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Related Concept Videos

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Insomnia is a prevalent sleep disorder characterized by difficulty falling asleep, frequent awakenings during the night, and waking up too early without being able to return to sleep. People with insomnia often experience these disruptions at least three nights a week for at least one month. Chronic insomnia, which lasts for at least three months, can lead to increased anxiety, which in turn can worsen sleep difficulties, creating a cycle of sleeplessness and stress.
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The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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Fatigue01:21

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Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
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Related Experiment Video

Updated: Aug 19, 2025

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
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Fatigue performance in patients with chronic insomnia.

Lin Xu1, Qianran Zhang2, Hongming Dong2

  • 1Department of Neurology, Tianjin Medical University General Hospital, Tianjin, China.

Frontiers in Neuroscience
|November 28, 2022
PubMed
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Chronic insomnia impairs driving performance, especially in free-flow traffic, and is linked to cognitive deficits. This affects vehicle control and increases accident risk.

Keywords:
automobile drivingcognitionfatiguesleep initiation and maintenance disorderstask performance and analysis

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Area of Science:

  • Neuroscience
  • Sleep Medicine
  • Traffic Safety

Background:

  • Insomnia is linked to fatigue, reduced driving ability, and increased traffic accident risk.
  • Understanding how chronic insomnia affects driving performance in different traffic scenarios is crucial for public safety.

Purpose of the Study:

  • To assess the impact of fatigue on driving performance in individuals with chronic insomnia.
  • To compare driving performance in free-flow and car-following traffic scenarios.
  • To investigate the relationship between driving skills, cognitive function, and insomnia severity.

Main Methods:

  • 15 participants with chronic insomnia and 16 healthy controls underwent cognitive tests (TMT, SCWT, SDMT, DST).
  • Simulated driving tasks were performed in free-flow and car-following scenarios.
  • Driving performance metrics included mean speed (MS), mean acceleration (MA), mean lateral position (MLP), and standard deviation of lateral position (SDLP).

Main Results:

  • The insomnia group showed poorer lateral vehicle control (higher SDLP) than healthy controls.
  • Driving impairment was more pronounced in the free-flow scenario for the insomnia group.
  • Poorer cognitive function (lower TMT, SDMT, DST scores) correlated with impaired driving performance (lower MS, higher errors, longer completion times).

Conclusions:

  • Chronic insomnia significantly impairs driving performance, particularly lateral control and performance in less structured traffic.
  • Cognitive deficits associated with insomnia directly contribute to poorer driving outcomes.
  • Findings highlight the need for interventions to mitigate driving risks in individuals with chronic insomnia.