Neuronal network controlling REM sleep.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic neurocircuitry without original human clinical trial data.
PubMed 38972672 · doi:10.1111/jsr.14266
What was done
This narrative review synthesized literature describing the neuronal networks and neurochemical pathways responsible for the onset, maintenance, and features (electroencephalographic activation and muscle atonia) of rapid eye movement (REM) sleep.
What was found
The abstract provides no quantitative metrics or numerical data. It describes a mechanistic model: - Muscle atonia during REM sleep is driven by glutamatergic neurons in the pontine sublaterodorsal tegmental nucleus (SLD), which excite glycinergic/GABAergic premotoneurons in the ventromedial medulla. - SLD REM-on neurons are suppressed during wakefulness and non-REM sleep by GABAergic REM-off neurons in the ventrolateral periaqueductal gray and adjacent dorsal deep mesencephalic reticular nucleus. - Melanin-concentrating hormone and GABAergic REM-on neurons in the lateral hypothalamus inhibit these REM-off neurons to initiate REM sleep. - Limbic cortical structures are activated during REM sleep via the claustrum, supramammillary nucleus, and basolateral amygdala.
Why it matters
It outlines the current consensus on the brainstem and forebrain circuitry governing REM sleep, providing an anatomical framework for understanding sleep regulation and motor control disorders like REM sleep behavior disorder.
Limits
The abstract reports no empirical data, effect sizes, or study counts. The mechanistic model relies heavily on preclinical animal studies, which may not fully capture human neurobiology, and narrative reviews lack the systematic methodology to eliminate selection bias.
Cited by
- supports Rapid eye movement (REM) sleep is characterized by high brain activity while the body is paralyzed.