Circadian Rhythm Sleep-Wake Disorders.
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic search methodology or empirical data.
PubMed 28777176 · doi:10.1212/CON.0000000000000499
What was done
This narrative review summarizes the physiology of endogenous 24-hour circadian rhythms, their entrainment by external zeitgebers (such as light, exercise, and meal timing), their relationship to neurologic conditions (such as epilepsy and dementia), and the presentation and management of circadian rhythm sleep-wake disorders.
What was found
The abstract reports no numerical data or quantitative outcomes. It describes phenotypic patterns, noting that advanced sleep-wake phase disorder is characterized by early sleep onset and early morning awakening (most common in older adults); delayed sleep-wake phase disorder involves sleep-onset insomnia and morning sleepiness; and irregular sleep-wake rhythm disorder presents as fragmented sleep and wake patches throughout the day.
Why it matters
The paper provides a clinical overview to help clinicians recognize specific circadian rhythm sleep-wake phenotypes and understand their overlap with underlying neurologic disease.
Limits
This is a narrative educational review containing no empirical data, systematic search methodology, or quantitative synthesis. The abstract provides no sample sizes or statistical comparisons.
Cited by
- context Human body temperature must increase by approximately 1 to 3 degrees Fahrenheit to wake up feeling energized.