The anatomical, cellular and synaptic basis of motor atonia during rapid eye movement sleep.
Level 5 - mechanism / opinion, no new human data
Narrative review of neuroanatomical and synaptic mechanisms without primary human data
PubMed 27060683 · doi:10.1113/JP271324
What was done
This paper provides a narrative review synthesizing literature on the brainstem circuitry controlling rapid eye movement (REM) sleep, focusing on the anatomical, cellular, and synaptic mechanisms responsible for generating postural muscle atonia.
What was found
The abstract reports no quantitative measurements or statistical data. It describes the established circuit model where glutamatergic neurons in the sublaterodorsal nucleus (SLD) project descending signals to glycinergic premotor neurons in the spinal cord and ventromedial medulla, which directly inhibit motor neurons to produce muscle atonia. The authors note that the specific synaptic regulation of these SLD neurons remains incompletely understood.
Why it matters
Mapping the precise cellular circuitry of REM atonia provides mechanistic targets for understanding and managing sleep disorders, including REM sleep behavior disorder, narcolepsy with cataplexy, and obstructive sleep apnea.
Limits
The abstract describes a narrative overview rather than a systematic review or meta-analysis. It provides no primary quantitative data, sample sizes, or clinical trial outcomes, and the underlying neurobiology is largely derived from pre-clinical animal models.
Cited by
- supports Muscle paralysis (atonia) is most pronounced during rapid eye movement (REM) sleep.