Abstract:
:Active sleep (AS), as measured by the occurrence of myoclonic twitching (MT), is the most prevalent behavioral state in newborn rats. Historically, AS has been considered a developmental precursor of REM sleep, but recently this idea has been questioned. In the present study, the authors assess, in 2-, 5-, and 8-day-old rats, the relationship between MT and nuchal muscle atonia, a widely recognized component of REM sleep. At all ages, muscle atonia preceded MT and persisted until awake behaviors occurred. In addition, muscle tone decreased gradually during transitions from awake behavior to twitching. Thus, MT during infancy occurs against a backdrop of muscle atonia, a result that is consistent with the view that AS is a developmental precursor of REM sleep.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Karlsson KA,Blumberg MSdoi
10.1037//0735-7044.116.5.912subject
Has Abstractpub_date
2002-10-01 00:00:00pages
912-7issue
5eissn
0735-7044issn
1939-0084journal_volume
116pub_type
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