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

Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

1.4K
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...
1.4K
Understanding Sleep01:11

Understanding Sleep

1.7K
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...
1.7K
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

3.0K
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:
3.0K
Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

1.8K
Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
1.8K
Stages of Sleep01:22

Stages of Sleep

1.6K
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...
1.6K
Substance Use Disorders Affecting Sleep01:24

Substance Use Disorders Affecting Sleep

610
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,...
610

You might also read

Related Articles

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

Sort by
Same author

Maternal depressive symptoms are not linked to infant rest-activity patterns at six months.

Chronobiology international·2026
Same author

L5 onset as a proxy for circadian phase in infants.

Chronobiology international·2026
Same author

Factors associated with carrying out activities to stimulate child development in the family context.

Jornal de pediatria·2026
Same author

Wrist temperature as a sleep marker in actigraphy.

Chronobiology international·2025
Same author

Morningness-eveningness scale for children: Difficulties in establishing reference score intervals by age and sex throughout adolescence.

Chronobiology international·2025
Same author

Erratum to "Association of food intake with sleep disorders in children and adolescents with obesity" [Sleep Med: X 4 (2022) 100053].

Sleep medicine: X·2025

Related Experiment Video

Updated: May 1, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

13.3K

Does the transition into daylight saving time really cause partial sleep deprivation?

Manoel Carlos Toth Quintilham1, Taísa Adamowicz, Erico Felden Pereira

  • 1Departmento of Cell Biology and.

Annals of Human Biology
|March 25, 2014
PubMed
Summary

Undergraduate students showed partial adjustment to daylight saving time (DST) transitions, with delayed wake-up times and altered sleep patterns observed across different chronotypes. Genetic factors did not influence this sleep adjustment.

Keywords:
Chronotypeclock genesdaylight saving timesleep–wake cycle

More Related Videos

Establishing a Device for Sleep Deprivation in Mice
05:05

Establishing a Device for Sleep Deprivation in Mice

Published on: September 22, 2023

2.8K
Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
10:16

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Published on: April 7, 2020

9.6K

Related Experiment Videos

Last Updated: May 1, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

13.3K
Establishing a Device for Sleep Deprivation in Mice
05:05

Establishing a Device for Sleep Deprivation in Mice

Published on: September 22, 2023

2.8K
Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
10:16

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Published on: April 7, 2020

9.6K

Area of Science:

  • Chronobiology
  • Sleep Science
  • Human Physiology

Background:

  • Daylight Saving Time (DST) transitions disrupt natural circadian rhythms.
  • Understanding chronotype-specific adaptations to DST is crucial for public health.
  • Previous research indicates varied individual responses to societal time shifts.

Purpose of the Study:

  • To investigate sleep pattern alterations in undergraduate students following the DST transition.
  • To examine how chronotype influences the adjustment to DST-induced changes in sleep-wake schedules.
  • To explore potential genetic associations (CLOCK, PER3) with sleep pattern adjustments to DST.

Main Methods:

  • Utilized the Morningness-Eveningness Questionnaire (MEQ) to classify student chronotypes (Morning, Intermediate, Evening).
  • Collected sleep-wake diary data for 378 students one week before and after the DST transition.
  • Performed genetic analysis on oral mucosal cell samples to assess polymorphisms in CLOCK and PER3 genes.

Main Results:

  • Following DST, intermediate chronotype students delayed bedtime and increased time in bed; all groups delayed wake-up times.
  • All chronotypes exhibited a reduced phase angle between sunset and bedtime post-DST.
  • No significant association was found between CLOCK/PER3 gene polymorphisms and individual sleep pattern adjustments to DST.

Conclusions:

  • Student adjustment to DST-induced social time shifts was partial, characterized by delayed sleep timing.
  • Intermediate chronotype students experienced the most significant changes in bedtime and time in bed.
  • The study highlights chronotype-dependent variations in sleep adaptation to DST, independent of the investigated genetic factors.