Summary
This thesis investigates how circadian rhythm disruption—measured via melatonin secretion—relates to depression, sleep disturbances, and cognitive performance. It also explores how specific light wavelengths (450-480nm) drive circadian disruption and how filtering a narrow 470-480nm band can protect melatonin and stress hormone rhythms.
Key Findings
- Low nocturnal melatonin levels were associated with subsyndromal depression and altered sleep architecture.
- Exogenous melatonin inducing phase advances significantly improved depression scores and sleep initiation in circadian rhythm disorder patients.
- Filtering a 10nm bandwidth (470-480nm) from white light prevented nocturnal light-induced disruptions in melatonin and corticosterone.
Categories
Sleep & Circadian Health: Core focus on circadian rhythm disruption, melatonin, and sleep architecture
Mood & Mental Wellness: Demonstrates links between circadian dysfunction, depression scores, and mood improvement
The Science of Light: Investigates photic stimuli wavelengths and light filtering effects on circadian rhythms
Author(s)
S Rahman
Publication Year
2012
Related Publications
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
Mood & Mental Wellness
- The two‐process model of sleep regulation: a reappraisal
- Protecting the melatonin rhythm through circadian healthy light exposure
- Effects of artificial dawn and morning blue light on daytime cognitive performance, well-being, cortisol and melatonin levels
- Light therapy and Alzheimer's disease and related dementia: past, present, and future
- The role of daylight for humans: gaps in current knowledge
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