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Effects of a new slow release formulation of caffeine on EEG, psychomotor and cognitive functions in sleep‐deprived subjects
Author(s) -
Patat Alain,
Rosenzweig Pierre,
Enslen Marc,
Trocherie Suzanne,
Miget Nathalie,
Bozon MarieChristine,
Allain Hervé,
Gandon JeanMarc
Publication year - 2000
Publication title -
human psychopharmacology: clinical and experimental
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.461
H-Index - 78
eISSN - 1099-1077
pISSN - 0885-6222
DOI - 10.1002/(sici)1099-1077(200004)15:3<153::aid-hup154>3.0.co;2-c
Subject(s) - sleep deprivation , psychomotor learning , flicker fusion threshold , caffeine , vigilance (psychology) , stroop effect , psychology , anesthesia , effects of sleep deprivation on cognitive performance , electroencephalography , audiology , crossover study , placebo , arousal , stimulant , psychomotor disorder , cognition , medicine , psychiatry , neuroscience , alternative medicine , pathology , electrical engineering , flicker , engineering
Caffeine is a widely‐consumed psychoactive substance whose stimulant effects on mood, attention and performance are largely recognised. The central nervous system pharmacodynamic profile of a single oral dose of a new slow release (SR) caffeine formulation (600 mg) was assessed in a randomised, double‐blind, crossover, placebo‐controlled study. Twelve young, health, male, sleep‐deprived (for 36 h) subjects were studied using EEG and various measures of psychomotor and cognitive functions, including critical flicker fusion (CFF), choice reaction task (CRT), tracking, continuous performance task (CPT), Stroop test, body sway and subjective evaluation (Stanford Sleepiness Scale). Caffeine significantly ( < 0/05) antagonised the detrimental effects of sleep‐deprivation on EEG (i.e. produced a significant decrease in delta and theta relative power and a significant increase in alpha and beta (12–40 Hz) relative power) and psychomotor performance (significant increase in speed of reaction on the CRT and Stroop tests, significant decrease in body sway, significant increase in accuracy of the CPT and significant reduction in subjective sedation) compared to placebo. The effect peaked 4 h after dosing and was maintained until the end of sleep deprivation (i.e. 24 h after dosing). In conclusion, the present results demonstrate that a single dose of caffeine SR possesses alerting effects which are able to reverse the deleterious effect of 36 h sleep deprivation for at least 24 h. Copyright © 2000 John Wiley & Sons, Ltd.