Summary
This review outlines the physiological mechanisms by which shift and night work disrupts the biological clock, leading to adverse health outcomes, and provides guidance for occupational physicians on screening and prevention strategies. Lighting interventions that support circadian alignment—such as timed bright light exposure and light avoidance—are implied as key preventive tools for shift workers.
Key Findings
- Night shift work disrupts the biological clock by inverting the sleep-wake rhythm relative to the light-dark cycle, increasing risk of multiple adverse health outcomes.
- The suprachiasmatic nucleus synchronizes peripheral tissue clocks primarily via the light-dark cycle, making light exposure a critical lever for circadian health in shift workers.
- Occupational physicians are advised to screen shift and night workers for circadian disruption symptoms and implement preventive strategies, though specific quantitative effect sizes are not reported in the abstract.
Categories
Shift Work & Staff Wellbeing: Reviews health risks associated with circadian disruption in night and shift workers, directly relevant to occupational health management.
Sleep & Circadian Health: Covers the physiological mechanisms of circadian rhythm regulation, including the light-dark cycle and sleep-wake disruption in shift workers.
The Science of Light: Discusses the suprachiasmatic nucleus and light-dark cycle as the primary synchronizer of biological clocks across peripheral tissues.
Author(s)
A Copertaro, M Bracci
Publication Year
2019
Number of Citations
39
Related Publications
Shift Work & Staff Wellbeing
- Off the clock: from circadian disruption to metabolic disease
- Endocrine regulation of circadian physiology
- Shiftwork and light at night negatively impact molecular and endocrine timekeeping in the female reproductive axis in humans and rodents
- Circadian Rhythms Disrupted by Light at Night and Mistimed Food Intake Alter Hormonal Rhythms and Metabolism
- Alerting and circadian effects of short-wavelength vs. long-wavelength narrow-bandwidth light during a simulated night shift
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The two‐process model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice