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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Acute personalized habitual caffeine doses improve attention and have selective effects when considering the fractionation of executive functions

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Author(s):
Lanini, Juliana [1] ; Fernandes Galduroz, Jose Carlos [1] ; Pompeia, Sabine [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Paulo, Dept Psicobiol, Rua Botucatu, 862, 1 Andar, Edificio Ciencias Biomed, BR-04023062 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: HUMAN PSYCHOPHARMACOLOGY-CLINICAL AND EXPERIMENTAL; v. 31, n. 1, p. 29-43, JAN 2016.
Web of Science Citations: 5
Abstract

Caffeine is widely used, often consumed with food, and improves simple and complex/executive attention under fasting conditions. We investigated whether these cognitive effects are observed when personalized habitual doses of caffeine are ingested by caffeine consumers, whether they are influenced by nutriments and if various executive domains are susceptible to improvement. This was a double-blind, placebo-controlled study including 60 young, healthy, rested males randomly assigned to one of four treatments: placebo fasting, caffeine fasting, placebo meal and caffeine meal. Caffeine doses were individualized for each participant based on their self-reported caffeine consumption at the time of testing (morning). The test battery included measures of simple and sustained attention, executive domains (inhibiting, updating, shifting, dual tasking, planning and accessing long-term memory), control measures of subjective alterations, glucose and insulin levels, skin conductance, heart rate and pupil dilation. Regardless of meal intake, acute habitual doses of caffeine decreased fatigue, and improved simple and sustained attention and executive updating. This executive effect was not secondary to the habitual weekly dose consumed, changes in simple and sustained attention, mood, meal ingestion and increases in cognitive effort. We conclude that the morning caffeine ``fix{''} has positive attentional effects and selectively improved executive updating whether or not caffeine is consumed with food. Copyright (C) 2015 John Wiley \& Sons, Ltd. (AU)

FAPESP's process: 11/01204-3 - Relations between cognitive and physiologic effects of caffeine
Grantee:Sabine Pompéia
Support type: Regular Research Grants