Sleep spindles

Sleep spindles represent an oscillating electrical potential in the brain. They have a characteristic frequency of 11–16 Hz (usually 12–14 Hz in healthy adults) and last from one to several seconds in duration[1]. On scalp electroencephalography (EEG), spindles are seen as sinusoidal waves that often have a fusiform or “crescendo-decrescendo” morphology[2].

1. a Silber Michael H et al. J Clin Sleep Med. 2007 Mar 15;3(2):121-31. PMID : 17557422
2. a De Gennaro Luigi et al. Sleep Med Rev. 2003 Oct;7(5):423-40. PMID : 14573378
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