Related Experiment Video
Updated: May 8, 2026
08:45
Polygraphic Recording Procedure for Measuring Sleep in Mice
Published on: January 26, 2016
Multiple caffeine doses maintain vigilance during early morning operations
Gary H Kamimori1, Dagny Johnson, David Thorne
1Department of Behavioral Biology, Walter Reed Army Institute of Research, Washington, DC, USA. Gary.Kamimori@us.army.mil
Aviation, Space, and Environmental Medicine
|November 30, 2005
Summary
Multiple doses of 200 mg caffeine effectively maintained vigilance during sleep deprivation. This study identified the optimal caffeine dose for sustained performance when sleep-restricted.
Area of Science:
- Neuroscience
- Sleep Science
- Human Performance
Background:
- Sleep deprivation impairs cognitive functions, necessitating countermeasures.
- Caffeine is commonly used to combat sleepiness, but optimal dosing for sustained performance during sleep loss is unclear.
Purpose of the Study:
- To determine the optimal dose of caffeine for maintaining performance during sleep deprivation.
- To investigate the effects of multiple caffeine doses on vigilance.
Main Methods:
- 48 participants were randomized into placebo, 50, 100, or 200 mg caffeine groups.
- Participants underwent 29 hours of sleep deprivation.
- The Psychomotor Vigilance Test (PVT) and Stanford Sleepiness Scale (SSS) were administered across multiple test blocks.
Main Results:
- Caffeine significantly reduced lapses on the PVT in a dose-dependent manner.
- 200 mg of caffeine maintained performance at baseline levels throughout the sleep deprivation period.
- While sleepiness scores increased over time, caffeine did not significantly alter this trend.
Conclusions:
- Bi-hourly administration of 200 mg caffeine is effective in maintaining vigilance during a single night of sleep deprivation.
- This dosage strategy can sustain cognitive performance under conditions of acute sleep loss.
Related Concept Videos
01:24CNS Stimulants: Cocaine, Amphetamines and Cannabinoids
CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its effects by...
01:15Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
01:25Determination of Multiple Dosing Parameters: Loading and Maintenance Doses
A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
01:13Insufficient Sleep and Sleep Deprivation
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Sleep deprivation is a more severe form of sleep loss...
01:24Substance Use Disorders Affecting Sleep
Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
Understanding the concepts of physical dependence,...
01:29Stimulants
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...