Diurnal Variation in a Visual-Motor Coordination Test in Healthy Humans

Campos, Tânia; Silva, Selma B.; Fernandes, Maria G.; Araújo, John Fontenele; Menezes, Alexandre A.L.

doi:10.1076/brhm.32.2.255.1349

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…Circadian rhythms are ≈24 h oscillations in several domains (Kondo et al, 1993; Campos et al, 2001; DeCoursey, 2004) governed by circadian clocks, which are present in the central nervous system (CNS) and peripheral tissues of mammals (Dibner et al, 2010). Circadian clocks drive local rhythms so that biochemical and physiological processes occur at the appropriate time for optimal functioning of the organism.…”

Section: Introductionmentioning

confidence: 99%

Food entrainment: major and recent findings

Carneiro¹,

Araújo²

2012

Front. Behav. Neurosci.

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Mammals exhibit daily anticipatory activity to cycles of food availability. Studies on such food anticipatory activity (FAA) have been conducted mainly in nocturnal rodents. They have identified FAA as the behavioral output of a food entrained oscillator (FEO), separate of the known light entrained oscillator (LEO) located in the suprachiasmatic nucleus (SCN) of hypothalamus. Here we briefly review the main characteristics of FAA. Also, we present results on four topics of food anticipation: (1) possible input signals to FEO, (2) FEO substrate, (3) the importance of canonical clock genes for FAA, and (4) potential practical applications of scheduled feeding. This mini review is intended to introduce the subject of food entrainment to those unfamiliar with it but also present them with relevant new findings on the issue.

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Section: Introductionmentioning

confidence: 99%

Food entrainment: major and recent findings

Carneiro¹,

Araújo²

2012

Front. Behav. Neurosci.

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“…They include biochemical, physiological, behavioral, and cognitive rhythms in organisms as diverse as bacteria and mammals (Campos, Silva, Fernandes, Araujo, & Menezes, 2001;DeCoursey, 2004). Circadian rhythms entrain (i.e., synchronize) to cyclic environmental cues (zeitgebers, from the German for "time-givers"), of which the most evident is the daily light/ dark cycle created by the earth's rotation.…”

Section: Introductionmentioning

confidence: 99%

Daily anticipatory rhythms of behavior and body temperature in response to glucose availability in rats.

Carneiro

Fernandes

Medeiros

et al. 2012

Psychology & Neuroscience

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When food is available recurrently at a particular time of day, several species increase their locomotion in the hours that precede food delivery, a phenomenon called food anticipatory activity (FAA). In mammals, many studies have shown that FAA is driven by a food-entrained circadian oscillator (FEO) that is distinct from the light-entrained pacemaker in the suprachiasmatic nucleus of the hypothalamus. Few studies have investigated the effect of sugar ingestion on food anticipatory rhythms and the FEO. We aimed to extend the understanding of the role of glucose on the emergence of food anticipatory rhythms by investigating whether glucose ingestion is sufficient to produce daily food anticipation, reflected by motor activity and core body temperature rhythms. Under a 12 h/12 h light/dark cycle, chow-deprived rats had glucose solution available between Zeitgeber Time (ZT) 6 and ZT 9 for 10 days (glucose restriction group), whereas control animals had chow available within the same time window (chow restriction group). Animals in both groups exhibited anticipatory motor activity and body temperature around the fourth day of the scheduled food restriction. Glucose-fed rats ingested ~15 kcal on the days immediately before FAA emergence and reached an intake of ~20 kcal/day, whereas chow-fed rats ingested ~40 kcal/day. The glucose restriction group exhibited a pattern of food anticipation (activity and temperature) that was extremely similar to that observed in the chow restriction group. We conclude that glucose ingestion is a sufficient temporal cue to produce recurrent food anticipation, reflected by activity and temperature rhythms, in rats.

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“…After this period, its performance improves again in the intermediate and evening profiles [18]. Regardless of the circadian preferences of these profiles, females perform significantly better than males in visuo-motor coordination, hence the effect of gender on psychomotor performance [19].…”

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confidence: 99%

Circadian Fluctuations of Cognitive and Psychomotor Performance in Medical Students: The Role of Daytime and Chronotype Patterns

Sabaoui,

Lotfi,

Talbi

2023

Chronobiol Med

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Objective: Our research aimed to explore the impact of chronotype and time of day on the cognitive and psychomotor performance of medical students around 25 years old. The study provides evidence that an individual’s circadian rhythm affects their daily performance and cognitive processes.Methods: To measure selective attention and inhibition, we utilized the Stroop test, while three subtests from the fourth edition of Wechsler Adult Intelligence Scale (WAIS-IV) were employed to measure simple attention and working memory. In addition, the Leed psychomotor tester was utilized to measure perception and motor reaction time, and the morningness-eveningness questionnaire was administered to investigate students’ chronotype. Statistical analysis were based on many tests depending on the correlation types. We mainly used ANOVA repeated measures, Bonferroni post-hoc test, ANOVA I, chi-square, and Pearson correlation tests.Results: Our findings suggest that students exhibit decreased selective attention (F=128.842b, p<0.01, η<sup>2</sup>=0.868, 95% CI=2.744–16.998) and weakened inhibition during the late afternoon (6 p.m.) when the largest margin of error was committed (1.56±2.90) compared to 10 a.m. (0.82±1.72), leading to increased difficulty resisting interference; except that the size effect was small (η<sup>2</sup>>0.13). Simple attention reaches its peak in the morning around 10 a.m., while memory performance and auditory modality of working memory reach their peaks at 10 a.m. and the end of the afternoon (6 p.m.), respectively.Conclusion: Our study underscores the importance of taking wake time and body temperature into account when examining task performance. Overall, the study highlights the importance of considering circadian rhythm and chronotype when designing academic and athletic schedules.

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Diurnal Variation in a Visual-Motor Coordination Test in Healthy Humans

Cited by 6 publications

References 22 publications

Food entrainment: major and recent findings

Food entrainment: major and recent findings

Daily anticipatory rhythms of behavior and body temperature in response to glucose availability in rats.

Circadian Fluctuations of Cognitive and Psychomotor Performance in Medical Students: The Role of Daytime and Chronotype Patterns

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