Fig. 6: spindle activation in EEG.
From: Physical activity simultaneously improves working memory and ripple-spindle coupling
An example of spindle detected in our analysis. The upper line shows the broad band signal between 1 and 200 Hz. The second time series shows the same signal in the spindle band. The third time series shows the Hilbert transform of the spindle band activity. The last graphic shows the time frequency representation of the signal filtered between 13 and 20 Hz.
