Related Experiment Video
Updated: Jun 17, 2026
18:08
Assaying Locomotor Activity to Study Circadian Rhythms and Sleep Parameters in Drosophila
Published on: September 28, 2010
46.7K
Sleep timing in flies from "adolescence" to adulthood
Esther D Domenie1, Paola Cusumano2, Sara Montagnese1,3
1Department of Medicine, University of Padova, Padova, Italy.
Fly
|January 8, 2025
Summary
Fruit fly sleep patterns change with age, mimicking adolescent human sleep timing shifts. This study tracked activity under simulated work and free days, revealing age-related sleep adjustments in Drosophila melanogaster.
Area of Science:
- Chronobiology
- Animal Behavior
- Developmental Biology
Background:
- Sleep is crucial for health, yet its developmental regulation is not fully understood.
- Drosophila melanogaster serves as a model organism for studying conserved biological processes, including sleep.
Purpose of the Study:
- To investigate age-related changes in sleep timing in Drosophila melanogaster.
- To analyze sleep patterns under simulated work and free day light-dark schedules.
Main Methods:
- Locomotor activity was recorded in male flies from 3 days old for 30 days.
- Flies were exposed to a 30-day light-dark cycle mimicking human work and free days.
- Sleep timing, activity counts, and sleep amount were analyzed.
Main Results:
- Flies showed bimodal activity (morning/evening peaks) and anticipated light transitions.
- Sleep amount increased and activity decreased from day 10 onwards.
- Free days led to increased activity and reduced sleep, with carry-over effects on subsequent work days.
- Sleep onset and offset timing showed progressive delays and subsequent advancements/stabilization.
Conclusions:
- Drosophila melanogaster exhibits age-dependent sleep timing changes.
- These changes in 'adolescent' flies resemble sleep alterations observed in human adolescents.
- The study highlights the utility of Drosophila in modeling developmental sleep dynamics.
Related Concept Videos
01:24Sleep-Wake Cycles
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:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
01:11Understanding Sleep
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...
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...
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...
01:22Stages of Sleep
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...
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
01:18Nightmares and Night Terrors
Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
Nightmares often...
Nightmares often...
01:16Psychosexual Stages of Personality: Latency
Following the phallic stage in Freud's theory of psychosexual development, children enter a phase called the latency period, which lasts from approximately six to twelve years of age. Unlike earlier stages, where sexual impulses played a central role, Freud believed these impulses are repressed during the latency period, becoming part of the unconscious. This stage is often described as a time of psychological calm after the turbulence of the phallic stage.
The latency period is not considered...
The latency period is not considered...