The 70 years since the discovery of rapid eye movement sleep: history, electroencephalographic features and unsolved issues.
Level 5 - mechanism / opinion, no new human data
Narrative and historical review without systematic search methodology or new empirical data.
PubMed 39284581 · doi:10.1111/jsr.14342
What was done
This is a narrative and historical review synthesizing 70 years of research following the discovery of rapid eye movement (REM) sleep. The authors reviewed foundational milestones (including works by Aserinsky, Kleitman, Dement, and Jouvet) and subsequent literature on electroencephalographic features, brainstem mechanisms, muscle atonia, homeostatic regulation, REM deprivation and rebound effects, ultradian periodicity, and relationships between sleep-related arousals and consciousness.
What was found
The abstract reports no quantitative data or statistical estimates. It outlines key thematic domains of REM sleep biology: the coexistence of electroencephalographic activation with muscle atonia, the homeostatic rebound following REM deprivation, the role of REM sleep in emotional processing, its ultradian cycling, and the neurophysiological overlaps between REM sleep and wakefulness.
Why it matters
The paper synthesizes the historical trajectory and conceptual frameworks of REM sleep neurobiology over the seven decades since its discovery, clarifying unresolved questions regarding sleep architecture, arousals, and consciousness.
Limits
The paper is a narrative overview rather than a systematic review or meta-analysis; it does not report formal study selection criteria, risk of bias assessments, or novel primary empirical data. No quantitative effect sizes or population characteristics are provided in the abstract.