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Acute effects of caffeine on threat-selective attention: Moderation by anxiety and EEG theta/beta ratio
Background
Spontaneous EEG theta/beta ratio (TBR) probably marks prefrontal cortical (PFC) executive control, and its regulation of attentional threat-bias. Caffeine at moderate doses may strengthen executive control through increased PFC catecholamine action, dependent on basal PFC function.
Goal
To test if caffeine affects threat-bias, moderated by baseline frontal TBR and trait-anxiety.
Methods
A pictorial emotional Stroop task was used to assess threat-bias in forty female participants in a cross-over, double-blind study after placebo and 200 mg caffeine.
Results
At baseline and after placebo, comparable relations were observed for negative pictures: high TBR was related to low threat-bias in low trait-anxious people. Caffeine had opposite effects on threat-bias in low trait-anxious people with low and high TBR.
Conclusions
This further supports TBR as a marker of executive control and highlights the importance...
Show moreBackground
Spontaneous EEG theta/beta ratio (TBR) probably marks prefrontal cortical (PFC) executive control, and its regulation of attentional threat-bias. Caffeine at moderate doses may strengthen executive control through increased PFC catecholamine action, dependent on basal PFC function.
Goal
To test if caffeine affects threat-bias, moderated by baseline frontal TBR and trait-anxiety.
Methods
A pictorial emotional Stroop task was used to assess threat-bias in forty female participants in a cross-over, double-blind study after placebo and 200 mg caffeine.
Results
At baseline and after placebo, comparable relations were observed for negative pictures: high TBR was related to low threat-bias in low trait-anxious people. Caffeine had opposite effects on threat-bias in low trait-anxious people with low and high TBR.
Conclusions
This further supports TBR as a marker of executive control and highlights the importance of taking baseline executive function into consideration when studying effects of caffeine on executive functions.
Show less- All authors
- Son, D. van; Schalbroeck, R.; Angelidis, A.; Wee, N.J.A. van der; Does, W. van der; Putman, P.
- Date
- 2018-05-21
- Journal
- Biological Psychology
- Volume
- 136
- Pages
- 100 - 110