Figure 5From: Evidence of a pharmacodynamic EEG profile in rats following clonidine administration using a nonlinear analysisInstances of ( δ , b ) plots during the first 6 hours and their correlations with sleep/wake stages. The centers of the fuzzy clusters coincides with the centers of the ellipses. The cluster density is an arbitrary measure of the number of points contained within an ellipse. The persistence of the REM sleep inhibition reported by [10] is noticeable.Back to article page