View source for Sleep spindles

== Sleep Spindles ==

'''Sleep spindles''' (pronunciation: /sli:p 'spɪndl̩z/) are bursts of brain activity visible on an [[Electroencephalography|EEG]] that occur during stage 2 of [[Sleep|sleep]]. They are called "spindles" due to their distinctive shape on the EEG that resembles a spinning wheel's spindle.

=== Etymology ===

The term "sleep spindle" originates from the spindle-like shape of the waves when observed on an EEG. The word "spindle" itself is derived from the Old English "spinnel", which refers to a spinning tool.

=== Description ===

Sleep spindles are a type of [[Brain Waves|brain wave]] that occur in the [[Thalamus|thalamus]] and are characterized by their frequency, typically between 11 and 16 Hz. They are thought to play a role in inhibiting certain perceptions so that we maintain a tranquil state during sleep. Sleep spindles are also associated with the integration of new information into existing knowledge, as well as directing information to the [[Neocortex|neocortex]].

=== Related Terms ===

* [[K-complex]]: A waveform that often accompanies sleep spindles during stage 2 sleep.
* [[Slow-wave Sleep]]: The deepest phase of non-REM sleep, characterized by the presence of delta waves.
* [[Rapid Eye Movement Sleep|REM Sleep]]: A phase of sleep characterized by rapid eye movements, dreaming, and physiological activity.
* [[Non-rapid Eye Movement Sleep|NREM Sleep]]: The phase of sleep that includes sleep spindles and is divided into stages 1, 2, and 3.

=== See Also ===

* [[Sleep Cycle]]
* [[Sleep Disorders]]
* [[Sleep Deprivation]]
* [[Sleep Hygiene]]

[[Category:Sleep]]
[[Category:Neuroscience]]
[[Category:Psychology]]

{{dictionary-stub}}