Effects of caffeine on topographic quantitative EEG
Open accessAbstract
Despite the widespread use of caffeine as a central nervous stimulant, the central pharmacodynamic properties of the drug have not yet been conclusively evaluated in humans. The present study was undertaken to assess the acute effects of caffeine on measures of topographical quantitative electroencephalogram (EEG) in normal subjects. Ten healthy male volunteers (mean age ± SD 25 ± 4 years) received placebo and 200 mg of caffeine as powder with oral water solution (caffeine amount = 2 cups of coffee) under randomized, double-blind crossover conditions on two different occasions. Before administration and 30 min afterwards, a 17-channel quantitative EEG was recorded during relaxation with eyes open and closed (15 min each). Caffeine caused a significant reduction of total EEG power at fronto-parieto-occipital and central electrode positions of both hemispheres when the subjects kept their eyes open. Absolute power of the slow and fast alpha and slow beta activities was diminished in various regions of the brain (p < 0.05). The effect was more pronounced with the subjects keeping their eyes open than with eyes closed. It can be concluded that quantitative EEG is a sensitive method to assess the effects of psychostimulants on the human brain. Therefore, in pharmaco-EEG studies, environmental factors such as caffeine have to be excluded.
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Higher caffeine doses, 200 mg and 400 mg, reduce absolute alpha power during resting with eyes open.
“Previous studies have reported a drop in absolute alpha power during resting with eyes open on ingestion of caffeine at higher dosages, e.g., 200 mg (30) and 400 mg (31).”
From L-Theanine and Caffeine in Combination Affect Human Cognition as Evidenced by Oscillatory alpha-Band Activity and Attention Task Performance (2008) · cites this paper as [30]
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Identifying the Effectiveness of Arabica Drip Coffee on Individual Human Brainwave
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Effect of Coffee on EEG Spectral Assymmetry
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Event-related potential extraction workflow based on kernel density estimation
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Cortical spectral dynamics of vibrotactile frequency processing
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A BRIEF INSIGHT INTO STIMULANTS’ EFFECTS: A REVIEW BASED ON STUDENTS
Karakoç, İ., Gül, I., Özdemir, I., Şenödeyici, E., Özdemir, J., & Özgören, M. (2023) · TURKISH MEDICAL STUDENT JOURNAL · doi:10.4274/tmsj.galenos.2023.2023-3-2
An enhanced experimental paradigm for auditory BCIs by addressing both acoustic and human factors
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- Authors
- Siepmann, M., & Kirch, W.
- Affiliations
- Technische Universität Dresden (DE)
- ORCID
- Siepmann, Martin
- Venue
- Neuropsychobiology
- Publisher
- S. Karger AG
- Published
- 2002
- Volume
- 45
- Issue
- 3
- Pages
- 161-166
- ISSN
- 0302-282X (ISSN-L)
- 1423-0224
- OpenAlex
- W2035706664
- Cited by
- 85
- References
- 28
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 5 · 2023: 10 · 2022: 2 · 2021: 8 · 2020: 4 · 2019: 5 · 2018: 7 · 2017: 2 · 2016: 1 · 2015: 7 · 2014: 4 · 2013: 4 · 2012: 2
- FWCI
- 1.21
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Neuropsychobiology (publishedVersion)
- PubMed (publishedVersion)
- Qucosa (Saxon State and University Library Dresden) (submittedVersion, other-oa)
- Topics
- Health Sciences › Medicine › Pharmacology › Coffee research and impacts
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
- Keywords
- caffeine, quantitative EEG, EEG topography, psychostimulants, alpha activity, beta activity, pharmaco-EEG
- MeSH terms
- Adult, Alpha Rhythm, Central Nervous System Stimulants, Beta Rhythm, Brain Mapping, Caffeine, Double-Blind Method, Electroencephalography, Humans, Male, Cross-Over Studies
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