Related Experiment Video
Updated: Aug 11, 2026

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice
Published on: August 2, 2017
Human EEG slow-wave sleep increased by a serotonin antagonist
A serotonin antagonist drug significantly increased slow-wave sleep duration in older adults. Sleep returned to baseline after drug withdrawal, with tolerance developing during treatment.
Area of Science:
- Neuroscience
- Sleep Medicine
- Pharmacology
Background:
- Serotonin is crucial for regulating EEG slow-wave sleep.
- Understanding serotonin's role requires studying its antagonists.
Purpose of the Study:
- To investigate the effects of a central serotonin antagonist, FU 29-245, on sleep architecture.
- To assess the impact of FU 29-245 on slow-wave sleep and other sleep stages.
Main Methods:
- Ten healthy volunteers (mean age 59 years) received FU 29-245 (200 mg) nightly for six nights.
- Sleep patterns were monitored and compared to baseline sleep data.
- Effects after drug withdrawal were also analyzed.
Main Results:
- FU 29-245 significantly increased the duration of slow-wave sleep compared to baseline.
- A rebound decrease in slow-wave sleep below baseline was observed after drug withdrawal.
- The drug reduced transitions into stage 1 sleep and decreased time spent in stages 1 and 2.
- Tolerance to the drug's effects developed by the fifth and sixth nights.
- No subjective side effects were reported by the participants.
Conclusions:
- Central serotonin antagonism by FU 29-245 enhances EEG slow-wave sleep in older adults.
- The observed effects are reversible upon drug withdrawal, indicating a direct pharmacological action.
- Tolerance development suggests adaptive mechanisms within the sleep-regulating system.
- FU 29-245 represents a potential tool for modulating slow-wave sleep, though tolerance is a factor.
More Related Videos
06:23A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
Published on: September 22, 2020
05:59High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster
Published on: October 20, 2023
Related Concept Videos
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Management of Insomnia
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Sleepwalking and Sleep Talking
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
REM Sleep Behavior Disorder
RBD is significantly associated with...