP latency and amplitude. In clinical application, there is a difference in the recording instruments and study protocol, which affect the difference in parameters. Therefore, each room should have its normative data for reference.
Recommended Citation
Thitiwichienlert, Suntaree and Siriburana, Ranipha.
2020
Preliminary study of visual evoked potential in Thammasat Hospital.
Asian Medical Journal and Alternative Medicine. 20,
1 (Jan. 2020 ),
Available at: https://doi.org/10.70933/2773-9465.1685
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