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content:sleep_spindles [2024/04/03 00:27] – biju.hameed@gmail.com | content:sleep_spindles [2024/04/03 07:33] (current) – biju.hameed@gmail.com |
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====== Sleep spindles ====== | ====== Sleep spindles ====== |
{{ content:sleepspindles.png?500|Sleep spindles in a 3-month-old infant. Source: Grigg-Damberger MM. (2012) J Clin Sleep Med, 8(3), 323-32}}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[(:cite:17557422>{{pmid>long:17557422}})]. On scalp electroencephalography (EEG), spindles are seen as sinusoidal waves that often have a fusiform or “crescendo-decrescendo” morphology[(:cite:14573378>{{pmid>long:14573378}})]. | 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[(:cite:17557422>{{pmid>long:17557422}})]. On scalp electroencephalography (EEG), spindles are seen as sinusoidal waves that often have a fusiform or “crescendo-decrescendo” morphology[(:cite:14573378>{{pmid>long:14573378}})]. See {{ref>sleepspindles}}. |
| <figure center blank|sleepspindles> |
| {{sleepspindles.png}} |
| <figcaption>.Sleep spindles in a 3-month-old infant.Note well-developed sleep spindles in this 30-sec epoch from a PSG recorded on a 3-month-old infant. Sleep spindles between 3-4 months of age often last |
| 5-8 sec and are maximal over Cz. Sensitivity 500 µV peak-to-peak, LFF 0.3 Hz, HFF 35 Hz.[(:cite:pmid22701392>{{pmid>long:22701392}})]</figcaption> |
| </figure> |
===== References ===== | ===== References ===== |
~~REFNOTES~~ | ~~REFNOTES~~ |