Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Understanding Sleep01:11

Understanding Sleep

236
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
236
Stages of Sleep01:22

Stages of Sleep

201
Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
201
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

1.4K
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
1.4K
Understanding Memory01:19

Understanding Memory

320
Memory is the retention of information or experiences over time, facilitated through three main processes: encoding, storage, and retrieval. Encoding is the process of inputting information into the memory system. For instance, when listening to a lecture, watching a play, reading a book, or having a conversation, the brain is actively encoding information. This initial stage involves transforming sensory input into a form that can be processed and stored by the brain. Various factors, such as...
320
Long-Term Memory01:18

Long-Term Memory

174
Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
174
REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

211
REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
211

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Discovery of Tivumecirnon (FLX475), a Potent and Selective CCR4 Antagonist That Inhibits the Migration of Immunosuppressive Regulatory T Cells into the Tumor Microenvironment to Restore Antitumor Immunity.

Journal of medicinal chemistry·2026
Same author

Effects of antidepressants, anesthetics and sedatives/hypnotics on sleep-associated memory consolidation - A systematic review.

Journal of psychopharmacology (Oxford, England)·2026
Same author

Differences in sleep spindles and polysomnography in humans: a meta-analysis on the influence of age, sex, and cognitive ability.

Frontiers in sleep·2026
Same author

Targeted knockout of a host peroxisomal peptidase confers field resistance to maize lethal necrosis.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Discovery and Characterization of Zelnecirnon (RPT193), a Potent and Selective CCR4 Antagonist for Allergic Disorders.

Journal of medicinal chemistry·2026
Same author

Mitigation of renal toxicity induced by paraquat using ferulic acid: Role of inflammatory pathways.

Avicenna journal of phytomedicine·2026

Related Experiment Video

Updated: Jul 12, 2025

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
08:20

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood

Published on: October 2, 2019

12.0K

Memory ability and retention performance relate differentially to sleep depth and spindle type.

Fereshteh Dehnavi1,2, Ping Chai Koo-Poeggel3,4, Maryam Ghorbani1,5,2

  • 1Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran.

Iscience
|October 25, 2023
PubMed
Summary

This study reveals that the precise timing of sleep rhythms, specifically slow oscillations and sleep spindles during NREM sleep, is linked to memory ability and overnight memory consolidation in healthy individuals.

Keywords:
biological scienceschronobiologyclinical neurosciencehealth sciencesnatural sciencesneurologyneuroscience

More Related Videos

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
08:08

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory

Published on: June 18, 2014

27.1K
Polygraphic Recording Procedure for Measuring Sleep in Mice
08:45

Polygraphic Recording Procedure for Measuring Sleep in Mice

Published on: January 25, 2016

23.8K

Related Experiment Videos

Last Updated: Jul 12, 2025

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
08:20

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood

Published on: October 2, 2019

12.0K
Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
08:08

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory

Published on: June 18, 2014

27.1K
Polygraphic Recording Procedure for Measuring Sleep in Mice
08:45

Polygraphic Recording Procedure for Measuring Sleep in Mice

Published on: January 25, 2016

23.8K

Area of Science:

  • Neuroscience
  • Sleep Science
  • Cognitive Neuroscience

Background:

  • Non-rapid eye movement (NREM) sleep involves complex temporal interactions between brain rhythms, including slow oscillations (SO) and sleep spindles.
  • The coupling between SO and spindles is hypothesized to be critical for memory processing and cognitive functions.

Purpose of the Study:

  • To investigate the relationship between NREM sleep depth, sleep spindles, and SO-spindle coupling with general memory ability and overnight memory consolidation in healthy humans.
  • To explore the functional relevance of spindle dynamics (slow vs. fast) and SO phase in relation to cognitive performance.

Main Methods:

  • Utilized cross-frequency coupling analyses to examine temporal coordination between SO and sleep spindles during NREM sleep stages (specifically N2).
  • Employed a General Linear Model (GLM) to assess the predictive power of sleep features on memory consolidation.
  • Measured NREM sleep depth, spindle properties, and SO-spindle coupling in relation to memory performance.

Main Results:

  • Stronger precise temporal coordination of slow spindles to the SO down-state during N2 sleep was observed in individuals with higher general memory ability.
  • Fast spindle properties were found to predict overnight memory consolidation.
  • NREM sleep depth, SO-spindle temporal coupling, and spindle properties collectively influence cognitive processing.

Conclusions:

  • Cognitive performance is associated with finely tuned temporal coupling between SO and sleep spindles, alongside specific spindle properties and brain sleep states.
  • These findings highlight 'cognitive fingerprints' reflecting the interplay of sleep rhythms and their impact on memory.
  • The study underscores the functional importance of specific sleep rhythm dynamics for memory consolidation and general cognitive ability.