Sleep Spindles as an Electrographic Element: Description and Automatic Detection Methods

Figure 5

Local spindles. (a) An example of local spindles. Depth EEG along with corresponding spectrograms in the spindle frequency range (9–16 Hz) during 15 s of slow wave sleep. (b) Distribution of involvement (percent of monitored brain structures expressing each spindle). Considering local spindle below of involvement, most sleep spindles are local (21240 spindles in 49 electrodes of 12 individuals). Modified from [30].

(a)

(b)