Carolin Reichert
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View article: Impact of Varying Sleep Pressure on Daytime Sleep Propensity in Healthy Young and Older Adults
Impact of Varying Sleep Pressure on Daytime Sleep Propensity in Healthy Young and Older Adults Open
Fixed sleep schedules with an 8 h time in bed (TIB) are used to ensure participants are well-rested before laboratory studies. However, such schedules may lead to cumulative excess wakefulness in young individuals. Effects on older individ…
View article: Effects of caffeine intake on pupillary parameters in humans: a systematic review and meta-analysis
Effects of caffeine intake on pupillary parameters in humans: a systematic review and meta-analysis Open
View article: Impact of one night of sleep restriction on sleepiness and cognitive function: A systematic review and meta-analysis
Impact of one night of sleep restriction on sleepiness and cognitive function: A systematic review and meta-analysis Open
Detrimental consequences of chronic sleep restriction on cognitive function are well established in the literature. However, effects of a single night of sleep restriction remain equivocal. Therefore, we synthesized data from 44 studies to…
View article: Aging effects on the encoding/retrieval flip in associative memory: fMRI evidence from incidental contingency learning
Aging effects on the encoding/retrieval flip in associative memory: fMRI evidence from incidental contingency learning Open
Introduction Associative memory is arguably the most basic memory function and therein constitutes the foundation of all episodic and semantic memory processes. At the same time, the decline of associative memory represents a core feature …
View article: Table of Contents
Table of Contents Open
View article: Ultradian sleep cycles: Frequency, duration, and associations with individual and environmental factors—A retrospective study
Ultradian sleep cycles: Frequency, duration, and associations with individual and environmental factors—A retrospective study Open
We conclude that ultradian sleep cycles are endogenous biological rhythms modulated by age, sex, and sleep homeostasis, but not directly responsive to (moderate levels of) environmental cues in healthy good sleepers.
View article: Association between circadian sleep regulation and cortical gyrification in young and older adults
Association between circadian sleep regulation and cortical gyrification in young and older adults Open
The circadian system orchestrates sleep timing and structure and is altered with increasing age. Sleep propensity, and particularly REM sleep is under strong circadian control and has been suggested to play an important role in brain plast…
View article: Brain activity during a working memory task after daily caffeine intake and caffeine withdrawal: a randomized double-blind placebo-controlled trial
Brain activity during a working memory task after daily caffeine intake and caffeine withdrawal: a randomized double-blind placebo-controlled trial Open
View article: Brain Activity during Working Memory Tasks after Daily Caffeine Intake: a randomized double-blind placebo-controlled trial
Brain Activity during Working Memory Tasks after Daily Caffeine Intake: a randomized double-blind placebo-controlled trial Open
Caffeine has been reported to acutely increase working memory (WM)-related brain activity without a significant enhancement in performances in healthy adults. As a ritual in the society, however, the impacts of daily caffeine intake on WM-…
View article: Adenosine, caffeine, and sleep–wake regulation: state of the science and perspectives
Adenosine, caffeine, and sleep–wake regulation: state of the science and perspectives Open
Summary For hundreds of years, mankind has been influencing its sleep and waking state through the adenosinergic system. For ~100 years now, systematic research has been performed, first started by testing the effects of different dosages …
View article: Time to Recover From Daily Caffeine Intake
Time to Recover From Daily Caffeine Intake Open
Caffeine elicits widespread effects in the central nervous system and is the most frequently consumed psychostimulant worldwide. First evidence indicates that, during daily intake, the elimination of caffeine may slow down, and the primary…
View article: Time to recover from daily caffeine intake
Time to recover from daily caffeine intake Open
Caffeine elicits widespread effects in the central nervous system and is the most frequently consumed psychostimulant worldwide. First evidence indicates that, during daily intake, the elimination of caffeine may slow down and the primary …
View article: Regular Caffeine Intake Delays REM Sleep Promotion and Attenuates Sleep Quality in Healthy Men
Regular Caffeine Intake Delays REM Sleep Promotion and Attenuates Sleep Quality in Healthy Men Open
Acute caffeine intake can attenuate homeostatic sleep pressure and worsen sleep quality. Caffeine intake—particularly in high doses and close to bedtime—may also affect circadian-regulated rapid eye movement (REM) sleep promotion, an impor…
View article: Working Memory Performance after Daily Caffeine Intake: Compromised Performance and Reduced Hippocampal Activity
Working Memory Performance after Daily Caffeine Intake: Compromised Performance and Reduced Hippocampal Activity Open
Neuroprotective effects of caffeine have been frequently reported in the context of disease and cognitive dysfunction as well as in epidemiological studies in humans. However, evidence on caffeine effects on neural and memory functions dur…
View article: The impact of daily caffeine intake on nighttime sleep in young adult men
The impact of daily caffeine intake on nighttime sleep in young adult men Open
Acute caffeine intake can delay sleep initiation and reduce sleep intensity, particularly when consumed in the evening. However, it is not clear whether these sleep disturbances disappear when caffeine is continuously consumed during dayti…
View article: Daily Caffeine Intake Induces Concentration-Dependent Medial Temporal Plasticity in Humans: A Multimodal Double-Blind Randomized Controlled Trial
Daily Caffeine Intake Induces Concentration-Dependent Medial Temporal Plasticity in Humans: A Multimodal Double-Blind Randomized Controlled Trial Open
Caffeine is commonly used to combat high sleep pressure on a daily basis. However, interference with sleep–wake regulation could disturb neural homeostasis and insufficient sleep could lead to alterations in human gray matter. Hence, in th…
View article: Wide awake at bedtime? Effects of caffeine on sleep and circadian timing in male adolescents – A randomized crossover trial
Wide awake at bedtime? Effects of caffeine on sleep and circadian timing in male adolescents – A randomized crossover trial Open
Adolescents often suffer from short and mistimed sleep. To counteract the resulting daytime sleepiness they frequently consume caffeine. However, caffeine intake may exaggerate sleep problems by disturbing sleep and circadian timing. In a …
View article: Regular caffeine intake attenuates REM sleep promotion and sleep quality in healthy men
Regular caffeine intake attenuates REM sleep promotion and sleep quality in healthy men Open
Acute caffeine intake can attenuate homeostatic sleep pressure and worsen sleep quality. Besides, caffeine intake – particularly in high doses and close to bedtime – may also affect circadian-regulated REM sleep promotion, an important det…
View article: The impact of daily caffeine intake on nighttime sleep: signs of overnight withdrawal?
The impact of daily caffeine intake on nighttime sleep: signs of overnight withdrawal? Open
Acute caffeine intake can delay sleep initiation and reduce sleep intensity, particularly when consumed in the evening. However, it is not clear whether these sleep disturbances disappear when caffeine is continuously consumed during dayti…
View article: Wide awake at bedtime? The effects of caffeine on sleep and circadian timing in teenagers - a randomized crossover trial
Wide awake at bedtime? The effects of caffeine on sleep and circadian timing in teenagers - a randomized crossover trial Open
Background Adolescents frequently consume caffeine with unknown consequences on sleep and circadian rhythms. In adults, the evidence indicates that caffeine acutely reduces homeostatic sleep pressure and delays the circadian timing system.…
View article: The Neural Mechanisms of Associative Memory Revisited: fMRI Evidence from Implicit Contingency Learning
The Neural Mechanisms of Associative Memory Revisited: fMRI Evidence from Implicit Contingency Learning Open
The literature describes a basic neurofunctional antagonism between episodic memory encoding and retrieval with opposed patterns of neural activation and deactivation, particularly in posterior midline regions. This has been coined the enc…
View article: Evidence That Homeostatic Sleep Regulation Depends on Ambient Lighting Conditions during Wakefulness
Evidence That Homeostatic Sleep Regulation Depends on Ambient Lighting Conditions during Wakefulness Open
We examined whether ambient lighting conditions during extended wakefulness modulate the homeostatic response to sleep loss as indexed by. slow wave sleep (SWS) and electroencephalographic (EEG) slow-wave activity (SWA) in healthy young an…
View article: Caffeine-induced Plasticity of Grey Matter Volume in Healthy Brains: A placebo-controlled multimodal within-subject study
Caffeine-induced Plasticity of Grey Matter Volume in Healthy Brains: A placebo-controlled multimodal within-subject study Open
Disturbed sleep homeostatic states have been found to alter neuronal homeostasis and reduce grey matter (GM) volume. Caffeine intake that interferes with sleep homeostasis through antagonizing adenosine receptors can impair hippocampal syn…
View article: Evidence that Homeostatic Sleep Regulation Depends on Ambient Illuminance Levels
Evidence that Homeostatic Sleep Regulation Depends on Ambient Illuminance Levels Open
We examined whether the ambient illuminance during extended wakefulness modulates the homeostatic increase in human deep sleep [i.e. slow wave sleep (SWS) and electroencephalographic (EEG) slow-wave activity (SWA)] in healthy young and old…
View article: Author Correction: Human brain patterns underlying vigilant attention: impact of sleep debt, circadian phase and attentional engagement
Author Correction: Human brain patterns underlying vigilant attention: impact of sleep debt, circadian phase and attentional engagement Open
View article: Caffeine-dependent changes of sleep-wake regulation: evidence for adaptation after repeated intake
Caffeine-dependent changes of sleep-wake regulation: evidence for adaptation after repeated intake Open
To enhance wakefulness, daily consumption of caffeine in the morning and afternoon is highly common. However, it is unknown whether such a regular intake pattern affects timing and quality of wakefulness, as regulated by an interplay of ci…
View article: Impact of age and napping on actimetry-derived sleep and 24-h rest-activity indices
Impact of age and napping on actimetry-derived sleep and 24-h rest-activity indices Open
View article: Association of circadian sleep-wake regulation and brain structure in older adults: a multi-modal approach
Association of circadian sleep-wake regulation and brain structure in older adults: a multi-modal approach Open
View article: 0180 Influence of Long-Term Caffeine Consumption and Its Withdrawal on Subjective Sleepiness, Vigilance, and Melatonin
0180 Influence of Long-Term Caffeine Consumption and Its Withdrawal on Subjective Sleepiness, Vigilance, and Melatonin Open
The acute effects of caffeine on sleepiness and cognition are well documented in habitual caffeine consumers who abstained from caffeine for several days. Sleepiness is reduced and vigilance enhanced by caffeine, particularly under high sl…
View article: Human brain patterns underlying vigilant attention: impact of sleep debt, circadian phase and attentional engagement
Human brain patterns underlying vigilant attention: impact of sleep debt, circadian phase and attentional engagement Open