Sleep spindles, indicate the onset of Stage NREM2 sleep. They serve as a stabilizing mechanism during sleep state, which will prevent the individual from awakening. Sleep spindles are bursts of sinusoidal 12-14 Hz activity, that wax and wane (travel in
an envelope). They are seen over the fronto-central head regions, most often with a maximum over the central midline. They last from half a second to two seconds on average.<br><br>
<p style="text-align: center;"><img src="@@PLUGINFILE@@/sleep-spindles.png" alt="Sleep Spindles" width="492" height="687" class="img-responsive atto_image_button_text-bottom"><br></p>
<p style="text-align: center;">Figure : Sleep Spindles<br></p>