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Evaluation of circadian variation and effects of sleep deprivation on performance on tasks of working memory

Grant number: 11/01286-0
Support type:Regular Research Grants
Duration: July 01, 2011 - June 30, 2013
Field of knowledge:Humanities - Psychology - Physiological Psychology
Principal Investigator:Sabine Pompéia
Grantee:Sabine Pompéia
Home Institution: Escola Paulista de Medicina (EPM). Universidade Federal de São Paulo (UNIFESP). Campus São Paulo. São Paulo , SP, Brazil
Assoc. researchers: Giuliano Emerenciano Ginani


The concept of working memory has been extensively explored in various studies and is linked to intellectual capacity. The influential multicomponent model of working memory refers to a system that enables the temporary maintenance and manipulation of information, these functions governed by different subsystems. Although it is known that there are fluctuations in performance during the day and night, it is unclear how these variations influence performance in different subsystems of working memory, nor how they relate to attentional fluctuations in mood and cognitive effort involved in testing. Objective: To investigate the effect of circadian variation and short sleep deprivation during 36 hours of continuous wakefulness on the different working memory systems, attention, and measures of mood in healthy young volunteers. Materials and methods: The study will involve 20 healthy young volunteers who will perform a battery of cognitive tests including representative measures of the subsystems of working memory as well as vigilance tests every four hours during 36 hours of continuous wakefulness. Mood and physiological measures (pupillometry: indicative of cognitive effort during the tests) will be obtained concurrently with the tests. Applicability: The results of this study may help in the better characterization of cognitive processes related to academic performance, intellectual level, performance in shift work and shift arrangements and the demonstration of the relationship with mood changes and cognitive effort. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GINANI, GIULIANO EMERENCIANO; PRADELLA-HALLINAN, MARCIA; POMPEIA, SABINE. Identification of emotional expressiveness in facial photographs over 36h of extended vigilance in healthy young mena preliminary study. COGNITION & EMOTION, v. 31, n. 2, p. 339-348, 2017. Web of Science Citations: 3.

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