Acute effect of caffeine on pattern-reversal visual evoked potential: a randomized-controlled study


Top Karti D., Karti Ö., Gokcay F., Celebisoy N.

Cutaneous and Ocular Toxicology, vol.38, no.3, pp.249-252, 2019 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 3
  • Publication Date: 2019
  • Doi Number: 10.1080/15569527.2019.1583248
  • Journal Name: Cutaneous and Ocular Toxicology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.249-252
  • Keywords: Caffeine, coffee beans, coffee beverages, visual evoked potential test
  • Dokuz Eylül University Affiliated: No

Abstract

Purpose: This study was aimed to investigate the acute effect of caffeine intake on pattern-reversal (PR) visual evoked potential (VEP). Methods: This randomized controlled study included 40 participants who were divided into two groups randomly (group 1 [study group, n = 20] and group 2 [control group, n = 20]). While the study group received coffee beverages made from 6 g pure coffee beans (36 mg of caffeine per gram) containing approximately 216 mg caffeine, the control group was given beverages containing 200 mg lactose without caffeine. PR-VEP test was performed at baseline and 1 h after the beverage intake. The right eyes of both groups were used for the statistical analysis. Results: The median age of group 1 (8 male and 12 female) and group 2 (7 male and 13 female) were 31.0 (range, 21–59) and 36.5 (range, 20–59) years, respectively. No statistically significant difference was found between two groups in terms of age (p = 0.398) and gender (p = 0.744). Before the caffeine intake, median P100 latency and amplitudes were 109.90 ms (range: 99.60–120.60) and 12.45 µV (range: 5.20–19.30), respectively. One hour after caffeine intake, corresponding values were 110.70 ms (range: 99.00–114.60) and 12.45 µV (range: 5.70–20.0). Baseline P100 latency and amplitude values were not significantly different from the values recorded 1 h after caffeine intake (p > 0.05). Conclusions: This study showed that ingesting moderate amounts of caffeine did not affect PR-VEP parameters. Therefore, caffeine restriction does not seem to be required before the PR-VEP test. Further studies are needed to confirm our findings.